Shigella and Salmonella strains isolated from clinical samples were examined. Out of 42 Shigella strains tested, 17 (40%) were found to be colicinogenic and another 3 were lysogenic. All three lysogens yielded a phage antigenically homologous to coliphage P2. Out of 30 strains tested, only 1 was found to be resistant to both neomycin and sulfamethoxazole. Out of 48 strains of Salmonella tested ...

The genus Salmonella includes many pathogens of great medical and veterinary importance. Bacteria belonging to this genus are very closely related to those belonging to the genus Escherichia. lacZYA operon and lacI are present in Escherichia coli, but not in Salmonella enterica. It has been proposed that Salmonella has lost lacZYA operon and lacI during evolution. In this study, we have investi...

It was investigated how organic rearing conditions influence the Salmonella enterica infection dynamics in pigs and whether Salmonella persists in the paddock environment. Pigs inoculated with S. enterica serovar Typhimurium were grouped with Salmonella-negative tracer pigs. Bacteriological and serological testing indicated that organic pigs were susceptible to Salmonella infections, as 26 of 4...

Background: Salmonella spp. is one of the most common pathogens associated with fresh produce related foodborne illness. This study aimed to determine Salmonella spp. contamination level in betel leaf, internalization potential and possible decontamination process. Results: A total of 77% betel leaf sample collected from local market was found to be contaminated with Salmonella spp. Of all the ...

OBJECTIVES To detect the qnrA, qnrB and qnrS genes among Salmonella isolates received at the French National Reference Centre for Salmonella in Paris, France. METHODS Antibiotic susceptibility was determined by disc diffusion for 499 Salmonella isolates including 320 Salmonella Typhimurium, 100 Salmonella Enteritidis and 79 Salmonella Hadar collected in 2002. Amplification with specific prime...

objective(s):typhoid fever is a dreadful disease of a major threat to public health in developing countries. vaccination with bacterial immunodominant components such as surface proteins may prove as a potent alternative to live attenuated vaccines. invh, an important part of needle complex in type three secretion system (ttss) plays important role in efficient bacterial adherence and entry int...

background and objectives: the significant rise in food borne infections is mainly caused by campylobacter spp., salmonella serovars and verotoxigenic escherichia coli . as the emerging food borne pathogens cause disease, more studies have been conducted for rapid detection of these pathogens. the combination of immunomagnetic separation and polymerase chain reaction (ims-pcr) is the most accur...

the objective of the current study was to evaluate the reproducibility of a reverse transcriptase pcr (rt-pcr)-based technique to differentiate viable and dead salmonella cells in raw and sterilized milk. the microorganism was initially inoculated into the milk samples followed by incubating at 37°c for 4 h prior to inactivation by heat at 80°c for 10 min. the treated and non-treated samples we...

salmonella spp. are important food borne pathogens worldwide that frequently infect poultry flocks. this cross-sectional study was conducted to determine the prevalence of salmonella spp. colonization in broiler flocks in shiraz (southern iran) and to find the possible association of infection status with some potential risk factors including vaccination program and use of antibiotics. during o...