Three patients developed severe, incapacitating diarrhea after antibiotic administration. Presenting features included abdominal discomfort, hematochezia, and hypokalemia from voluminous diarrhea. Roetgenographic studies in 1 patient were normal and proctoscopic examinations in 2 patients failed to show antibiotic-associated colitis. Stool cultures were negative. Despite cessation of antibiotics and symptomatic therapy, the diarrhea continued. After the administration of oral tetracycline, the diarrhea stopped without recurrence even after the tetracycline was discontinued. These clinical results suggest that patients with antibiotic-associated diarrhea may benefit from tetracycline when standard medical therapy fails.
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mBio
January 2025
Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA.
Unlabelled: Mutations affecting flagellin (FliC) have been shown to be hypervirulent in animal models and display increased toxin production and alterations in central metabolism. The regulation of flagellin levels in bacteria is governed by a tripartite regulatory network involving , , and , which creates a feedback system to regulate flagella production. Through genomic analysis of clade 5 strains (non-motile), we identified they have jettisoned many of the genes required for flagellum biosynthesis yet retain the major flagellin gene and regulatory gene .
View Article and Find Full Text PDFmSphere
January 2025
Department of Food Science and Technology and Nebraska Food for Health Center, University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
Treatment with antibiotics is a major risk factor for infection, likely due to depletion of the gastrointestinal microbiota. Two microbiota-mediated mechanisms thought to limit colonization include the conversion of conjugated primary bile salts into secondary bile salts toxic to growth and competition between the microbiota and for limiting nutrients. Using a continuous flow model that simulates the nutrient conditions of the distal colon, we investigated how treatment with 6 clinically used antibiotics influenced susceptibility to infection in 12 different microbial communities cultivated from healthy individuals.
View Article and Find Full Text PDFJ Inflamm (Lond)
January 2025
Department of Morphology, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil.
Clostridioides difficile, a spore-forming anaerobic bacterium, is the primary cause of hospital antibiotic-associated diarrhea. Key virulence factors, toxins A (TcdA) and B (TcdB), significantly contribute to C. difficile infection (CDI).
View Article and Find Full Text PDFBackground infection (CDI) is a significant healthcare concern, marked by its rising prevalence and associated morbidity and mortality. However, there is limited data on the epidemiology of CDI in the eastern region of India. Objectives The study aims to determine the incidence of CDI among adult patients admitted to the inpatient department of a tertiary care hospital and identify the risk factors associated with CDI.
View Article and Find Full Text PDFInfect Dis Clin Microbiol
December 2024
Department of Medical Microbiology, Giresun University School of Medicine, Giresun, Türkiye.
Objective: is one of the leading causes of antibiotic-associated diarrhea. Recurrent infection (rCDI) is significant because of prolonged hospital stays, morbidity, and additional costs. Our study aimed to examine the characteristics of infections and investigate factors associated with recurrence.
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