Blood Group AB Research Articles

A 6-month Review of pRBC Transfusion Practices in a Tertiary Institution in Brooklyn, NY

Abstract Introduction/Objective Many factors are considered when managing hospital blood inventory. Because demographics and types of services vary per institution, a conscious effort to survey the prevalence of different blood types is necessary to make better predictions of inventory adequacy and decrease inappropriate use of O pRBC units. Methods/Case Report We reviewed the transfused pRBC units between October 2023 and March 2024 to determine the number of patients receiving ABO-type specific units and the number of D+ patients receiving D- units. Results (if a Case Study enter NA) After review, the patient population was found to be approximately 80% African Americans. Most of our patients were D+ with a monthly average of 224 patients. In contrast, we served 15 D- patients per month (PPM). Between 21-33% of D+ patients received D- units. O blood type was the most common, with an average of 224 PPM, followed by A blood type at 57 PPM and B blood type at 51 PPM. Since we see an average of 10 AB blood type patients monthly, it wasn’t surprising that they all received non-type specific units. Noteworthy is the significant proportion of A and B blood type patients receiving ABO type-specific units, ranging from 74-85% for A blood type and 70-90% for B blood type. Conclusion Our institution’s commitment to hemovigilance and conservation of O units is evident in the relatively high percentage of patients receiving ABO-type specific units. It is worth noting that we are a tertiary institution mainly serving the African American population. This creates a unique need to maintain adequate O units for emergency transfusion and increase the possibility of using O units to meet our sickle cell disease patients’ needs. Given that our demographics are primarily D+, some of our D- units were utilized in D+ patients. By adhering to our transfusion protocol and surveying our patients’ ABO and D blood types, we can anticipate our inventory needs and help prevent future O pRBC shortages.

An epidemiologic blood group-1

Aim Polycythemia, also known as erythrocytosis, is an abnormal accumulation of red blood cells, packed cell volume, and hemoglobin that can lead to debilitating symptoms and significant mortality. Polycythemia is estimated to affect 22 people per 100,000. The epidemiology of polycythemia in Iraq is limited. This study aimed to investigate the prevalence and incidence of polycythemia in Babylon City, Iraq, from 2018 to 2022 and to identify populations at high risk. Materials and Methods Due to the relative scarcity of epidemiological studies on polycythemia in Iraq, this study was conducted to identify some epidemiological features of polycythemia patients in Babylon province. A study conducted at the Babylon Central Blood Bank included 220 polycythemia patients. This data was obtained by reviewing all patient documents and the registration book from 2018 to 2022. Participants completed a questionnaire with information about their Sex, age, place of residence, smoking habits, and blood group. Statistics were analyzed using SPSS version 23.0 and Prism software. Results were presented in numbers and percentages and analyzed using the Chi-square test. Results Results indicated that polycythemia increased between 2018 and 2020, with the highest numbers in 2018 and decreasing in 2022. There was a higher frequency in the age group of (41-50) years, and it was more common in males with polycythemia (92.72%) who were smokers (79.09%). Most polycythemia patients had the B blood group (38.2%), while the AB blood group had the lowest percentage (5.5%), and most cases were Rh-positive (91.8%). Conclusion this study provided an overview of the epidemiology of polycythemia in Babylon, Iraq. The findings indicate that polycythemia was more prevalent in men of middle age and with blood group B+. Therefore, further research is needed to examine the relevance of the ABO blood group to polycythemia severity and susceptibility. Bangladesh Journal of Medical Science Vol. 23 No. 04 October’24 Page : 1068-1074

AB0 Blood Group Phenotypes and Rhesus Factor in The Pathogenesis of Gestational Diabetes Mellitus

Objective: Some AB0 blood group phenotypes may be considered as risk factors in the pathogenesis of both type II diabetes mellitus (DM) and type I DM. The aim of this research was to investigate whether there is a relation between AB0 blood group phenotypes and Rhesus (Rh) factor and the occurrence of the disease in pregnant female diagnosed with gestational diabetes mellitus (GDM). Method: This research was case-control research, and the data were analyzed retrospectively. Pregnant women who were admitted to a research and teaching hospital for one year and underwent a 75 gram oral glucose tolerance test (OGTT) were included in the research. Pregnant females diagnosed with GDM according to OGTT results were separated into two groups as case group and healthy pregnant females as control group. Result: The prevalence of GDM was found to be 15.94% in a one-year data review. The mean age of pregnant females with GDM was higher than healthy pregnant females (p0.05). Rh factor positivity of both groups was not different (p>0.05). Conclusion: In conclusion, no association was found between the pathogenesis of GDM and AB0 blood group phenotypes and Rh factor.

ABO blood types and head and neck cancer: a systematic review with meta-analysis of observational studies

ObjectivesThis research aims to explore the correlation between ABO blood groups and neoplasms in the head and neck region, specifically investigating the susceptibility of different blood groups to tumours.DesignSystematic review...

Increased expression of ABO blood group antigens secretion phenotype with O blood group and age advances.

To ascertain the prevalence of ABH antigen secretors and non-secretors among Yemenis. In addition to explore the factors that may affect the expression of the secretion phenotype. This cross-sectional study was carried out between May and September 2022 on 215 healthy Yemeni individuals at the International Malaysian University, Ibb, Yemen. The participants were tested for blood group antigen on their blood samples using standard test tube method using the suitable ABH antisera. Saliva was collected and tested for secretion using hemagglutination inhibition test with suitable A, B, and H antisera. Before collecting the blood samples, informed consent was obtained from each participant and complete data and history questionnaire were collected by the research team. In general, 78.1% of Yemini participants were found to be secretor (80% men and 73.3% females). This percentage increased within O blood group (95%) and decreased within AB blood group (54%) individuals. Both O and AB blood groups showed statistically significant association with secretor trait. Also, it was noticed that age advance increases the expression of Se gene. In addition, the secretor state increased among Rh-negative people. The frequency of ABH secretors was 78.1% among Ibb province population in Yemen. Blood group O revealed the greatest frequency (95%), whereas blood group AB showed the lowest secretor frequency (54%). The secretor phenotype was highly expressed gradually with advance age then decline.

Association Between ABO Blood Group, Dental Caries, Gingivitis, Impacted Teeth and Malocclusion Among Saudi Adults: A Cross-Sectional Study.

Whether there is a relationship between blood group and the likelihood of acquiring oral diseases. Therefore, the present study investigated the potential association between ABO blood groups and various dental conditions, including dental caries, gingivitis, malocclusion, and impacted teeth, in Saudi adults aged 18 years and older. A cross-sectional study was conducted on 300 participants who met the inclusion criteria. Data collection included assessment of dental caries status using the decayed missing filled teeth (DMFT) and decayed missing filled surfaces (DMFS) indices, evaluation of gingivitis using the Gingival Index, classification of malocclusion according to Angle's classification system, and recording the presence or absence of impacted teeth. The AB blood group had the significantly highest mean DMFS score (8.58±6.63), while the O blood group had the lowest mean DMFS score (6.37±4.43). Additionally, blood group O showed a slightly higher prevalence of gingivitis (51.92%) than the other blood groups. Blood group A demonstrated a higher prevalence of both Class II (34.2%) and Class III (19%) malocclusions, with statistically significant differences. Regarding impacted teeth, blood group AB (48.8%) had the highest occurrence. There exists an association between oral disease and ABO blood group in Saudi adults. The results of this study indicate that individuals with specific blood types may be more prone to oral diseases, which can aid in the early diagnosis and prevention of these conditions.

ABO and Rhesus blood group variability and their associations with clinical malaria presentations

BackgroundPlasmodium falciparum infection is associated with the human ABO blood group. However, there is a paucity of data on the role that ABO and Rhesus blood groups play in malaria clinical presentations. Therefore, the objective of this study was to assess the association of human ABO blood groups and the Rhesus blood (Rh) types with the severity of malaria.MethodsThis cross-sectional study was carried out at the Suhum Government Hospital in the Eastern region of Ghana. Conveniently, study participants with malaria, diagnosed by microscopy, were selected into the study. Subsequently, their ABO and Rh blood groups were determined (Accucare ABO/Rh monoclonal antibodies, Chennai, India). Malaria severity was assessed using the criteria for assessing severe malarial anaemia published by the World Health Organization. According to the criteria, severe malarial anaemia was classified as having haemoglobin (Hb) < 5 g/dL for children < 12 years and in patients ≥ 12 years, Hb level < 7 g/dL, with parasitaemia > 10,000/µL in both cases. Severe malarial anaemia was also classified as having plasma bilirubin > 50 µmol/L with parasitaemia ≥ 100,000/µL, for all ages. Chi square statistical analysis was used to test the association between the blood groups and the clinical or laboratory findings, while multivariate analysis was performed to identify which blood groups were more vulnerable to develop severe malarial anaemia.ResultsOf the total number of the study participants (n = 328), most of the patients had blood group O Rh positive (35.7%) while few of them had blood group AB Rh negative (2.1%). The types of Rhesus did not associate with malaria. However, compared to blood group O, the odds of developing severe malarial anaemia, in children < 12 years and in patients ≥ 12 years, were 16 times and 17.8 times higher among patients with blood group A, respectively. Furthermore, the odds of having bilirubin level > 50 µmol/L with parasitaemia ≥ 100,000 /µL was 10 times higher among patients with blood groups A and 2.6 times higher in patients with blood group B, compared to blood group O. Finally, in patients with blood group A majority (71.6%) of them developed high temperature (> 37.5 °C) while 43.3% of them vomited and had diarrhoea. However, pallor (group B = 46.2% vs group A = 37.3%), fever (group B = 84.6% vs group A = 79.1%) and nausea (group B = 46.2% vs group A = 25.4%) were more frequent in patients with blood group B than A.ConclusionsThis study found that people with blood groups A and B were severely affected by malaria, with group A being the most vulnerable. It is recommended that blood group assessment be performed for all patients with malaria. Patients found to have blood group A or B must be promptly and efficiently managed to avoid the development of severe malaria anaemia.

Distribution of ABO and Rh Blood Groups in Tibetan and Han Populations With Cleft Lip and Palate in a Tertiary Hospital in Western China

Congenital cleft lip and palate is a common birth defect that seriously affects the lives of the afflicted children and their families. Previously, no research has been done to investigate the pathogenic characteristics of cleft lip and palate among ethnic minorities, for example, Tibetans, a minority ethnic group with a large population in China. This study aims to investigate the relationship between the occurrence of cleft lip and palate in Tibetans and Han Chinese in western China and the distribution of ABO blood groups and Rh blood groups to provide a theoretical basis for the precise prevention and treatment of cleft lip and palate. In this study, statistics on Tibetan patients with cleft lip and palate, some Han patients with cleft lip and palate, and normal controls from western China were retrospectively collected. All participants were patients from West China Stomatology Hospital, Sichuan University. All patients with cleft lip and palate received treatment at the hospital between January 2016 and September 2023. The normal controls were outpatients or inpatients who did not have cleft lip and palate, and who received treatment at the hospital between January 2020 and October 2023. Information on the A, B, O, and AB blood groups and Rh positive and negative blood groups of the patients was collected and compared with that of the normal controls. The incidence of different phenotypes, including cleft lip alone, cleft palate alone, and cleft lip with cleft palate, in patients of blood groups A, B, O and AB were statistically analyzed by Chi-square test. A total of 1227 Tibetan patients with cleft lip and palate, 4064 Han patients with cleft lip and palate, and 5360 normal controls were included in the study. Among all the patients with cleft lip and palate, 1863 had cleft lip alone, 1425 had cleft palate alone, and 2003 had cleft lip with cleft palate. The ABO blood group distribution of Tibetan patients with cleft lip and palate was characterized as O>B>A>AB, with Rh positive blood group accounting for 100%, blood type O accounting for 41.15%, and blood type B accounting for 30.64%. The blood group distribution of the Han patients with cleft lip and palate was characterized as O>A>B>AB, with Rh positive blood group accounting for 99.58%, blood type O accounting for 35.78%, and type A accounting for 30.54%. There was a significant difference in ABO blood groups between Tibetan and Han patients with cleft lip and palate (P<0.005), but no significant difference in Rh blood groups. The ABO blood group distribution of the Tibetan patients with cleft lip and palate showed an obvious difference from that of the control group, while those of the Han patients with cleft lip and cleft palate and the control group did not show obvious differences. In the analysis of the subtypes, it was found that the blood group distribution in the subtypes of cleft lip alone, cleft palate alone, and cleft lip with cleft palate in the Tibetan population was O>B>A>AB, while that in the Han Chinese population was O>A>B>AB. There were differences in blood group distribution between Tibetans and Hans of the subtypes of cleft lip alone and cleft lip with cleft palate (P<0.001), but there was no difference in blood group distribution in the population of cleft palate-only subtype. The proportion of blood type O in Tibetan patients with cleft lip and palate was significantly higher than that in the Han patients with cleft lip and palate. The blood group distribution of Tibetan patients with cleft lip and palate in Sichuan Province, Xizang Autonomous Region, and Qinghai Province was always O>B>A>AB. Tibetan patients from Shiqu County and Baiyu County, Ganzi Tibetan Autonomous Prefecture and Chaya County, Qamdo City were predominantly of blood type B, and those from other regions were mainly of blood type O. There were significant differences in the phenotype composition and ABO blood group distribution between the Tibetan and Han populations with cleft lip and palate in western China. The distribution of blood group O in the population with cleft lip and palate was higher than that in the normal population, and the same trend was observed for different phenotypes. However, differences between Tibetan and Han populations in ABO blood group distribution were only found in the phenotypes of cleft lip only and cleft lip with palate. Tibetans with blood type O are more prone to cleft lip deformity than Han people, and the effect in the phenotype of cleft lip with palate is less pronounced than that in the phenotype of cleft lip only.

The association between ABO blood types and peripherally inserted central catheter-related venous thrombosis for patients with cancer: A retrospective 7-year single-center experience and meta-analysis.

This meta-analysis evaluated the association of ABO blood type on central venous catheter-related thrombosis (CRT). Data were derived from 8477 patients at Sichuan Cancer Hospital from January 2015 to December 2021 and articles previously published in Chinese and English databases. Data from our hospital were collected by reviewing electronic medical records. Searched databases included CNKI, VIP, Wan Fang, China Biomedical, PubMed, Cochrane Library, Web of Science, EMBASE, CINAHL, and OVID (up to July 2023). All statistical analyses were performed using SPSS 22.0 and Revman 5.3. The Bonferroni method was used to adjust the α test level for reducing the risk of I errors in the multiple comparisons. A P-value < 0.05 was considered statistically significant. Continuous variables were analyzed using a two-independent sample T test. The chi-squared test was used to analyze categorical data. A total of 818 studies were identified in the search. However, only four studies met the inclusion criteria. Combined with data from our hospital, five studies were included with a total of 18407 cases. Those studies only focused on peripherally inserted central catheter (PICC). According to the data from our hospital, logistic regression revealed that myelosuppression [odds ratio (OR), 1.473; P = 0.005) and radiotherapy(OR, 1.524; P<0.001) were independent risk factors for symptomatic PICC- VTE. Blood types A (OR, 1.404; P = 0.008), B (OR, 1.393; P = 0.016), and AB (OR, 1.861; P<0.001) were associated with a significantly higher risk of symptomatic PICC-VTE than blood type O. And the hematologic tumor has a significantly higher risk of PICC-VTE than breast cancer (OR, 0.149; P < 0.001), and gynecological tumor (OR, 0.386; P = 0.002). In the meta-analysis of the association between ABO blood type and PICC related thrombosis, the I2 statistic was not significant in any of the pairwise comparisons, and a fixed-effects model was subsequently used for all analyses. The meta-analysis indicated that the incidence of symptomatic PICC related thrombosis was significantly lower in individuals with the O blood type (3.30%) than in those with the A (4.92%), B (5.20%), or AB (6.58%) blood types (all P < 0.0083). However, in the pairwise comparisons among A, B, and AB, the differences were nonsignificant (P > 0.0083). According to the results from our single center analysis, we found that myelosuppression, radiotherapy, hematologic tumor, and non-O blood type were independent risk factors for symptomatic PICC related thrombosis. In the meta-analysis of further exploration of ABO blood type and PICC related thrombosis, we found that ABO blood type may influence PICC related thrombosis, and individuals with the O blood type had a lower risk of PICC related thrombosis than those with non-O blood type.

Role of Maternal ABO Blood Type on Adverse Obstetric Outcomes

Abstract: This retrospective chart review evaluates the potential role of maternal ABO blood type on various adverse obstetrical outcomes for both mother and neonate, including maternal hypertensive disorders, GDM, fetal growth restriction, clinical chorioamnionitis and other related disease processes. Methods: Delivery records were obtained from the electronic medical record (EMR) for deliveries occurring between 1/1/2020 and 12/31/2022. Data were extracted from nurse entered fields in the EMR during the delivery encounter (blood type, maternal age, body mass index (BMI), gestational age at delivery, quantitative blood loss, mode of delivery, and presence of Category 2 tracing,). Missing data were obtained through chart review. Other variables obtained through chart review included maternal pregnancy history, clinical chorioamnionitis diagnosis, fetal growth restriction, stillbirth, prolonged rupture of membranes, indications for cesarean section, hypertensive disorders of pregnancy, and medical history including chronic hypertension, gestational and pre-gestational diabetes, thrombophilia, bleeding disorder, venous thromboembolism, seizure disorder, cholestasis of pregnancy, and COVID infection. Comparisons between maternal blood type AB vs. all other blood types (group containing blood types A, B, and O) were completed using Student’s t-tests, Mann Whitney U tests, Pearson’s chi-square tests, or Fisher’s Exact tests as statistically appropriate. Comparisons between the 4 individual blood types (AB, A, B, O) were completed using ANOVA, Pearson’s chi-square tests, or Kruskal-Wallace tests as statistically appropriate. Post-hoc multivariate logistic regression was used to examine associations of interest identified on bivariate analysis. Results: A total of 3263 deliveries were reviewed from between 1/1/2020 and 12/31/2022. Of these, 113 patients had blood type AB (3.5%) and 3150 had other blood types (1015 type A, 463 type B, 1672 type O). Patients with blood type AB had statistically higher age than other blood types (31.0 ± 5.2 vs. 29.9 ± 6.1, p=0.046) and lower BMI (31.2 [IQR 7] vs. 33 [IQR 9.5], p =0.009). There were no differences in nulliparity, gestational age at delivery, chronic hypertension, gestational diabetes, cholestasis of pregnancy, quantitative blood loss, postpartum hemorrhage, clinical chorioamnionitis, fetal growth restriction, stillbirth, category 2 tracing, or mode of delivery. Patients with blood type AB had a gestational hypertension rate of 14% compared to 9% in other blood types (p=0.059). This association was further explored in multivariate logistic regression for prediction of gestational hypertension, which showed a statistically significant association for blood type AB vs. other (p=0.032, OR 1.91 (95% CI 1.06-3.43)) when controlling for age (p=0.074, OR 0.98 (95% CI 0.96-1.00)), BMI (p&lt;0.001, OR 1.05 (1.04-1.07)), and gestational age (p=0.041, OR 1.06 (1.00-1.11)). However, patients with blood type AB had a rate of preeclampsia and superimposed preeclampsia of 3.6% compared to 8.9% in other blood types (p=0.05). This, too, was further explored in a regression for prediction of preeclampsia and superimposed preeclampsia, which did not show a statistically significant association for blood type AB vs. other (p=0.089, OR 0.36 (95% CI 0.11-1.17), when controlling for age (p=0.59, OR 0.99 (0.97-1.02)), BMI (p&lt;0.001, OR 1.06 (1.05-1.08)), and gestational age (p&lt;0.001, OR 0.88 (0.86-0.91)). A third regression model on any hypertensive disorder of pregnancy (including gestational hypertension, preeclampsia with or without severe features, eclampsia, and superimposed preeclampsia) did not show a statistically significant association for blood type AB vs. other (p=0.65, OR 1.13 (95% CI 0.66-1.95)) when controlling for age, BMI, and gestational age. Four-way comparisons between the 4 individual blood types (AB, A, B, O) did not show differences in any of the outcomes. Conclusion: Previous investigations have found variable results regarding maternal blood type and adverse obstetrical outcomes including hypertensive disorders, gestational diabetes, and perinatal diseases. A previous study by Burgess et al. found that mothers with type AB blood had an increased risk of developing late onset preeclampsia, while Hentschke et al. found no association between preeclampsia and maternal blood type. Reisig et al. found a significant correlation between type A+ mothers and the development of preeclampsia. This retrospective chart review of 3263 deliveries was performed to further investigate these associations and address this knowledge gap. It has been shown that AB blood type is associated with stimulated antigen response, an increased prothrombotic state and increased disease risk. In this study, maternal AB blood type was found to be associated with gestational hypertension. However, this association was likely due to a Type I error, as no other association with other hypertensive disorders, such as pre-eclampsia, was found to be significant. We found no other statistically significant correlations between maternal blood type and adverse obstetrical outcomes. Although previous studies have demonstrated a potential association between maternal AB blood type and adverse outcomes, our study, with a substantial sample size, did not yield similar results. In conclusion, physicians should not depend on maternal blood type as a reliable indicator of potential obstetrical outcomes or when identifying high-risk mothers.

Associations of air pollution with acute coronary syndromes based on A/B/AB versus O blood types: case-crossover study

Short-term exposure to air pollutants may contribute to an increased risk of acute coronary syndrome (ACS). This study assessed the role of short-term exposure to fine particulate matter (PM2.5) as well as fine and coarse PM (PM10) air pollution in ACS events and the effect of blood groups on this phenomenon. A retrospectively collected database of 9026 patients was evaluated. The study design was a case-crossover using a conditional logistic regression model. The main analysis focused on PM2.5 levels with a 1 day lag until the ACS event, using threshold-modelled predictor for all patients. Secondary analyses utilized separate threshold-modelled predictors for 2–7-days moving averages and for patients from specific ABO blood groups. Additional analysis was performed with the non-threshold models and for PM10 levels. Short-term exposure to increased PM2.5 and PM10 levels at a 1-day lag was associated with elevated risks of ACS (PM2.5: OR = 1.012 per + 10 µg/m3, 95% CI 1.003, 1.021; PM10: OR = 1.014 per + 10 µg/m3, CI 1.002, 1.025) for all patients. Analysis showed that exposure to PM2.5 was associated with increased risk of ACS at a 1-day lag for the A, B or AB group (OR = 1.012 per + 10 µg/m3, CI 1.001, 1.024), but not O group (OR = 1.011 per + 10 µg/m3, CI 0.994, 1.029). Additional analysis showed positive associations between exposure to PM10 and risk of ACS, with 7-days moving average models stratified by blood group revealing that exposures to PM2.5 and PM10 were associated with elevated risk of ACS for patients with group O. Short-term exposures to PM2.5 and PM10 were associated with elevated risk of ACS. Short-term exposure to PM2.5 was positively associated with the risk of ACS for patients with A, B, or AB blood groups for a 1-day lag, while risk in O group was delayed to 7 days.

Differences in SARS-CoV-2 antibodies depending on age, blood group, and sex in a Swedish blood donor cohort

This study aimed to describe differences in prevalence and the long-term presence of nucleocapsid antibodies (N-antibodies) elicited by SARS-CoV-2 infection in a Swedish blood donor population not subjected to lockdown. We tested 20,651 blood donor samples for nucleocapsid antibodies from the beginning of March 2020 and 27 months onwards using the Roche Elecsys Anti-SARS-CoV-2 assay. The proportion of positive SARS-CoV-2 antibody samples was determined each week. After the exclusions of one-time donors and subjects with incomplete data, 19,726 samples from 4003 donors remained. Differences in antibody prevalences stratified for age, sex, and blood groups (ABO and RhD) were determined, as well as antibody loss and recovery. Lower antibody prevalence was seen for older donors, blood group AB, and RhD-negative subjects. A significant decrease in antibody titer between the first and the second antibody-positive donation was seen for the whole study group, females, older subjects, blood group O, AB, and RhD-positive subjects. The titer waned below the detection limit in 60 (3.0%) of 1983 N-antibody-positive donors, and for 18 of these donors, a second episode with antibodies was detected. We showed that N-antibodies persist for months or years and that surprisingly few antibody-positive donors lost their antibodies. We also conclude that antibody prevalence in a Swedish population never subject to lockdown did not apparently differ from populations that were subject to stricter regulations.

Haemoglobin Variants, ABO/Rh Blood Groups and their Associa-tions with Levels of Malaria Parasitaemia amongst Infected Subjects at Rivers State University, Port Harcourt, Nigeria

The aim of the study was to associate haemoglobin variants, ABO/Rh blood groups with levels of malaria parasitaemia amongst infected subjects at Rivers State University, Port Harcourt, Nigeria. ABO/Rh D blood groups were analyzed using monoclonal antisera, and haemoglobin electrophoresis was analyzed using the alkaline cellulose acetate electrophoresis method, while malaria parasites were identified by microscopic examination of stained blood films. Graph Pad Prism version 8.0 was used to statistically analyze odd ratios, confidence intervals, likelihood ratios and relative risks. All 147 subjects (87 females, 60 males) were positive for malaria (Plasmodium falciparum). For 3+ falciparum malaria, the order of infection for haemoglobin genotype was AA &gt; AS/SS; ABO blood group was B &gt; A &gt; O &gt; AB; Rh blood group was Rh D+ &gt; Rh D-; gender was females &gt; males at p &gt; 0.05. At p &gt; 0.05, for 2+ falciparum malaria: haemoglobin genotype was SS &gt;AA &gt; AS; ABO blood group was B &gt; A &gt; O &gt; AB; Rh blood group was Rh D- &gt; Rh D+; and gender was females &gt; Males. At p &gt; 0.05, for 1+ falciparum malaria infection: haemoglobin genotype was AS &gt;AA &gt; SS; ABO blood group was AB &gt; O &gt; A &gt; B; Rh blood group was Rh D+ &gt; Rh D-; and gender was males &gt; females. Conclusively, 3+ Plasmodium falciparum malaria infection is common amongst individuals with: AA haemoglobin genotype, blood group B, Rh D+, and females; 2+ P. falciparum infection is common amongst individuals with: haemoglobin genotype AA, blood group B, Rh D-, and females; while 1+ P. falciparum malaria infection is common amongst individuals with: AS haemogobin genotype, blood group AB, Rh D+, and amongst males than females.

The ABO blood group antigens in patients with oral lichenoid reaction.

Evaluating the association of ABO blood group with different delayed hypersensitivity reactions, such as oral lichenoid reaction (OLR), can provide a new perspective for clinical practice. Therefore, this study designed to investigate ABO blood group antigens in OLR patients. In this case-control study, the ABO blood group of 112 OLR patients and 117 individuals without oral lesions were included. Gender, age, characteristics of the lesions, medications and restorative materials recorded. Chi-square test used to compare the frequency of ABO blood groups in OLR patients with controls. The O blood group was significantly higher in OLR patients and all its subtypes. Also, there were significant relation between O blood group, and severity of lesions. The frequency of dysplasia was non-statistically significant higher in OLR patients with O blood group than other blood group. Based on the results of the present study, O blood group was significantly more in patients with lichenoid reaction than control group, and AB blood group was the lowest. Also, O blood group showed a positive association with the more severe form of OLR lesions and frequency of dysplasia.

Comparative Study of Men and Knock-in Mice Expressing Red Cell Glycophorin B-A-B hybrid Protein Identifies Physiological Functions of SLC4A1 (band 3)

GP.Mur is a common Southeast Asian red blood cell (RBC) type, with 4.7% prevalence in Taiwan (compared to 5.8% AB blood type). In people with the GP.Mur (glycophorin B-A-B hybrid) type, their expression of Cl−/HCO3− anion exchanger-1 (AE1; SLC4A1; band 3) on the RBC membrane is increased. Glycophorin A, as well as this glycophorin B-A-B variant, are chaperone proteins that promote SLC4A1 folding and protein formation by 10% or more. Healthy people with the GP.Mur blood type exhibit two unique physiological features: (1) slightly higher blood pressure, and (2) more effcient CO2 excretion. Human and mouse lacking SLC4A1 cannot survive postnatally. As the physiological impacts and mechanisms of SLC4A1 are unclear, we created a knock-in mouse model of human GYP.Mur. To verify whether these physiological features could indeed be the direct consequences of GYP.Mur expression, we tested the knock-in mice by (1) blood pressure measurements with antihypertensive drug challenges, and (2) whole-body plethysmorgraphy (WBP)-respiration measurements. We found that GYP.Mur knock-in mice also expressed more SLC4A1 on the RBC membrane. The knock-in mice exhibited significantly higher mean arterial pressure (MAP) than age-matched control C57BL/6J mice, with differential antihypertensive sensitivities. In WBP measurements on freely-moving mice, GYP.Mur knock-in and the control mice also showed differential respiratory patterns, which were diminished with acetazolamide pretreatments. Thus, GYP.Mur knock-in mice recapitulates the major phenotypes of people carrying the GP.Mur blood type. Taiwan Ministry of Science &amp; Technology (MOST 108-2628-B-195-001; 109-2628-B-195-001; 110-2628-B-195-001); Taiwan MacKay Memorial Hospital. This is the full abstract presented at the American Physiology Summit 2024 meeting and is only available in HTML format. There are no additional versions or additional content available for this abstract. Physiology was not involved in the peer review process.

MCU NODE BASED BLOOD GROUP DETECTION EQUIPPED WITH AN AUTOMATIC SAMPLE STIRER

Blood type detection tool is a tool that can help In reading blood groups, you can find out the type of group blood with use sensors Light And LED, so in use tool This be equipped Gearboxes as stirrer sample automatic Which Where fluid reagent antisera will stirred with sample blood using the ABO method, results in sensor readings will be displayed on the LCD and also on the application when using Nodes MCU as the microcontroller, based on results testing tool This use 3 person with group blood Which The same on each Blood group samples are A, B, AB, O by comparing groups blood on card identity And results testing Which Where the result can obtained results Which The same. With mark flat flat group blood A is 0.6 and 2.1. As for blood type B, it is 1.7 and 1.1. As for AB blood type is 0.9 and 1.1. And blood type O is 2,3 And 2,3. whereas For mark error Which obtained group blood A that is 0.5 error value for blood group B i.e. 0.5 error value for blood group AB i.e 0.6, And error value for blood type O namely 0.2.

Detection of ABH Antigen in Sudanese Patients with Chronic Renal Failure in Shendi Town, Sudan

Background: Patients suffering from chronic renal failure have significant challenges in their social and economic lives. In Sudan, the annual incidence of chronic renal failure is between 70 and 140 cases per million, and until more is done to address this illness, the problem is likely to persist. Blood group types appear to be associated with secretor status and certain disorders, in addition to the main therapeutic significance of the ABO blood group to organ transplantation and blood transfusions. Objective: To determine the prevalence of ABO and secretor status, a descriptive cross-sectional study was carried out among Sudanese patients receiving hemodialysis for chronic renal failure disease at the kidney treatment and surgical center in Shendi City between August and December 2021. Materials and Methods: Fifty samples total from patients with chronic renal failure were taken; of these, 42% were female and 58% were male. Two milliliters of venous blood and three milliliters of saliva were collected in sterile containers and EDTA anticoagulant containers, respectively. Slides were used to do ABO grouping, and absorption inhibition was used to determine secretor status. Results: 44% of patients with CKD were blood group O, 38% were blood group A, 16% were blood group B, and 2% were blood group AB. The data also revealed that 68% of patients with CKD were non-secretors and 32% were secretors. According to the study, there was a decrease in the frequency of the Se gene compared to the Se gene. The homozygous genotype SeSe was found to be 3%, the heterozygous genotype Sese to be 29%, and the recessive genotype Sese to be 68%. Additionally, the blood groups O and A have a higher risk of renal failure. Conclusions: Blood group O was the highest frequency among patients receiving hemodialysis for chronic renal failure, followed by blood groups A and B, while blood group AB was the least prevalent. The non-secretors had a higher genotype frequency. Renal failure is more common among non-secretors.

Prevalence of Malaria and Helicobacter Pylori Coinfection and Associated Sociodemographic Factors among Blood Donors in Douala General Hospital

Background: The malaria parasite Plasmodium is intra-erythrocyte hence can be transmitted by transfusion of any blood component containing infected red blood cells. Helicobacter pylori infection affects more than half of the human population worldwide. Infection remains asymptomatic in most individuals, although some individuals develop acute gastritis, peptic or duodenal ulcers, gastric cancer, and mucosa associated tissue lymphoma. H. pylori infection have been implicated in some haematological manifestations such as anaemia and micronutrient deficiency. Objective: This research was designed to determine the prevalence of malaria parasitaemia and H. pylori coinfection in association with sociodemographic characteristics among donors in Douala General Hospital. Methodology: The study was a hospital-based study carried out from January to May 2022. The study population comprised of 106 donors who came to the hospital laboratory for blood donation. A structured questionnaire was used to get demographic and clinical data. Two ml of blood was collected from individuals to prepare a thick and thin blood film for malaria parasite determination and to centrifuge at 3000 rpm for 5 minutes to obtain plasma for H. pylori test strip. Results and Discussion: The overall prevalence of H. pylori in the study area was 70.8%. The female donors had a prevalence of 72.0%. A greater proportion of blood group O donors had H. pylori than groups A, AB and B but this difference was not significant (P-value = 0.571). The prevalence of malaria parasites infection was 36.8%. Those of blood group A had a higher prevalence rate of 42.3% (11/26). Out of the 106 donors, 23 (21.7%) had malaria and H. pylori coinfection. 68 (64.2%) donors had a mono-infection that is either having malaria mono-infection or H. pylori mono-infection and 15 (14.2%) had no infection. Malaria and H. pylori coinfection was higher in female donors than males (OR = 1.059, 95% Cl 0.359 -3.119, P =0.917), in donors aged below 25 years old (OR = 0.338, 95% Cl 0.075 - 1.535, P =0.160), replacement donors (OR = 1.350, 95% Cl 0.460 – 3.964, P =0.585); blood donors of blood group AB (OR = 0.654, 95% Cl 0.181 – 2.366, P =0.517) and Rhesus negative donors (OR = 1.500, 95% Cl 0.130 – 17.36, P =0.746). Conclusion: The prevalence of H. pylori infection and Malaria among blood donors in Douala General Hospital were high and coinfection was higher in females than males. Both malaria parasites and H. pylori infections have been implicated in blood parameters such as anaemia and micronutrient deficiency. It is therefore recommended that routine screening for malaria parasites and H. pylori be done in blood banks before transfusion for a high blood quality.

COVID-19 Susceptibility among ABO/RH Blood Groups in Tamil Nadu Population: A Retrospective Case–Control Study

Background: COVID-19 is a world pandemic with clinical manifestation from mild subclinical infection to severe illness. Literature suggests an evident correlation between the ABO blood group, Rhesus blood group, and COVID-19 in the recent past. The role of blood group in disease susceptibility and severity of COVID-19 varies in different geographical locations, as ABO blood group distribution varies among the human population with the impact of migration. Although various research have been done globally, scientific evidence with respect to the south Indian population remains limited, emphasizing the need for the present study to analyze the association of COVID-19 and blood groups in Tamil Nadu. Aim: The aim of this study was to analyze the potential susceptibility of COVID-19 among the blood groups (ABO and Rh type) in Tamil Nadu population. Materials and Methods: This was a noninterventional retrospective case–control study, with 500 patients who tested positive for COVID-19 being taken as the “cases,” while another 500 who tested negative were taken as the “controls.” The medical records, including the blood group and Rh factor, were collected from the government-recognized testing centers (Government Medical Hospital and Primary Health Centers, Tiruvallur, and Frontier Lifeline Hospital, Chennai) in Tamil Nadu, who came for COVID-19 screening by reverse transcriptase–polymerase chain reaction. The data were analyzed to associate its correlation with different blood groups. Results: Blood Group A showed significantly higher distribution among the cases (P = 0.030), and blood Groups O and B were significant among the controls (P = 0.026 and P = 0.000, respectively). Blood Group AB did not show any significant differences between the groups (P = 0.374). The odds ratio for AB, A, O, and B Groups for Rh (positive and negative) were shown to be 0.659, 0.591, 0.472, and 0.262, respectively, suggesting increased susceptibility toward Rh positive factor. Conclusion: In our study, blood Group A was found to be the most susceptible and blood Group O to be the least susceptible to COVID-19 in the Tamil Nadu population. In addition, the Rh positive factor showed more inclination toward COVID susceptibility than the Rh negative factor. ABO blood group may be considered a potential nonmodifiable and secondary risk factor for COVID-19 contributing to the disease pathobiology at immunological, biochemical, and physiological levels. Still, the intensity of their role and their exact mechanism in its association requires further exploration to validate the current findings.

The relationship between the ABO blood group and chronic venous disease in deep vein thrombosis

Aims: This study aims to investigate the relationship between the ABO blood group and chronic venous disease in terms of deep vein thrombosis (DVT). Methods: This study was planned as a retrospective case-control study in which 1031 patients were included between February 1, 2022, and July 1, 2022. After systematic sampling, the case group (88) and the control group (113) were analyzed in terms of blood groups. Then the patients were divided into 3 groups. group 1: patients with non-O blood group and chronic venous disease (CVD) (n=75), group 2: patients with non-O blood group and non-CVD (n=73), and group 3: patients with O blood group and CVD patients (n=28). It was analyzed whether there was a difference between these 3 groups and from which group and in what form. Results: The non-O blood group was significantly higher in the DVT group than the control group (p=0.001). There was no significant difference between A, B, and AB blood groups (p=0,21, p=0,51, p=0,08, respectively). When group 1, group 2, and group 3 were compared, a significant difference was found (p=0,006). In the posthoc analysis, no difference was found between group 1 and group 2 (p=0.99), a difference was found between group 3 and group 1 - group 2, and it was found to be lower (p=0.34, p=0.46, respectively). Conclusion: We found the non-O blood group was higher in the DVT group compared to the control group. We found that the non-O blood group alone was higher in patients with DVT than CVD alone. While non-O blood type and CVD are important risk factors for DVT, non-O blood type can increase the risk of DVT more than CVD. However, this finding needs to be discussed in future studies.