Thirty-nine Bacillus strains obtained from a variety of environmental and food sources were screened by PCR for the presence of five gene targets (hblC, hblD, hblA, nheA, and nheB) in two enterotoxin operons (HBL and NHE) traditionally harbored by Bacillus cereus. Seven isolates exhibited a positive signal for at least three of the five possible targets, including Bacillus amyloliquefaciens, B....

Smokeless tobacco (ST) products vary significantly in their oral carcinogenicity. Much is known about the differences in the chemical, but not the bacterial, constituents of these products. In this study, we explored the composition and function of the bacteriome in ST products from four countries using quantitative polymerase chain reaction (qPCR) and 16S rRNA-based next generation sequencing....

Shewanella is Gram-negative motile bacillus, non fermentative and facultative anaerobe. Its natural habitat is all forms of water and soil, but has also been isolated from fish, dairy products, oils, and carcasses. Often found with microflora of the marine environment. Bacterial infections with Shewanella spp. are rare. The exposure to the marine environment, sea and diary food are considered a...

A technique was developed to study microcolony formation by silicone-immobilized bacteria on polycarbonate membrane filters under anaerobic conditions. A sudden shift to anaerobiosis was obtained by submerging the filters in medium which was depleted for oxygen by a pure culture of bacteria. The technique was used to demonstrate that preinduction of nitrate reductase under low-oxygen conditions...

The prevalence of beta-lactamase-producing bacteria in subgingival plaque from patients with refractory periodontitis in Norway was assessed by the chromogenic nitrocefin method. beta-Lactamase activity was detected in 68% of the patients. Enzyme-producing strains belonged predominantly to the genus Prevotella; others were staphylococci, enteric gram-negative rods, and Bacillus spp.

The study aimed to compare the bacteriological quality of an urban and rural irrigation water source. Bacterial counts, characterization, identification and diversity of aerobic bacteria were determined. Escherichia coli isolated from both sites was subjected to antibiotic susceptibility testing, virulence gene (Stx1/Stx2 and eae) determination and (GTG)5 Rep-PCR fingerprinting. Low mean monthl...

Cockroaches have been regarded as possible vectors of human enteropathogens. Their presence and crawl particularly in food handling establishments could be risky for human health. Therefore, this study was done to determine the vector potential of cockroach for medically important bacterial pathogens in restaurants and cafeterias. A cross-sectional study was conducted on cockroaches from restau...

Fındığın ana zararlıları yanında, genel bir zararlı olan Mayıs böceği (Melolontha spp.) fındık bahçelerinde önemli verim kayıplarına ve bitkilerin kurumasına neden olmaktadır. Karadeniz Bölgesi böceklerle mücadelede yere sahip entomopatojen mikroorganizmalar açısından oldukça zengin alandır. Ülkemizde üretim alanlarından izole edilen fungus bakteriler laboratuvar koşullarında M. melolontha’ya k...

Uno de los principales residuos que se genera en la industria láctea es el lactosuero, por su alta carga orgánica representa un serio problema ambiental cuando desechado a cuerpos naturales receptores, alterando calidad ambiental. Se evaluó eficiencia sistema combinado compuesto laelectrocoagulación y filtro biológico; para lo cual realizó proceso electrocoagulación reactor régimen batch con el...

The antibacterial activity of the root, stem and leaf extracts of Excoecaria agallocha L. was tested against the test organisms Bacillus subtilis, Escherichia coli, Klebsiella pneumoniae, Salmonella spp., Shigella sonnei and Staphylococcus aureus. The activity was tested both by agar well diffusion and disc diffusion methods. It was found that the extracts were very effective in controlling the...