Evaluating the effects of virulence genotype, swarming motility, and multi-locus sequence types of Escherichia coli on layer chicken embryos.

Aims: To determine the effects of swarming motility (SM) and multi-locus sequence types (MLST) on the main effect of virulence genotype of Escherichia coli through an embryos lethality assay between the 12th and 18th days of incubation.

Methods And Results: We collected 58 E. coli isolates from asymptomatic commercial hens (n = 42) and lesions of colibacillosis cases (n = 16), then classified their virulence genotype as avirulent, moderately virulent, virulent-healthy, and virulent-colibacillosis categories by the presence of five virulence-associated genes (iroN, ompT, hlyF, iutA, and iss).

A compilation of virulence-associated genes that are frequently reported in avian pathogenic Escherichia coli (APEC) compared to other E. coli.

Escherichia coli survive in various hosts and environments due to their highly diversified genome. These bacteria have coevolved with humans, colonized a broad range of hosts, and survive as a commensal organism or pathogen. Escherichia coli that adopted a pathogenic lifecycle in avian hosts typically belong to phylogroups B2 and D.

Characterization of spp. in environmental water samples collected from flood prone areas of Bangladesh and their antibiotic resistance profile.

Last cholera epidemic has been recorded in Bangladesh between 1992-1993, while few sporadic localized outbreaks have been reported as recent as 2005. Serotype O1 of is considered as the principal causative agent which transmits through contaminated drinking water resulting that epidemic. Therefore, the objective of this research was to isolate in 3 different water sources; River, pond and tube-well, in 5 different locations of Gazipur, Bangladesh, and to analyze their antibiogram study.