نتایج جستجو برای: toxigenic

تعداد نتایج: 3725  

Farzaneh Amin-Harati , Mohamad Hossein Salari, Mohamadreza Ghasemi, Nourkhoda Sadeghifard, Sedigheh Ghorchian,

Background and Aims: Clostridium difficile is an identified cause of antibiotic-associated diarrhea, antibiotic-associated colitis, pseudomembranous colitis and nosocomial diarrhea. The objective of this survey was to determine molecular analysis of toxigenic Clostridium difficile isolates from hospital environment in Tehran tertiary medical centers. Materials and Methods: In this descriptiv...

2001
Valéria N. Silva Edison Luiz Durigon Maria de Fátima Costa Pires Alexandre Lourenço Maria Jacinta de Faria Benedito Corrêa

Two strains of Aspergillus flavus, non-toxigenic NRRL 6550 and toxigenic NRRL 5940, were studied over a period of 44 days, in order to detect the presence of virus-like particles (VLPs) by means of electron microscopy (EM) and nucleic acids electrophoresis. Only the toxigenic strain contained VLPs, presenting three-segmented dsRNA. An increase in VLPs number was observed during the exponential ...

Journal: :archives of razi institute 2016
y. tahamtan m. hayati m.m. namavari

during one year period from 2010 to 2011 the samples from pneumonic animals were taken and transported to the laboratory. pasteurella multocida were identified in 16.6% of animal by biochemical test. the high incidence of p. multocida was obtained in the south of fars province, where the area was warm region. the mean death time between the isolates was 12-18 and 19-24 hours. only the capsular ...

Journal: :The Journal of Experimental Medicine 1957
Jonathan W. Uhr Matthew Scharff

Guinea pigs infected by intradermal injection of living toxigenic diphtheria bacilli and protected by horse antitoxic globulin, given either before or after infection, develop delayed hypersensitivity of the tuberculin type to diphtherial proteins. The highest degree of hypersensitivity is specifically directed against diphtheria toxin (or toxoid) itself, although smaller delayed skin reactions...

2013
Michael S.M. Brouwer Adam P. Roberts Haitham Hussain Rachel J. Williams Elaine Allan Peter Mullany

Clostridium difficile is a major nosocomial pathogen and the main causative agent of antibiotic-associated diarrhoea. The organism produces two potent toxins, A and B, which are its major virulence factors. These are chromosomally encoded on a region termed the pathogenicity locus (PaLoc), which also contains regulatory genes, and is absent in non-toxigenic strains. Here we show that the PaLoc ...

Journal: :Journal of bacteriology 2007
Bo Pang Meiying Yan Zhigang Cui Xiaofen Ye Baowei Diao Yonghong Ren Shouyi Gao Liang Zhang Biao Kan

Toxigenic serogroups O1 and O139 of Vibrio cholerae may cause cholera epidemics or pandemics. Nontoxigenic strains within these serogroups also exist in the environment, and also some may cause sporadic cases of disease. Herein, we investigate the genomic diversity among toxigenic and nontoxigenic O1 and O139 strains by comparative genomic microarray hybridization with the genome of El Tor stra...

Journal: :The Biochemical journal 1988
M Saxena K G Mukerji H G Raj

The presence of glutathione (GSH) S-transferase activity, using 1-chloro-2, 4-dinitrobenzene (CDNB) as a substrate, has been established in the cytosolic fraction of the toxigenic (aflatoxin producing) and nontoxigenic strains of Aspergillus flavus. Significant differences in the GSH S-transferase activity were observed between the toxigenic and non-toxigenic strains. A positive correlation has...

Journal: :Clinical Microbiology Reviews 1990

2013
Eden Ephraim Ronald D. Schultz Nasia Safdar

Aims: To determine the anti-cytotoxic effects of Lactobacillus rhamnosus GG (LGG) against extracellular and intracellular Clostridium difficile toxins. Study Design: Co-culture system. Place and Duration of Study: Division of Infectious Diseases, Department of Medicine, School of Medicine and Public Health and Department of Pathobiological Sciences, School of Veterinary Medicine, Madison, Wisco...

2013
Ju-Hsin Chia Hsin-Chih Lai Lin-Hui Su An-Jing Kuo Tsu-Lan Wu

INTRODUCTION We investigated the changing trend of various toxigenic Clostridium difficile isolates at a 3 500-bed hospital in Taiwan. Genetic relatedness and antimicrobial susceptibility of toxigenic C. difficile isolates were also examined. METHODS A total of 110 non-repeat toxigenic C. difficile isolates from different patients were collected between 2002 and 2007. Characterization of the ...

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