CONDITIONAL PATHOGENS AND DIARRHEAGENIC ENTEROBACTERIA: CITROBACTER, KLEBSIELLA, ENTEROBACTER AND THEIR CLINICAL SIGNIFICANCE; VIRAL DIARRHEAS (ROTAVIRUSES AND ADENOVIRUSES): ASSOCIATED DISEASES AND LABORATORY DIAGNOSIS

Abstract

Conditional pathogenic enterobacteria, including Citrobacter, Klebsiella, and Enterobacter, are normally part of the human intestinal microbiota but can cause gastrointestinal and systemic infections under certain conditions, such as immunodeficiency or disruption of gut flora. These bacteria are associated with diarrhea, urinary tract infections, wound infections, and sepsis. Accurate laboratory diagnosis involves specimen collection, microscopic examination, culture on selective media, biochemical identification, and antimicrobial susceptibility testing. Viral agents, including rotaviruses and adenoviruses (serotypes 40 and 41), are major causes of viral gastroenteritis, particularly in children, leading to watery diarrhea, vomiting, fever, and dehydration. Laboratory confirmation is achieved through antigen detection, PCR, and, in some cases, electron microscopy.This study emphasizes the clinical importance of both bacterial and viral enteropathogens and highlights the role of comprehensive laboratory diagnostics for effective treatment, infection control, and epidemiological monitoring.