Positive Rapid Test Result Research Articles

Malaria and dengue fever in febrile children entering healthcare facilities in Mwanza, Tanzania.

Plasmodium spp. infections and cases of malaria are a long-standing public health problem for children living in middle- and low-income countries. Dengue virus causes an emerging under-recognized disease burden. A cross sectional study was conducted between March 2020 and December 2021 to determine the status of malaria and dengue fever, and the associated factors in children living in Mwanza, Tanzania. Clinical features were recorded; blood samples were analyzed using dengue NS1 rapid diagnostics test (NS1-RDT), malaria rapid diagnostic test (MRDT) and PCR and microscopy for malaria parasites. Descriptive analysis was based on infection status; odds ratio and confidence interval were used to determine the factors associated with dengue fever and malaria. The prevalence of malaria in the 436 children included in the final analysis was 15.6%, 8.5%, and 12.1% as determined by MRDT, blood smear examination and PCR, respectively. The prevalence of dengue fever determined by the NS1-RDT was 7.8%. Body rash, muscle and joint/bone pain were associated with a positive rapid dengue test result. Retro-orbital pain characterized Plasmodium spp. and dengue virus co-infections. Clinical signs and symptoms could not readily differentiate between malaria and dengue fever patients or patients co-infected with both causative agents underscoring the urgent need for the accurate laboratory diagnostics. Additional large-scale studies are required to assess the epidemiological burden of acute febrile illness in developing countries and to produce data that will guide empirical treatment.

Frequency of Group A Streptococcus Infection and Analysis of Antibiotic Use in Patients with Pharyngitis-A Retrospective, Multicenter Study.

Streptococcus pyogenes is responsible for 20-30% of pharyngitis in children and 5-15% in adults. The ineffective treatment of group A Streptococcus (GAS) infections can result in postinfectious sequelae. This study aims to evaluate the frequency of GAS pharyngitis and assess the management of patients with pharyngitis and antibiotic use. We conducted a multicenter, retrospective analysis of medical records from nine primary care centers in Poland. The study enrolled 1949 medical records of patients (children 67.4%, adults 32.6%). An infection of Streptococcus pyogenes, based on a rapid strep test, was diagnosed in 830 patients (42.6%). In the comprehensive study group of 1949 patients, 1054 (54.1%) were given antibiotics. Notably, 224 patients had a negative rapid strep test result but still received antibiotic treatment, underscoring the complexity of treatment decisions. The most commonly used antibiotics were oral penicillin V in 431 cases (41%) and amoxicillin in 219 cases (20.8%). We observed no significant difference between positive rapid strep test results and patients' sociodemographic data and comorbidities. The prevalence of GAS was 42.6% in the analyzed records of patients with pharyngitis, and 54.1% were prescribed antibiotics. Antibiotics were overprescribed for sore throats. Strategies are needed to promote rational antibiotic use.

Clinical feature of omicron infection in children with inborn errors of immunity in China.

SARS-CoV-2 infection is hypothesized to be more severe in immunocompromised patients; however, clinical outcomes in children with inborn errors of immunity (IEI) during the Omicron pandemic in China have not been reported. This cohort study retrospectively reviewed 71 SARS-CoV-2-infected children with IEI using nationwide data from the National Center for Children's Health of China. COVID-19 was diagnosed by a positive rapid antigen or nucleic acid test result. Among 71 SARS-CoV-2-infected children with IEI, male preponderance (male: female ratio of ~1.8:1), a median age of 8 years (IQR 3-11), and a predominance of antibody deficiency (19/71, 26.8%) were detected. Most of the patients got infected through household transmission, while a small proportion of them did so during hospital visits. The mean time periods were 3.3 days (n=44) for incubation, 8.4 days for symptoms (n=69), and 8.8 days for viral shedding (n=37). The time to viral shedding was proportional to the symptomatic period (R2 = 0.1243, p=0.0323) and prolonged in children with X- linked agammaglobulinemia. The most common symptoms of COVID-19 were fever, and some children showed only aggravation of the underlying disease. 15% of IEI children progress to pneumonia, 85% require medication, 17% are admitted to hospital, and 4.1% are classified as critical. Previously application of anti- infective medications was associated with an increased risk of hospitalization after COVID-19 infection. Of the 71 children with IEI, all recovered from COVID- 19. Overall, Omicron variant did not cause significant life-threatening infections among children with IEI in China, and most of them had a good clinical outcome. Nevertheless, these children exhibit an increased vulnerability to higher hospitalization rates, pneumonia, and severe illness compared to the general pediatric population.

Comparison of two different serological methods in the diagnosis of Rotavirus and Adenovirus in stool samples

Objective: Rotaviruses are the most common cause of acute infectious diarrhea in children under 5 years of age worldwide. This study aims to compare the immunochromatographic and ELISA methods, determine the sensitivity and specificity of the methods used, and shed light on humanity to diagnose the disease correctly. Method: Stool samples of 1000 patients sent to Diyarbakır Pediatrics Hospital for rapid antigen testing of Rotavirus were studied. Single-stage Rotavirus and Adenovirus Co-immunochromatographic and ELISA methods were used in the examination of the samples. Samples with positive rapid test results were taken into 1.5 ml microcentrifuge tubes, and positive antigen samples collected for the ELISA test were stored at -80°C until the time to be studied. Results: Of 1000 stool samples analyzed, 40 (11.59%) of 345 girls and 60 (9.16%) of 655 boys had Rotavirus antigen in a total of 100 (10%) and 20 (2%) had Adenovirus antigen (P> 0.05). Viral antigen-positive cases were seen most frequently in winter months (December, January, February). There was no statistically significant difference between the data in terms of age and gender (P

Clinical Evaluation of Direct Reverse Transcription PCR for Detection of SARS-CoV-2 Compared to Conventional RT-PCR in Patients with Positive Rapid Antigen Test Results during Circulation of Emerging Viral Variants.

The emergence of the Omicron (B.1.1.529) variant of SARS-CoV-2 has precipitated a new global wave of the COVID-19 pandemic. The rapid identification of SARS-CoV-2 infection is imperative for the effective mitigation of transmission. Diagnostic modalities such as rapid antigen testing and real-time reverse transcription polymerase chain reaction (RT-PCR) offer expedient turnaround times of 10-15 min and straightforward implementation. This preliminary study assessed the correlation between outcomes of commercially available rapid antigen tests for home use and conventional reverse transcription polymerase chain reaction (RT-PCR) assays using a limited set of clinical specimens. Patients aged 5-99 years presenting to the emergency department for SARS-CoV-2 testing were eligible for enrollment (n = 5652). Direct PCR and conventional RT-PCR were utilized for the detection of SARS-CoV-2. The entire cohort of 5652 clinical specimens was assessed by both modalities to determine the clinical utility of the direct RT-PCR assay. Timely confirmation of SARS-CoV-2 infection may attenuate viral propagation and guide therapeutic interventions. Additionally, direct RT-PCR as a secondary confirmatory test for at-home rapid antigen test results demonstrated sensitivity comparable to conventional RT-PCR, indicating utility for implementation in laboratories globally, especially in resource-limited settings with constraints on reagents, equipment, and skilled personnel. In summary, direct RT-PCR enables the detection of SARS-CoV-2 with a sensitivity approaching that of conventional RT-PCR while offering expedient throughput and shorter turnaround times. Moreover, direct RT-PCR provides an open-source option for diagnostic laboratories worldwide, particularly in low- and middle-income countries.

The prevalence of COVID-19 among healthcare professionals at primary healthcare centers

Background: The SARS-CoV-2 infection typically triggers discernible immunological responses in most reported cases. Employing a serological test could identify prior asymptomatic infections and aid in evaluating an individual's immune status. Given that healthcare professionals face a higher risk of COVID-19 exposure, the utilization of personal protective equipment remains the foremost approach in averting disease transmission within healthcare facilities. Objectives: To ascertain the prevalence of COVID-19 among healthcare professionals working in primary healthcare centers located within the AL-Sader city district. Method: During the period between November 1st, 2020, and December 31st, 2020, a cross-sectional study was carried out in nine primary healthcare centers, chosen through a cluster random sampling method. Result: Out of the 470 participants included in the study, 101 (21.5%) had a documented history of COVID-19 infection, with 76 confirmed through polymerase chain reaction analysis. Notably, a notable correlation between a positive rapid immunological test result and a prior history of COVID-19 infection (p-value < 0.001). The rapid test showed a sensitivity of 56.6% and a specificity of 79.2%. Specifically, 125 participants (26.6%) tested positive using the rapid test, with 104 (83.2%) exhibiting IgG antibodies, 5 (4%) displaying IgM, and 16 (12.8%) showing both IgG and IgM antibodies. Conclusion: The prevalence of COVID-19 infection among participants exceeded the anticipated levels. Significantly, there was a discernible correlation between positive rapid test results and COVID-19 infection, as well as factors such as smoking, comorbidities, PPE training, and household infections.

Molecular Characterization of Genital and Extragenital Lesions With the PlexPCR VHS Assay in Patients Diagnosed With Syphilis.

Syphilis diagnosis relies on immunologic markers and clinical protocols. However, syphilitic lesions can be confused with other genital ulcer diseases. Using a PlexPCR VHS assay, we analyzed lesion DNA samples from 87 individuals who were clinically diagnosed with early syphilis infection and had at least 1 positive serologic test result. DNA was detected by the PlexPCR VHS multiplex assay and β-globin genes. Among the participants, 99% (86/87) had a positive rapid treponemal test result. DNA was successfully detected in 91% (79/87) of the lesion samples. PlexPCR VHS identified 5 herpes simplex virus (HSV)/Treponema pallidum coinfections (2 HSV-1 and 3 HSV-2), only T pallidum DNA in 62% (49/79), and only HSV-2 in 12.7% (10/79). While 19% (15/79) were negative for all pathogens, none were varicella zoster virus positive. The PlexPCR VHS had 68.4% agreement with the clinical diagnosis. Since the PlexPCR VHS detects multiple organisms simultaneously, it can help to confirm actual syphilis and identify other pathogen coinfections or the pathogen causing the ulcer.

Evolution of Spatial Risk of Malaria Infection After a Pragmatic Chemoprevention Program in Response to Severe Flooding in Rural Western Uganda.

Malaria epidemics result from extreme precipitation and flooding, which are increasing with global climate change. Local adaptation and mitigation strategies will be essential to prevent excess morbidity and mortality. We investigated the spatial risk of malaria infection at multiple timepoints after severe flooding in rural western Uganda employing longitudinal household surveys measuring parasite prevalence and leveraging remotely sensed information to inform spatial models of malaria risk in the 3 months after flooding. We identified clusters of malaria risk emerging in areas (1) that showed the greatest changes in Normalized Difference Vegetation Index from pre- to postflood and (2) where residents were displaced for longer periods of time and had lower access to long-lasting insecticidal nets, both of which were associated with a positive malaria rapid diagnostic test result. The disproportionate risk persisted despite a concurrent chemoprevention program that achieved high coverage. The findings enhance our understanding not only of the spatial evolution of malaria risk after flooding, but also in the context of an effective intervention. The results provide a "proof of concept" for programs aiming to prevent malaria outbreaks after flooding using a combination of interventions. Further study of mitigation strategies-and particularly studies of implementation-is urgently needed.

Seasonal Respiratory Virus Circulation in a Tertiary Care Hospital in Greece

Background: The COVID-19 pandemic caused by the novel SARS-CoV-2 virus affected health care systems and public health worldwide dramatically. Several measures were applied in order to prevent or stop the rapid transmission of the virus and the subsequent disease, such as lockdowns, physical distancing, strictly hygiene, along with travel restrictions. Global population after vaccination programs against COVID-19 were carried out, is facing a “tripledemic” situation threat, with the co-existance of SARS-CoV-2, influenza and RSV. The aim of the present study was to evaluate the co-existence of SARS-CoV-2, influenza and RSV, as well as the correlation with gender, age, Cts and vaccination doses. Methods: A total of 302 patients were included in the study. All patients were admitted to the emergency department of General Hospital Nikea, Piraeus with common upper respiratory tract symptoms and were suspected for COVID-19 disease, between March to July 2022. Patients’ age, gender, vaccination doses, and results from RT-PCR detection for SARS-CoV-2, RSV and Influenza viruses were recorded. Results: 139 were male and 163 female, aged between 18-94 years. Out of the patients included in the study, 206 were vaccinated and 96 were not vaccinated. Among vaccinated patients 97 were male and 109 were female. A percentage of 3.3% had received one vaccination dose, 16.9% two and 47.7% three. Moreover, 88 patients presented infection symptoms; 81 patients had a positive rapid test result. We detected 15 cases of co-infection of SaRS-CoV-2 and RSV and only one case, of co-infection of SaRS-CoV-2 with influenza virus. Conclusions: The majority of patients admitted to the emergency department of GHNP with common upper respiratory tract clinical manifestations were female. A significantly lower rate of co-infection with SARS-CoV-2 and RSV was detected in patients having received 2 vaccination doses, compared to patients having received 3 out of 3 vaccination doses or up to 1 vaccination dose. Ct values for SARS-CoV-2 and RSV pathogens were between 10-17. Co-infection with SARS-CoV-2 and Influenza was detected in only 1 patient.

Point-of-Care Screening for Coeliac Disease in Schoolchildren Reveals Higher Disease Prevalence in Croatia

Coeliac disease (CD) is an immune-mediated inflammatory disease triggered by dietary gluten and related proteins in genetically predisposed individuals. Point-of-care (POC) methods are non-invasive and easily performed tests, which could help to reduce the diagnostic delay of CD. The aim of our study was to determine the prevalence of CD using rapid POC test in first-grade schoolchildren in Zagreb, Croatia. A rapid qualitative immunoassay POC test designed for detection of immunoglobulin (Ig) A and IgG deamidated gliadin antibodies (DGP), as well as total IgA (to identify IgA deficient patients) in whole blood, was used to test healthy children on gluten containing diet. Out of 1404 tested children (51% female), 85 (6.05%) had a positive rapid POC test result and were referred to paediatric gastroenterologist. Finally, 7 children were diagnosed with CD (0.5%). There was no significant difference in children with CD and children with positive POC but negative serology in sex, BMI, or symptoms. However, children diagnosed with CD complained of abdominal pain significantly more often. The prevalence of CD in first-grade schoolchildren was 1:200 (0.5%), higher than in previous studies performed in Croatia. The results imply the possible benefit of IgA and IgG DGP-based POC tests in population screening.

69. Implementation of a Pharmacist-Driven Blood Culture Communication Process in a Non-Profit Community Hospital

Abstract Background Rapid diagnostic testing allows for faster identification of culture results and quicker time to targeted antimicrobial therapy. For this to be effective, however, the clinician needs to understand its capabilities and limitations. Pharmacists are well-positioned to assist providers in interpreting rapid diagnostic test results and in the selection of optimal antimicrobial therapy. This study aims to determine if implementing a process in which pharmacists communicate positive blood culture and rapid diagnostic test results improves time to optimal antimicrobial therapy in a community-based hospital. Methods In November 2020, Mercy Medical Center implemented a new process in which positive blood culture and rapid diagnostic test results are communicated to a pharmacist instead of a nurse on the patient care unit. The pharmacist is responsible for interpreting the results, assessing patient information, and providing the culture results along with drug therapy recommendations to the appropriate licensed independent practitioner. This study was a single-center, pre-post, quasi-experimental study (Pre: November 2019-March 2020; Post: November 2020-March 2021). The electronic medical record was used to identify admitted patients 18 years and older with positive blood cultures in which treatment was provided. Time from culture positivity to optimal antimicrobial therapy was collected and compared pre-post intervention. Secondary outcomes included hospital length of stay and mortality. Results A total of 480 patients were identified during the study period, of which 247 met inclusion criteria (n = 125 in 2019-2020; n = 122 in 2020-2021) with comparable baseline characteristics. There was no statistical difference in time to appropriate therapy between the groups (p = 0.796). Time to optimal therapy was 6.12 hours shorter in the post-intervention cohort (p = 0.0492). No difference was found for both secondary outcomes of hospital length of stay and inpatient mortality (p = 0.2958, p = 0.096, respectively). Conclusion A pharmacist-led blood culture communication process improved the care of hospitalized patients in a non-academic, community-based hospital by shortening time to optimal antimicrobial therapy. Disclosures All Authors: No reported disclosures

Celiac Disease Prevalence Among Children with Dermatologic Pathology: Cross Sectional Study with Clinical Case Series

Background. Celiac disease (gluten enteropathy) is relatively rare disease. However, such patients have higher risk of skin pathology than general the population, and their therapy efficacy is limited by the use of gluten-free diet. Therefore, screening of dermatologic patients on celiac disease may be relevant. Objective. Our aim was to study the prevalence of celiac disease among children with skin pathology. Methods. The study included children hospitalized in dermatology department. Screening for celiac disease included detection in blood serum of antibodies (IgA, IgG, IgM) to tissue transglutaminase via rapid tests. In case of positive result of rapid test, we have repeated the estimation of antibodies (IgA, IgG) to tissue transglutaminase via immunochemiluminescent method with ImmunoCAP technology or via enzyme immunoassay. In case of positive serological test, we have performed HLA typing to determine haplotypes of DQ2 and DQ8, as well as esophagogastroduodenojejunoscopy (EGDJS) with biopsy of the duodenal and jejunal mucosa for further histological verification of the diagnosis. Results. We examined 1,000 children with various dermatologic pathologies. Rapid tests showed positive result in 21 patients (2.1%; 95% C11.3-3.2%). The presence of antibodies to tissue transglutaminase was confirmed via additional serological examination in all cases. HLA-haplotypes DQ2/8 were revealed in all patients with positive rapid test results. Typical form of gluten enteropathy was confirmed in 18/21 patients (86%) according to a histological study, thus, estimated prevalence of celiac disease is 1.8% (95% C11.1-2.8%). Conclusion. The prevalence of celiac disease remains underestimated among children with skin diseases. More studies are needed on the diagnostic features of rapid tests on tissue transglutaminase, as well as the benefits of screening for celiac disease to achieve patient-relevant clinical outcomes of skin pathology with wider gluten-free diet.

Developing sustainable workflows for community pharmacy–based SARS-CoV-2 testing

BackgroundThe coronavirus disease Rapid Antigen Testing Expansion Program (Program) employed a drive-thru model to maximize pharmacy staff and the public’s safety. ObjectivesTo quickly design, implement, and disseminate a pharmacy-based point-of-care testing program during a public health crisis. Practice descriptionCommunity pharmacies in Idaho were engaged in the state’s public health efforts to boost severe acute respiratory syndrome coronavirus 2 testing statewide. Geographic location was a major recruitment factor. Two recruitment periods were held to extend the Program’s reach into more remote underserved communities. Practice innovationProgram and pharmacy staff developed workflows and materials in an iterative process. Pharmacies received testing supplies. Program staff created e-Care plans for documentation and reimbursement and designed a Web portal for state reporting of positive rapid antigen test results. Evaluation methodsTesting data (pharmacy location, patient insurance status, test type and results, number of submitted Medicaid claims) were captured in an online form. ResultsFrom September to December 2020, 13 pharmacies opted into a drive-thru, rapid antigen point-of-care testing and nasal swab for offsite testing program. A total of 2425 tests were performed. Approximately 29.4% of point-of-care tests were positive, and 70.6% required backup polymerase chain reaction confirmatory analysis. Patient insurance breakdown was 72.1% private, 8% Medicare, 11.4% Medicaid, and 8.5% uninsured. On average, pharmacies tested patients an average of 2.3 hours/day and 2.6 days/week. As a group, they provided 77.5 hours of testing per week statewide. Program pharmacies accounted for an average of 5.1% of testing across the entire state at the end of December 2020. ConclusionIndependent community-based pharmacies should be considered as partners in public health initiatives.

Use of fourth-generation rapid combined antigen and antibody diagnostic tests for the detection of acute HIV infection in a community centre for men who have sex with men, between 2016 and 2019.

To assess the use of fourth-generation rapid diagnostic tests in identifying acute infection of Human Immunodeficiency Virus (HIV). BCN Checkpoint promotes sexual health among men who have sex with men (MSM), with a focus on diagnosing HIV early, initiating combined antiretroviral treatment (cART) promptly, and recommending regular repeat testing for those who have tested negative. This cross-sectional study included all test results obtained at the centre between 25 March 2016 and 24 March 2019. The Alere™ HIV Combo (now rebranded to Determine™ HIV Ultra, from Abbott) was used to detect p24 antigen (p24 Ag) and/or immunoglobulin M (IgM) and G (IgG) antibodies to HIV-1/HIV-2 (HIV Ab). Rapid polymerase chain reaction (PCR) confirmatory testing and Western blot (WB) were performed for clients with a positive rapid test result. Confirmed HIV cases were promptly referred to the HIV unit for care and cART prescription. A total of 12,961 clients attended BCN Checkpoint during the study and 27,298 rapid tests were performed. 450 tests were found to be reactive, of which 430 confirmed as HIV-positive, representing a prevalence of 3.32%. Four confirmed cases (0.93%) were detected as "p24 Ag only", nine (2.09%) as "both p24 and HIV Ab" and 417 (96.98%) as "HIV Ab only". The "p24 Ag only" group had a 1-log higher viral load than the other groups and initiated treatment on the following working day. Overall, there were 20 false-positive results (0.07% and 4.44% of total and reactive tests, respectively), of which 10 positive for "p24 Ag only" and 10 for "HIV Ab only". Four Acute HIV Infections (AHI), with very high viral loads, have been detected with the "p24 Ag only" while the HIV Ab were still absent. Referral to the HIV unit and initiation of cART on the following working day contributed to improving persons' health and to reduce HIV transmission chain.

Effective perioperative scoring in orthopedic surgery to prevent Covid-19 infection

BackgroundThe pandemic has placed health-care workers (HCW) under an unprecedented strain where surgeries are being delayed and health care workers’ deaths because of COVID-19 are prominent and causing staff shortages. An effective, fast, and concise approach to preoperative screening is very much needed. Hospitals are suggested to develop their own algorithm to minimize delays and complications. The objective of this study was to optimize HCW safety by developing a working system based on the hospital’s service capability in treating orthopedic surgeries. Methods A retrospective study was conducted involving 305 HCW. Data were collected on the application of a novel elective and emergency orthopedic surgery clinical pathway and scoring method based on questionnaires, and laboratory and radiographic chest examinations for several months to ensure the safety of HCW. HCW COVID-19 status was routinely checked as the indicator of HCW’s safety. Results Mean age of all patients was 47.0 ± 22.41 years. The screening process was done in a series of questionnaires and laboratory examinations, with the majority of patients (82 or 35.9%) having a score of 0. Patients with a score of 3 or more and testing positive for COVID-19 were immediately referred to a hospital having adequate facilities to prevent delays. There were 51 patients (16.7%) with positive rapid test results, and 21 patients (6.8%) with positive PCR tests. There were 4 (1.3%) COVID-19 positive HCW. Conclusions Despite COVID-19 being a new threat, we have shown that developing an effective perioperative clinical pathway could eventually optimize healthcare worker safety.

Hubungan Pemeriksaan Basil Tahan Asam pada Penderita Tuberkulosis Sebelum dan Sesudah Pengobatan Rifampicin Selama 6 Bulan di Rumah Sakit Tingkat III 04.06.01 Wijaya Kusuma Purwokerto

Tuberculosis is a lung infection caused by the bacteria Mycobacterium tuberculosis. Early detection is one of the ways to detect tuberculosis. The first detection of tuberculosis is with the Molecular Rapid Test, which is one of the technologies being developed using GeneXpert. Patients with positive Molecular Rapid Test results will be treated with rifampicin for 6 months, then further screening of Acid-Fast Bacilli microscopically will be carried out to determine whether the patient is still positive for pulmonary tuberculosis or not. The purpose of this study was to determine the relationship between acid-fast bacillus examination in tuberculosis patients with positive molecular rapid test results. This study will be conducted experimentally. The results of calculations using the Wilcoxon Test showed that there was a relationship between TCM examination results and BTA follow-up screening in TB patients after and before rifampicin treatment for 6 months.

Rapid serological tests for SARS-CoV-2 IgG/IgM - not worth attention?

Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome virus 2 (SARS-CoV-2) had spread worldwide since December 2019 and became a pandemic in March 2020. The diagnosis of an active infection is based on the real-time reverse transcriptase-polymerase chain reaction (RT-PCR) from the nasopharyngeal swab specimen. The aim of the current analysis was to assess the usefulness of the rapid serological tests for diagnosing SARS-CoV-2 infections. The rapid serological tests detecting IgG/IgM antibodies for SARS-CoV-2 were voluntarily performed in asymptomatic employees of 2 companies. The examination was conducted at the date and time selected online by the study participants. The testing team consisted of 2 nurses collecting the samples and 1 doctor who interpreted the results. Each positive rapid test result was verified by an RT-PCR examination from a nasopharyngeal swab. The testing kits named Vazyme: 2019-nCoV IgG/IgM Detection Kit (Colloidal Gold-Based) were provided by the employer along with the manual and certificates. The overall interest in testing among employees was below the employer's expectations and reached 30% and 20% in each of the 2 companies, respectively. A total of 516 participants were included in the analysis. Ten positive results of the rapid tests were documented, including 7 for IgM and 3 for IgG antibodies. No positive result was confirmed by the detection of the genetic material of the SARS-CoV-2 by the RT-PCR examination. Herein, the authors demonstrated the uselessness of rapid serological tests performed in asymptomatic volunteers for diagnosing SARS-CoV-2 infections. Int J Occup Med Environ Health. 2021;34(2):203-9.

Clinical presentation of congenital syphilis in a rotavirus vaccine cohort study in Lusaka: a case series

BackgroundDespite an otherwise robust national antenatal clinic program, maternal and congenital syphilis remains an important public health issue in Zambia. This case series reports the clinical presentation of seven infants diagnosed with congenital syphilis in Lusaka, Zambia.Case presentationsThe cases in this series were incidental findings from a cohort of infants enrolled in a rotavirus vaccine immunogenicity study recruiting infants at 6 weeks of age. As part of clinical care for enrolled participants, we screened mothers of children who presented with adverse events of (i) repeated upper respiratory tract infections/coryza, (ii) skin lesions, and (iii) poor weight gain, for syphilis using rapid plasma reagin test. From a cohort of 214 mother–infant pairs enrolled between September and December 2018, a total of 115 (44.4%) of the mothers reported to have not been screened during antenatal care. Of these, four (3.5%) reported to have tested positive; and only two received treatment. Seven out of 57 (26.6%) children meeting the screening criteria had a positive rapid plasma reagin test result. The mean age at diagnosis was 4.5 months (1.3 months standard deviation), and the common presenting features included coryza (6/7), skin lesions (4/7), conjunctivitis (3/7), pallor/anemia (5/7), wasting (2/7), and underweight (5/7). Three of the seven infants were exposed to human immunodeficiency virus. Following diagnosis, all seven cases received standard treatment according to national treatment guidelines. That is, 6/7 cases received inpatient care with benzylpenicillin for 10 days, while 1/7 was treated as an outpatient and received daily procaine penicillin for 10 days.ConclusionThese findings suggest that, though screening for syphilis is part of the standard antenatal care in Zambia, it is not offered optimally. There is urgent need to address programmatic shortcomings in syphilis screening and treatment to avoid long-term sequelae. Additionally, clinicians need to raise their index of suspicion and rule out syphilis when confronted with these clinical symptoms, regardless of the mother’s human immunodeficiency virus status.

Nationwide study of mortality and survival in pregnancy-related streptococcal toxic shock syndrome.

Streptococcal toxic shock syndrome is associated with the highest infection-related maternal mortality rates. We conducted a comparative analysis of the background factors and treatment course between survivors and nonsurvivors to improve our understanding concerning the optimal initial treatment approach for this fulminant disease. This retrospective observational study was conducted based on clinical data collected from two national organizations. Clinical data of patients who died or survived (i.e. background information, clinical course and treatment administered) were collected. Records of 13 dead and 15 surviving patients were collected and analyzed. No statistically significant differences were found between the groups regarding age, parity, season, gestational age or the patients' location at the onset of symptoms. After the initial symptom onset, the survivors received antibiotics more systematically during their first visit to a clinic (P = 0.006). More survivors had received treatment within 1 h of onset of fulminant disease (P = 0.069). The number of fetal deaths was significantly higher in the mortality group (P = 0.003), while the fetal survival number was higher in the group of maternal survivors (P = 0.055). Maternal survivors with nonspecific initial symptoms received early intervention when there was a family history of group A streptococcal infection or a positive rapid antigen test result. Intensive care, including systemic antibiotic administration, may contribute to maternal survival when administered immediately (within 1 h) after the fulminant streptococcal toxic shock syndrome onset. Eliciting a family history of streptococcal infection and conducting a rapid antigen test can identify the patients needing early intervention.

Rapid diagnostic tests for Plasmodium vivax malaria in endemic countries.

Rapid diagnostic tests for Plasmodium vivax malaria in endemic countries.