DIPHTHERIA

Diphtheria, caused primarily by the toxin-producing bacterium Corynebacterium diphtheriae, remains a significant cause of morbidity in regions with suboptimal vaccination coverage. This article examines the molecular mechanisms of the diphtheria toxin and its systemic effects, particularly myocarditis and neuropathy. We provide a comprehensive review of the clinical presentation, ranging from the hallmark "bull-neck" appearance and pseudomembrane formation to cutaneous manifestations. Furthermore, the paper evaluates the shift in diagnostic gold standards, comparing the traditional Elek test with modern PCR-based detection of the tox gene. The findings emphasize that despite the success of the DTaP/Tdap vaccines, clinical vigilance is essential for early antitoxin administration.Once considered a disease on the brink of eradication, diphtheria has seen a resurgence in the 21st century. This study analyzes the epidemiological shifts contributing to recent outbreaks, including the breakdown of public health infrastructure in conflict zones and the rise of vaccine hesitancy in developed nations. By synthesizing data from recent clusters, we identify a trend of "immunity gaps" in adult populations whose childhood protection has waned. The article advocates for a multi-pronged approach to prevention, focusing on improving booster dose compliance and strengthening global surveillance systems. Our analysis suggests that without renewed international focus on equitable vaccine distribution, diphtheria will continue to pose a threat to global health security. Diphtheria is a serious acute infectious disease caused by toxigenic strains of Corynebacterium diphtheriae.It is primarily a disease of the upper respiratory tract but may also affect the skin and other organs.Before the introduction of vaccination, diphtheria was a major cause of childhood mortality worldwide Despite global immunization programs, diphtheria continues to occur in developing countries and among unvaccinated populations.The disease is characterized by the formation of a pseudomembrane and systemic toxic effects Early diagnosis and prompt treatment are critical to prevent fatal complications.