نتایج جستجو برای: toxigenic
تعداد نتایج: 3725 فیلتر نتایج به سال:
BACKGROUND Community-associated Clostridium difficile infection (CDI) appears to be an increasing problem. Reported carriage rates by C. difficile are debatable with suggestions that primary asymptomatic carriage is associated with decreased risk of subsequent diarrhoea. However, knowledge of potential reservoirs and intestinal carriage rates in the community, particularly in the elderly, the m...
BACKGROUND Accurate diagnosis of Clostridium difficile infection (CDI) is paramount for patient management. The wrong diagnosis places patients at risk, delays treatment, and/ or contributes to transmission of infection in the healthcare setting. Although amplification of the toxin B gene by polymerase chain reaction (PCR) is a sensitive method for detecting toxigenic C. difficile, false negati...
BACKGROUND & OBJECTIVES Clostridium difficile is the primary cause of hospital-acquired colitis in patients receiving antibiotics. The pathogenicity of the organism is mainly due to the production of toxins. This study was conducted to investigate the presence of toxigenic C. difficile in the faecal samples of hospitalized patients suspected to have C. difficile infection (CDI) and corroboratin...
Pathogenic strains of Vibrio cholerae are responsible for endemic and pandemic outbreaks of the disease cholera. The complete toxigenic mechanisms underlying virulence in Vibrio strains are poorly understood. The hypothesis of this work was that virulent versus non-virulent strains of V. cholerae harbor distinctive genomic elements that encode virulence. The purpose of this study was to elucida...
background and objectives: cholerae disease caused by toxigenic v. cholerae, is a major public health problem in developing countries including iran. epidemiological surveillance and comparative molecular analysis of isolates have demonstrated clonal diversity among epidemic strains and a continual emergence of new clones of toxigenic v.cholerae. material and methods: a total of 20 v.cholerae s...
In toxigenic Vibrio cholerae, the cholera enterotoxin (CT) is encoded by CTXPhi, a lysogenic bacteriophage. The propagation of this filamentous phage can result in the origination of new toxigenic strains. To understand the nature of possible environmental factors associated with the propagation of CTXPhi, we examined the effects of temperature, pH, salinity, and exposure to direct sunlight on ...
BACKGROUND The reemergence of epidemic diphtheria in Belarus in 1990s has provided us with important information on the biology of the disease and the diversity of the causative agent Corynebacterium diphtheriae. Molecular investigations were conducted with the aim to analyze the genetic variability of C diphtheriae during the post-epidemic period. METHODS The biotype and toxigenicity status ...
Numerous plant species, which are main components of various mixtures used in animal nutrition, can be contaminated by mycotoxins created by large number of pathogenic and toxigenic fungi (moulds). From the aspect of animal nutrition, most important are cereals and oil crops (in form of meals) because they constitute the highest share in preparation of animal food, and on the other hand, they a...
clostridium difficile is the most common cause of nosocomial diarrhea. it is usually a consequence of antibiotic treatment, but sporadic cases can occur. this study was aimed to determine the frequency of the nosocomial clostridium difficile (c. difficile) associated diarrhea in tehran university of medical sciences hospitals and study of antibacterial susceptibility of isolates. in this study ...
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