Farm size, seining practices, and salt use: risk factors for Aeromonas hydrophila outbreaks in farm-raised catfish, Alabama, USA.

In freshwater aquaculture systems, Aeromonas hydrophila is usually considered to be an opportunistic pathogen most often associated with secondary bacterial infections. Since 2009, the U.S.

Looking beyond bullying to assess the impact of negative behaviours on healthcare staff.

Background: Evidence suggests that bullying behaviours are common in the NHS. Various health organisations in the area studied had experienced problems with negative behaviours between staff and it was decided that research was needed.

Aim: To assess and analyse negative behaviours experienced and/or witnessed by primary healthcare staff.

Antibiotic resistance analysis of fecal coliforms to determine fecal pollution sources in a mixed-use watershed.

Antibiotic resistance analysis was performed on fecal coliform (FC) bacteria from a mixed-use watershed to determine the source, human or nonhuman, of fecal coliform contamination. The study consisted of discriminant analysis of antibiotic resistance patterns generated by exposure to four concentrations of six antibiotics (ampicillin, gentamicin sulfate, kanamycin, spectinomycin dihydrochloride, streptomycin sulfate, and tetracycline hydrochloride). A reference database was constructed from 1125 fecal coliform isolates from the following sources: humans, domestic animals (cats and dogs), agricultural animals (chickens, cattle, and horses), and wild animals.

Design and Application of Two Rapid Screening Techniques for Isolation of Mn(IV) Reduction-Deficient Mutants of Shewanella putrefaciens.

Chemical mutagenesis procedures and two newly developed rapid plate assays were used to identify two Mn(IV) reduction-deficient (Mnr) mutants of Shewanella putrefaciens. All eleven members of a set of previously isolated Fe(III) reduction-deficient (Fer) mutants displayed Mnr-positive phenotypes on the plate assays and were also capable of anaerobic growth on Mn(IV) as the sole terminal electron acceptor.