The environmental influence of farm management in concentrated animal feeding operations (CAFO) can yield vast changes to themicrobial biota and ecological structure of both the pig andwastemanure lagoonwastewater.While someof these changesmaynot benegative, it is possible that CAFOs can enrich antibiotic resistant bacteria or pathogens based on farm type, thereby influencing the impact imparte...

Clostridium difficile PCR ribotype (RT) 014 is well-established in both human and porcine populations in Australia, raising the possibility that C. difficile infection (CDI) may have a zoonotic or foodborne etiology. Here, whole genome sequencing and high-resolution core genome phylogenetics were performed on a contemporaneous collection of 40 Australian RT014 isolates of human and porcine orig...

Antibiotic treatment can impact nontarget microbes, enriching the pool of resistance genes available to pathogens and altering community profiles of microbes beneficial to hosts. The gut microbiota of adult honeybees, a distinctive community dominated by eight bacterial species, provides an opportunity to examine evolutionary responses to long-term treatment with a single antibiotic. For decade...

Avian ESBL-producing Escherichia coli isolates have been increasingly reported worldwide. Animal to human dissemination, via food chain or direct contact, of these resistant bacteria has been reported. In Tunisia, little is known about avian ESBL- producing E. coli and further studies are needed. Seventeen ESBL-producing Escherichia coli isolates from poultry feces from two farms (Farm 1 and fa...

The nucleotide sequence of the tetracycline resistance gene tetM encoded by streptococcal conjugative shuttle transposon Tnl545 has been determined. The resistance gene was identified as a coding sequence of 1917 base pairs corresponding to a protein with a Mj. of 72,500 daltons. This value is in good agreement with that, 68,000 daltons, estimated by SDS-polyacrylamide gel electrophoresls of Es...

BACKGROUND As a primary source of Shiga-toxin-producing Escherichia coli (STEC) infection, cattle are often targeted to develop strategies for reducing STEC contamination. Monitoring the virulence potentials of STEC isolates from cattle is important for tracing contamination sources, managing outbreaks or sporadic cases, and reducing the risks for human infection. This study aimed to investigat...