Cases Of Diphtheria Research Articles

Cutaneous diphtheria from 2018 to 2022: an observational, retrospective study of epidemiological, microbiological, clinical, and therapeutic characteristics in metropolitan France.

The incidence of diphtheria has been rising over the past decade, particularly in its cutaneous form. A clinical review of the case series was therefore required. We reviewed the epidemiological, clinical, microbiological and therapeutic data of cutaneous diphtheria cases, in adult patients living in metropolitan France with a skin sample positive for corynebacteria of the diphtheriae complex between 2018 and 2022. Of the 132 cases identified, 63 met the inclusion criteria. The mean age was 53.8 years, 68.3% were men and 56.7% had travelled outside mainland France. Immunization rate was 44%. Lesions involved the lower limbs (86.9%), corresponded to ulcerations in 82% of cases. Two species were identified in the study: C. diphtheriae (77%) and C. ulcerans (23%). 39% were toxigenic. Other bacteria were present in 88.9% of cases: Staphylococcus aureus (54.7%) and Streptococcus pyogenes (49.1%). 17.5% of clinicians ignored the presence of Corynebacteria of the diphtheriae species complex. Clinicians seem to be unfamiliar with this disease due to under-reporting and a lack of knowledge and awareness among clinicians, and rarely mention it, which explains the frequent failure to comply with French recommendations. Clinical data are consistent with the literature. Continued epidemiological surveillance, increased vaccination coverage in high-risk populations and better information of clinicians are essential to prevent and control this preventable disease.

The resurgence of diphtheria in Zinder, Niger

BackgroundDiphtheria is a re-emerging bacterial disease in developing countries with low vaccination coverage. ObjectivesThis is a descriptive cross-sectional study of diphtheria cases reported to the DRSP/Zinder from March 14, 2022 through June 26, 2023. MethodsIt includes cases reported through epidemiological surveillance and data on patients hospitalized in the infectious and tropical diseases department of the Zinder National Hospital (SMIT). ResultsA total of 32 patients were included in this study. The median age was 12 years [4–22 years]. Key symptoms included dysphagia and odynophagia (100 %), false membranes (84.4 %), fever (46.9 %), thrombocytopenia (39.3 %), cervical lymphadenopathy (37 %), respiratory distress (15.6 %), epistaxis (12.5 %), gingival bleeding (9.4 %), agitation (6.2 %) and paresis (3.1 %). Renal function was altered in 74 % of cases. Diagnostic confirmation was procured through culture on oropharyngeal swabs. Corynebacterium diphtheriae was isolated in 26.31 % (5/19) of cases. Patients were treated with macrolides and diphtheria antitoxin. The case fatality rate was 31.2 %. Poor prognostic factors included gingival bleeding (p = 0.0262), respiratory distress (p = 0.0374), and thrombocytopenia below 50,000 platelets/mm3 (p = 0.0020). ConclusionDiphtheria is a deadly re-emerging disease. The fight against this condition necessitates improved vaccination coverage.

Clinical presentation and outcome of diphtheria in health facility in North-East Nigeria

Abstract Background Frequent outbreak of diphtheria occurs in Nigeria and some developing nations due to poverty, poor environmental sanitation, and vaccination coverage. Aim To determine the clinical presentation and outcome of diphtheria in cases admitted in a Yobe Specialist Hospital Potiskum, Yobe State, North-East Nigeria. Methods This is an observational study involving consecutive cases of diphtheria admitted in diphtheria treatment unit (DTU) in the hospital. Cases were admitted from 27th May to 30th October 2023. Results A total of 640 patients were admitted with median age of 9 (1–62), with males constituting 350 (54.6%). Only 9 (1)% of patients had vaccination. Common clinical features included pseudomembrane (90.7%), fever (79.7%), neck pain (78.3%), gross cervical lymphadenopathy (GCL; 69.1%), and sore throat (44.2%). The case fatality rate was 7%, higher in < 5 years (8.4%) than 5–14 years (7.4%) and ≥ 15 years (2.2%) respectively. Independent risk for fatality included delay in presentation (adjusted odd ratio (AOR) = 1.21, 95% confidence interval (CI) [1.10, 1.42], p < 0.001), vomiting (AOR = 3.6, 95% CI [1.36, 9.6], p = 0.01), bleeding from orifices (AOR = 3.76, 95% CI [5.76, 6.98], p < 0.001), blood transfusion (AOR = 8.12, 95% CI [3.34, 19.74], p < 0.001), and diphtheria antitoxin (DAT) administration (AOR = 3.17, 95% CI [1.37, 7.25], p = 0.07). Conclusion Clinical presentation was consistent with diphtheria. Risk of fatality included vomiting, bleeding from orifices, anemia necessitating blood transfusion, delay in presentation, and DAT administration.

Vaccine-preventable diseases in migrants to Europe: a systematic review

Abstract Migrant populations in Europe are at increased risk of under-immunisation and therefore likely to be at high risk of vaccine-preventable diseases (VPD), yet the relationship between migration and VPD incidence is not fully understood. This study aimed to explore the prevalence of VPDs in migrant populations in Europe and to define at-risk groups. Following PRISMA guidelines, Embase, MEDLINE and Global Health were searched for peer-reviewed papers published from 1st January 2010. Inclusion criteria comprised primary research on VPD cases (measles, mumps, rubella, diphtheria, pertussis, tetanus) among migrants to/within EU/EEA and Switzerland. We defined migrants as foreign-born nationals. Forty-seven eligible studies from 15 EU/EEA countries and Switzerland were included, with a total of 1357 migrant VPD cases reported. Analysis revealed 1357 migrant cases across measles (28 publications; 926 cases), pertussis (9; 267 cases), mumps (9; 107 cases), diphtheria (11; 67 cases), rubella (2; 6 cases imported from Romania and Pakistan), tetanus (2; 2 cases). Over-representation of measles cases was observed among migrant children and adolescents, predominantly from the WHO Europe region (particularly Bulgaria, Bosnia and Herzegovina and Serbia). Migrants of East African origin were over-represented among diphtheria cases. This study underscores the association between migration and VPD cases in EU/EEA and Switzerland, establishing a clear association between European migrant children and adolescents in measles outbreaks, and adult migrants from East Africa in diphtheria cases. This study suggests strengthening systems for targeted catch-up vaccination for migrants is imperative upon arrival in European countries to align them with national schedules, alongside the need to improve data collection and surveillance systems to inform effective public health interventions. Key messages • Migrant populations in Europe face heightened risk of vaccine-preventable diseases and need to be better incorporated into catch-up vaccination initiatives on arrival. • Improved data collection and surveillance systems are crucial for informing effective public health interventions targeting migrant populations.

Community-led diphtheria vaccination campaign to manage a diphtheria outbreak in a remote Aboriginal community.

In 2022, five cases of diphtheria were identified in and around Wujal Wujal, a discrete Aboriginal community in Far North Queensland. This prompted a mass diphtheria vaccination campaign in the community which increased the proportion of residents aged ≥ 14 years receiving a diphtheria containing vaccine in the prior twelve months from 5% to 74%. No further cases were detected in the subsequent twenty-two months.

Risk factors of diphtheria outbreak in damt district of Al Dhalea Governorate, 2023 -Yemen: a case–control study

BackgroundIn Yemen, diphtheria has become an important health problem since 2017 when diphtheria re-emergence as a consequence of war and the collapse of the health system. In 2023, there has been a 57% increase in diphtheria cases compared to 2021 and 2022. Damt district of Al Dhalea Governorate had the highest reported cases for year 2023. The study aims to determine the risk factors associated with diphtheria outbreak in Damt District.MethodsA retrospective matched case–control (1:2) was used. All confirmed cases based on the WHO case definition reported from Damt district during 2023 were considered cases. Two age-matched (± 5years) neighborhood controls were recruited per case. A pretested questionnaire was used for collecting data during household interviews including demographic and household characteristics, knowledge of diphtheria, vaccination status, contact with a case of diphtheria, and travel history. Frequency and proportion for quantitative and median with interquartile range (IQR) for quantitative variables. Chi-square and Mann–Whitney tests to compare the distribution of categorical and numerical variables between cases and controls. Univariate and multivariate conditional binary logistic regression, and Adjusted Odds ratio (AOR) with a 95% confidence interval at P < 0.05 were used to identify risk factors.ResultsA total of 118 cases and 236 controls were enrolled, 56% were females (63% of cases vs. 53% of controls). The median (IQR) age was 14 (9,22) years for cases vs 12(7,23) of control, it was significantly higher for females than males in the case group: (16(10,29) Vs 10(6,18), P < 0.001) and control group: (15(8,25) vs 12(7,18), p-value = 0.022). Partial vaccination status AOR = 13.7(6.1–31.1), P-value < 0.001), contacts with a case of diphtheria AOR = 8.5(2.3–31.0), P value < 0.001) and Female gender, AOR = 3.3(CI; 1.1–9.5, P value = 0.029), were the main risk factors.ConclusionsPoor vaccination and contact with a case of diphtheria were the main contributors to diphtheria in the Damt district particularly among adult females. Increasing the vaccination coverage with a diphtheria-containing vaccine through routine immunization as well as tetanus-diphtheria vaccine for childbearing age females along with community awareness regarding protection measures during home care of diphtheria cases. Vaccination services as well as gender barriers related to Td vaccination should be investigated.

Reviewing the Pillars of Immunization: Essential Vaccines and Their Public Health Benefits.

Vaccination has lowered, across the globe, morbidity and mortality from infectious diseases. It is considered one of the basic principles of preventive health measures. The World Health Organization’s Expanded Programme on Immunization defined vaccinations that are required and their tremendous benefits to public health, which are discussed in this review article. These involve the vaccinations taken against most communicable diseases, such as COVID-19, polio, measles, rubella, pneumococcal diseases, rotavirus, human papillomavirus, tuberculosis, Haemophilus influenzae type B, diphtheria, pertussis, and tetanus. The article points out that quite a number of vaccinations have been proven effective and safe and if administered, could prevent serious disease, disability, and death. For example, vaccination against measles has been rated to be vital in the containment of outbreaks within nonimmune populations, while the DTP vaccine is paramount in decreasing the cases of pertussis, tetanus, and diphtheria. The effect of vaccination can be exemplified by the dramatic decrease in the occurrence of serious bacterial contagion in children since the introduction of conjugate vaccines against Hib and pneumococcus. Notwithstanding these successes, there are persistent obstacles, such as vaccine hesitancy, misinformation, and inequities in access to vaccines, all heightened by the COVID-19 pandemic. The article discusses the global impact of vaccination efforts under siege and appeals for further public health efforts toward the attainment of these goals.

Eleven-Year Report of High Number of Diphtheria Cases in Children in East Java Province, Indonesia.

A high incidence of diphtheria cases in children in East Java province, Indonesia, has been observed since the beginning of this century. Despite many efforts, the outbreaks continue. This study aims to explain the high incidence of diphtheria in children in East Java province since 2013. This cross-sectional surveillance report-based study used data from 38 districts in East Java since 1 January 2013. Collected data included demographics, clinical information, additional examinations, immunization history, and close contact management. Over eleven years, there were 4009 diphtheria patients, of whom 2921 (72.86%) were under 18 years of age. Boys (59.77%) outnumbered girls, and the most common age category was >60-144 months (51.66%). Most cases had incomplete or zero immunization (76.16%). Tonsillopharyngeal diphtheria was the most common type (69.60%). The five top districts with the most cases were Surabaya, Sidoarjo, Kabupaten Blitar, Kota Malang, and Kabupaten Malang. The eleven-year case fatality rate (CFR) was 2.36% (69/2921). This study shows that diphtheria cases in children and adolescents in East Java have consistently been high, and low immunization coverage might still be the leading cause. There has also been a shift in the district distribution. Diphtheria outbreaks require complete and sustainable efforts, not just outbreak response immunizations.

Rare manifestations of cutaneous diphtheria: a case report

BackgroundThis case report presents an exceptionally rare and atypical presentation of diphtheria in a 17-year-old female of Hausa ethnicity residing in an area with an elevated incidence within Kano State, Nigeria. By the end of 39th epidemiological week of 2023, only two cases of cutaneous diphtheria have been reported among 5,811 cases managed at MMSH diphtheria treatment center (DTC), representing approximately 0.035% of all diphtheria cases during that time period.Case presentationA 17-year-old Hausa female presented with a 3-day history of throat discomfort, malaise, and muffled speech. Physical examination revealed a pseudomembrane covering the tonsillar pillars, grade 3 tonsillar enlargement, and an unusual genital manifestation characterized by extensive vulval edema, severe pain, and a large, greyish patch extending into the vaginal introitus. Her medical history was significant for recent exposure to diphtheria and the emotional impact of her sibling's death from the same disease. Diagnostic tests, including throat swab culture and histocytology, confirmed diphtheria in the throat and vulvovaginal regions. The patient was promptly initiated on diphtheria antitoxin, Azithromycin, and innovative sitz baths with hydrogen peroxide. After 4 days of Sitz bath therapy, complete pseudomembrane clearance was observed, and the patient's symptoms resolved.ConclusionThis case underscores the complexity of diphtheria presentations, particularly with rare pseudomembranes in both throat and vaginal regions. The successful management, combining traditional and innovative therapies, highlights the importance of recognizing and addressing unusual manifestations promptly. The potential role of auto-inoculation and the efficacy of interventions like hydrogen peroxide sitz baths warrant further investigation. Overall, this case contributes to the understanding of diverse diphtheria presentations, guiding future clinical strategies for management of diphtheria cases and emphasizing the imperative of comprehensive vaccination efforts.

Profiles of diphtheria cases in children in Hasan Sadikin Hospital, West Java

Background Diphtheria cases continue to be reported in Indonesia, which has long been one of the countries with the highest number of diphtheria cases worldwide. One of Indonesia's province with the highest annual diphtheria cases is West Java. Dr. Hasan Sadikin General Hospital (RSHS) is one of the tertiary referral hospitals in Bandung, West Java, that treats several diphtheria cases annually. No study focused on the clinical characteristics of diphtheria cases in children admitted to RSHS between 2017 and 2021 yet. Therefore, this study sought to analyze that. Objective To find out the profiles of children &lt; 18-year-old with diphtheria admitted in RSHS between 2017-2021. Methods This descriptive, cross-sectional study reviewed the medical records of diphtheria patients 0 to 18-year-old who were admitted to RSHS between year 2017 and 2021. Results Out of 45 subjects, 76% were males. The median of age was eight years old, ranging from 2 to 17 years. Most patients lived in urban areas and had normal anthropometry status, although some showed abnormal findings. The data showed that 44% had more than 3 days of onset until admission to the hospital, and the median length of stay was 9 days. The clinical characteristics showed that 91% of patients had pseudomembrane, also present with cough, common cold, hoarseness, stridor, and bull’s neck. As many as 44% of patients did not have complete basic immunization status. Complications found were airway obstructions, myocarditis, and sepsis, and 2 deaths were reported. Conclusion Pseudomembrane was found in the majority of patients. Most patients were over five years of age, and almost half number of the patients did not have complete basic immunization status, indicating the need for improved immunization and booster coverage.

A Brief History of Polyclonal Antibody Therapies Against Bacterial and Viral Diseases Before COVID-19.

The use of the serum or plasma of patients or animals who have recovered from an infectious disease, or had been immunized with a relevant antigen, to treat or prevent the same infection in others began in the late 1880s when French and German scientists uncovered, one step at a time, several of the elements of the immune system's response to infection. A key finding was that the damage caused by some bacteria depends upon their secreted toxins which can be neutralized by biologic agents. Antitoxins to diphtheria and tetanus began to be manufactured in large animals in France, Germany, and the US in the 1890s and were soon being used worldwide. The impact of diphtheria antitoxin on childhood mortality was profound. Shortly after the development of antitoxins, convalescent serum began to be used for its anti-bactericidal properties thus addressing serious infections caused by non-toxin-producing organisms. The effectiveness of antitoxins and antisera was demonstrated by examining mortality rates in hospitals before and after the introduction of antitoxins, by comparisons of treated and untreated patients, by comparing early and late treatment and dosage, by examining vital data mortality trends, and by several randomized and alternate assignment trials. Antitoxins continue to have a role in the rare cases of diphtheria and other conditions largely eradicated by immunization, but serum therapy nearly disappeared from the medical armamentarium with the development of antibiotics in the 1940s. Inasmuch as new human pathogens are now emerging with unprecedented regularity as seen in the recent COVID-19 pandemic, and because specific therapies are unlikely to be available for them, plasma-based antibody therapies are likely to again carve out a niche in infectious disease control.

Infection by a multidrug-resistant Corynebacterium diphtheriae strain: prediction of virulence factors, CRISPR-Cas system analysis, and structural implications of mutations conferring rifampin resistance.

Cases of diphtheria, even in immunized individuals, are still reported in several parts of the world, including in Brazil. New outbreaks occur in Europe and other continents. In this context, studies on Corynebacterium diphtheriae infections are highly relevant, both for a better understanding of the pathogenesis of the disease and for controlling the circulation of clones and antimicrobial resistance genes. Here we present a case of cutaneous infection by multidrug-resistant Corynebacterium diphtheriae and provide its whole-genome sequencing. Genomic analysis revealed resistance genes, including tet(W), sul1, cmx, rpoB2, rbpA and mutation in rpoB. We performed phylogenetic analyzes and used the BRIG to compare the predicted resistance genes with those found in genomes from other significant isolates, including those associated with some outbreaks. Virulence factors such as spaD, srtBC, spaH, srtDE, surface-anchored pilus proteins (sapD), nonfimbrial adhesins (DIP0733, DIP1281, and DIP1621), embC and mptC (putatively involved in CdiLAM), sigA, dtxR and MdbA (putatively involved) in post-translational modification, were detected. We identified the CRISPR-Cas system in our isolate, which was classified as Type II-U based on the database and contains 15 spacers. This system functions as an adaptive immune mechanism. The strain was attributed to a new sequence type ST-928, and phylogenetic analysis confirmed that it was related to ST-634 of C. diphtheriae strains isolated in French Guiana and Brazil. In addition, since infections are not always reported, studies with the sequence data might be a way to complement and inform C. diphtheriae surveillance.

Respiratory diphtheria in the time of Omicron.

Diphtheria is a potentially fatal bacterial infection caused by toxin-producing strains of corynebacteria, most often Corynebacterium diphtheriae and less commonly Corynebacterium ulcerans. Incidence of the disease has fallen significantly since the introduction of vaccination programs; it is now rare in countries with high vaccination coverage such as Australia. This article presents the most recent respiratory cases of diphtheria in two children in New South Wales-the first locally acquired childhood cases in Australia in 30 years-and discusses potential contributing factors. These encompass the lack of clinical awareness and the delays in laboratory diagnosis in regional laboratories. The cases also highlight the problem of vaccine hesitancy and the role that primary carers play in addressing these anxieties. While clinical management of the cases progressed well, factors in the public health responses were complicated by access to appropriate care and by delays in antibiotic sensitivity profiles. The public health response to these cases raises important considerations for clinicians and public health practitioners, including preparedness for rare and re-emerging diseases, the need for culturally safe environments and the importance of addressing vaccine hesitancy. Preparedness requires consideration of the capacity of regional health systems with fewer resources and of how public health departments can support response to multiple crises. Preparedness also relies on access to necessary diagnostic laboratory resources, on up-to-date guidelines, and on maintaining awareness among clinicians for these rare infections.

Case Report: A 5 Yea kan r Old Girl with Diphtheria

Background: Diphtheria is an acute infectious disease caused by Corynebacterium diphtheriae. It is characterized by the formation of pseudomembranes in the tonsils, pharynx, and/or nasal cavity, which can lead to severe complications such as airway obstruction, myocarditis, and paralysis of the palate muscles. Aims: This study aims to detail the clinical course and treatment of a pediatric diphtheria case, emphasizing the importance of early diagnosis and appropriate therapeutic interventions. Methods: The case of a 5-year-old girl presenting with a 3-day history of fever at K.R.M.T Wongsonegoro Hospital is described. Clinical evaluation, including history, physical examination, and supportive tests, led to a diagnosis of diphtheritic tonsillitis. Findings: The patient exhibited classic symptoms of diphtheria, including sore throat, fever, and the presence of a dirty, greyish-white pseudomembrane on the tonsils. The membrane extended to adjacent structures, causing a condition known as bullneck. The treatment protocol included the administration of diphtheria antitoxin (DAT), antibiotics, antipyretics, corticosteroids, and symptomatic management. Conclusion: Diphtheria remains a serious infectious disease requiring prompt diagnosis and treatment to prevent complications. The case highlights the importance of early intervention, continuous monitoring, and the evaluation of therapeutic efficacy to improve patient outcomes. Implications: This study underscores the necessity of vigilant clinical practices in managing diphtheria cases, particularly in pediatric patients, to reduce morbidity and mortality.

Comparison of Diphtheria Cases in Children Before and During the Pandemic Era in Surabaya, Indonesia: A Study of Six-Year Data.

Introduction Indonesia has a high incidenceof diphtheria, especially in children. Surabaya has become a government regional reference center, as it is the capital of East Java province, which has the highest rate of diphtheria across the 38 regions. The aim of this study is to report our six-year pediatric diphtheria data, focusing on comparisons between before and during the pandemic era. Method This surveillance report was collected from community health centers and hospitals throughout Surabaya from January1,2017toDecember 31, 2022. Collected data included demographic characteristics, clinical and laboratory aspects, the health centers, immunization history, and management. As per Indonesian guidelines, the diagnosis of diphtheria in this country requires a positive microbiological culture or approval from the National Experts on Diphtheria Committee. Results In total, there were 112 cases, of which 89 were found before the pandemic era. Although the number of cases declined during 2020-2022, the predominant age group, the immunization status, and the most common type of diphtheria remained consistent with pre-pandemic trends. Most cases had incomplete immunization or unimmunized children (67.8%), with the age group of 5-12 years old (44.6%), and with tonsillar diphtheria (83%). The case fatality ratio was 1.8%. Regarding the biovar of Corynebacterium diphtheriae, gravis is the most frequent finding. Conclusion The incidence of diphtheria cases in children in Surabaya was significantly lower during the pandemic. Although immunization coverage was not better, preventive measures during the pandemic may have played a role. Most patients did not have complete immunization histories during the study period, and the predominant type was tonsillar diphtheria. Since the trend in 2021-2022 increased, routine surveillance is essential.

Determinants of mortality in relationship between clinical and laboratory characteristics with the outcomes of children with diphtheria: A cross-sectional study at a national hospital of Sumatra region in 2020- 2023.

In 2017, diphtheria outbreaks occurred in several provinces in Indonesia; however, the epidemiological data in the country is limited. The aim of this study was to determine the association between clinical findings and laboratory parameters associated with mortality of children with diphtheria. A retrospective cohort study was conducted at Haji Adam Malik General Hospital, Medan, Indonesia, covering diphtheria patients from January 2020 to December 2023. All patients aged 1-18 years clinically diagnosed with diphtheria were considered eligible. The associations between demographic characteristics, clinical features, immunization status, complications, and laboratory profiles with mortality were determined using Fisher's exact test, and the odds ratio (OR) with a 95% confidence interval (95%CI) was calculated. Our data indicated that the clinical characteristics of myocarditis (p=0.005) and airway obstruction (p=0.003) were associated with mortality. There was also a significant association between thrombocytopenia (p=0.020) and mortality in diphtheria patients. Patients with airway obstruction were 13 times more likely to have an increase in mortality compared to patients without airway obstruction. This study highlights that clinical and laboratory characteristics could be associated with in-hospital mortality of diphtheria cases, and therefore, pediatricians should be aware of the presence of those characteristics to prevent the mortality of the patients.

The Battle against Diphtheria: Nigeria's Ongoing Struggle

Abstract:: Corynebacterium diphtheriae is a Gram-positive, rod-shaped, nonmotile bacillus. Lysogenic strains carry the diphtheria toxin gene (tox) on corynebacteriophages. It's categorized into biotypes and lysotypes based on colony morphology and phage sensitivity. The disease involves the upper respiratory tract, causing symptoms like fever and painful throat, with severe cases forming airway-blocking pseudomembranes [1-3]. Different types of diphtheria exist; incomplete immunization and poor healthcare facilities increase the risk. Diphtheria is treated with diphtheria antitoxin administered intravenously or intramuscularly, along with antibiotics. Timely treatment improves outcomes and reduces transmission. Lifetime immunity is achieved through a three-dose primary series during infancy and booster shots during childhood and adolescence [4]. : Since epidemiological week 26, concluding on July 2, 2023, Nigeria has witnessed a significant surge in diphtheria cases spanning multiple states. Between June 30 and August 31, 2023, 5,898 suspected cases were documented across 59 Local Government Areas (LGAs) in 11 states. In week 34, ending on August 27, 2023, 234 suspected cases were reported from 20 LGAs in five states, with one laboratory-confirmed case out of 22 samples collected. Among these cases, 18 were linked through epidemiological analysis, and 141 were categorized as clinically compatible [5]. Diphtheria incidence has decreased due to widespread DTaP vaccination in children, but declining childhood immunity necessitates booster shots. Recent outbreaks in some nations emphasize the need to maintain high vaccination rates. In Nigeria, a 2022 outbreak resulted in over 600 tragic deaths and around 14,000 suspected cases, a stark contrast to the 2011 outbreak with only 98 reported cases [6]. : In response to the ongoing diphtheria outbreak in Nigeria, the country has implemented several strategies and precautions to combat the disease. Here are the key measures being taken

Factors Associated with the Outcome of 2023 Diphtheria Outbreak in Jigawa State, Nigeria: A Retrospective Review of the Surveillance Data.

The objective of this study was to identify the factors associated with the outcome of the 2023 diphtheria outbreak in Jigawa State, Nigeria. A descriptive cross-sectional study was conducted amongst all line-listed diphtheria cases reported from Jigawa State, Nigeria, using the 2023 Integrated Disease and Surveillance Response line list of cases that met the World Health Organization case definition of diphtheria. A total of 245 line-listed cases from January 2023 to December 2023 met the criteria for inclusion in the study. Data were analysed using IBM SPSS version 22.0 with a P value set at ≤5%. Binary logistic regression was used to identify the independent predictors of the outcome of the 2023 outbreak. The maximum age of the line-listed cases was 39 years, and the minimum was 1 year with a median of 8 (interquartile range = 5-8) years. More than two-thirds (68.2%) of the cases were ≥5 years of age. More than one-third of the cases (39.6%) were from the northeast senatorial zone of the state. Out of the total 245 cases, 14 died of the disease representing a case fatality rate of 6%, and an attack rate of 3.4 per 100,000 populations. The majority of the cases (95.5%) had fever, cough (81.2%), pharyngitis (86.9%), tonsillitis (96.7%) and laryngitis (82.0%). More diphtheria-related mortalities were recorded amongst cases <5 years of age (7.7%), female cases (5.9%), rural residence (7.7%) and cases from the northeast senatorial zone (8.2%) of the state. Significantly higher mortalities (8.8%, P = 0.003) were recorded amongst cases with nasopharyngitis. The odds of diphtheria-related mortality were higher amongst cases who presented clinically with nasopharyngitis and were 4 times more likely to die (adjusted odds ratio = 3.9; 95% confidence interval = 1.1-14.3) compared with those with no nasopharyngitis. Significantly higher mortalities were recorded amongst diphtheria cases whose samples were not taken, and those with nasopharyngitis. These findings underscored the importance of improved immunisation uptake, early and prompt case detection, investigation and proper management.

EPIDEMIOLOGICAL INVESTIGATION OF A FATAL CASE OF DIPHTHERIA IN A RESIDENT OF KYIV OBLAST

Ukraine still has diphtheria. This infection is developed with toxins secreted by pathogens of three Corynebacteria species, such as Corynebacterium diphtheria, Corynebacterium ulcerans, and Corynebacterium pseudotuberculosis. In January 2024, for the first time in recent decade, a fatal case of diphtheria in a resident of the Kyiv oblast was registered in Ukraine. The results of laboratory testing showed the toxigenic microorganism Corynebacterium ulcerans. The diagnosis was established based on the results of the pathological and anatomical autopsy and confirmed by laboratory testing during the examination of sectional samples. When a woman sought medical attention with certain clinical signs, medical care personal did not collect biological samples from the patient for testing on the causative agents of respiratory diseases of viral or bacterial origin, and the primary diagnosis did not contain information about the warnings of diphtheria. This indicates a low alertness of doctors regarding the possibility of the occurrence and spread of diphtheria. The anti-vaccination attitude of the population and migration processes under martial law contribute to a decrease in the level of immunization in the Kyiv oblast and pose a threat to diphtheria outbreaks.

Reidentification and determination of drug susceptibility of Corynebacterium diphtheriae and Corynebacterium ulcerans strains isolated from clinical samples in 2023 in Poland.

Despite the fact that the last cases of fully-symptomatic diphtheria were recorded in Poland in 1996 and 2000, infections caused by non-toxin-producing strains of Corynebacterium still occur. According to the epidemiological reports from ECDC in the second half of 2022, there was an increase in the number of diphtheria cases in European Union countries. As a result, the current issue becomes the appropriate preparation of microbiological laboratories for the diagnosis of Corynebacterium microorganisms. Reidentification of diphtheria bacilli isolated from clinical samples and to assess the drug susceptibility of C. diphtheriae strains isolated in Poland. The subject of the research were 18 strains isolated from clinical samples in Poland in 2023. Microbiological and genetic methods were used for the reidentification of the strains. Drug susceptibility was assessed using the disk diffusion method, following the new EUCAST recommendations effective from 2023. It was confirmed that all examined strains belonged to the genus Corynebacterium. It was de-monstrated that C. diphtheriae strains proved to be susceptible to increased exposure to benzylpenicillin and cefotaxime. Results obtained using ciprofloxacin allowed categorizing the strains into the intermediate susceptibility category WZE, except for one strain which was resistant to this antibiotic. All tested bacterial strains were susceptible to erythromycin. The C. ulcerans strain exhibited a similar antibiotic resistance profile to penicillin, cefotaxime, and ciprofloxa-cin, with additional detection of resistance to clindamycin. The toxigenicity of the tested strains was excluded. Based on epidemiological data regarding the emergence of new cases of infections caused by Corynebacterium strains, it is advisable to prepare theoretically and practically laboratories for diagnostics to detect potentially toxigenic diphtheria bacilli. Effective methods for the microbiological diagnosis of diphtheria bacilli are available. It is recommended to monitor the susceptibility to antimicrobial agents in all C. diphtheriae isolates.