A study was conducted on the circulation of potentially diarrheagenic Escherichia coli in two groups of children, both under the age of seven. The first group (548 children) suffered from mild diarrhea and attended the Xipamanine Health Center of Maputo, in Mozambique. The second group (380 children) included randomly chosen, asymptomatic, children from the same population. A total of 503 E. co...

Enteroinvasive Escherichia coli (EIEC) causes dysentery; however, it is less widely reported than other etiological agents in studies of diarrhea worldwide. Between August 2003 and July 2005, stool samples were collected in case-control studies in 22 rural communities in northwestern Ecuador. Infection was assessed by PCR specific for LT and STa genes of enterotoxigenic E. coli (ETEC), the bfp ...

The locus of enterocyte effacement (LEE) pathogenicity island of enterohemorrhagic Escherichia coli (EHEC) O157:H7 possesses the same genes in identical order and orientation as the LEE of enteropathogenic E. coli (EPEC) O127:H6 but is unable to form attaching and effacing (A/E) lesions or to secrete Esp proteins when it is cloned in an E. coli K-12 background. The A/E phenotype could not be re...

background and objectives: enterohemorrhagic escherichia coli (ehec) o157:h7 has been recognized as a major food borne pathogen responsible for frequent hemorrhagic colitis and hemolytic uremic syndrome in humans. cattle are important reservoirs of e. coli o157:h7, in which the organism colonizes the intestinal tract and is shed in the feces. objective: vaccination of cattle has significant pot...

background and objectives: diarrheagenic escherichia coli (dec) strains are a major cause of intestinal syndromes in the developing countries. the aim of this study was to determine the prevalence of enterotoxigenic e. coli (etec) and enteroinvasive e. coli (eiec) in relation to phylogenetic background from patients with diarrhea. materials and methods: a total of 110 e. coli isolates were obta...

the emergence of multidrug resistant strains of escherichia coli has complicated treatment decision and may lead to treatment failures. from april to november 2001 we prospectively evaluated the prevalence of resistance to trimethoprim-sulfamethoxazole (sxt), gentamicin, cephalothin, ciprofloxacin, and nitrofurantoin in 220 escherichia coli isolates from patients with urinary tract infections i...

conclusions the obtained results indicate that rsm is an effective method for the optimization of culture conditions for hes gene expression in e. coli. results a maximum rhes mrna level of 376.16% was obtained under the following conditions: 0.6 mm iptg, 7 hours post-induction time, and 0.9 cell density before induction. the level of rhes mrna was significantly correlated with post-induction t...

results the bacteriophage, designated mj1, was isolated by testing against a clinical mdr e. coli 3 strain. the mj1 phage showed a wide range of heat and ph stability. the phage morphology, determined by transmission electron microscopy, revealed a structure comprised of a head (108 ± 0.2 nm long by 128 ± 0.5 nm wide) and a contractile tail (123 ± 0.5 nm long by 15 - 26 nm wide). these features...

materials and methods: in order to achieve this, recombinant plasmid harboring antisense sequences targeting both of pta and acka was assembled, after transfecting to the cells, its effects on the cell growth and acetate accumulation in the minimal media was assessed and compared with the control, the plasmid without antisense cassette, in presence and absence of iptg in escherichia coli bl21 (...

introduction: the a im of this study is the evaluation of the effect of antimicrobial photodynamic therapy with radachlorin on staphylococcus aureus and escherichia coli. new windows are open in the antimicrobial field so-call photodynamic therapy that incorporates a nonpoisonous photosensitizer (ps) with innocuous special wavelength photons to excite the ps. methods: two strains of bacteria us...