Recent studies on Escherichia coli have demonstrated sub-lethal injury-sensitivity to oxygen and selective agents prior to irreversible inactivation when kept in water in a brass vessel. The present study was carried out to investigate whether equivalent responses occur in copper vessels using the pathogens Salmonella enterica serovar Typhi and Vibrio cholerae. Bacterial suspensions were stored...

the rate of listeria abortion in tehran was investigated. abortion samples (200) were cold enriched at 4°c and subcultured on selective culture media containing acriflavin, nalidixic acid and potassium thiocyanate. sera of patients were tested serologically (if method) for screening, and results were confirmed by culturing the positive samples. antibody against l. mollocytogelles was obtained i...

This study compares the feature of different media with the combination of selective with non-selective media in a TAL method for recovery of Listeria innocua cells exposed to thermal treatments. Experiments were conducted in broth at constant temperature (52.5 and 65.0 °C) and pH (4.5 and 7.5) conditions, using NaCl or glycerol to adjust water activity to 0.95. Four different media were used i...

Staphylococcal infection and cross-infection in hospitals is a very important problem. Investigation and management of such infection and cross-infection would be facilitated by a simple, rapid, and reliable method for the primary isolation of Staphylococcus aureus from body fluids and exudates, from feces, from carriers, from the air, and from various surfaces and fomites in the hospital envir...

The aim of the present study was to compare eight media, four nonselective and four selective media, to determine the best combination of media for the primary isolation of Helicobacter pylori. Over a period of 5 months, mucosal antral biopsy specimens were obtained from 222 consecutive dyspeptic patients undergoing endoscopy. Biopsy samples were plated in parallel on all eight media. Egg yolk ...

Five selective media for beta-haemolytic streptococci were tested and compared with the conventional blood agar plate using 200 throat swabs from children with possible streptococcal pharyngitis. The medium described by Liebermeister and Braveny, which is based on the reduction of nutrients and enhancement of the haemolytic activity of beta-streptococci, was markedly superior to the other selec...

to determine the contamination of traditional cheeses to e. coli o157:h7 this study was conducted in chaharmahal and bakhtiari province. two hundred cheeses samples were obtained randomly and bacteriological examinations were done on all isolates, by culture in selective enrichment media and after that, selective plating. suspected colonies were examined with o and h antisera for identification...

Today, people have ample opportunity to engage in selective exposure, the selection of information matching their beliefs. Whether this is occurring, however, is a matter of debate. While some worry that people increasingly are seeking out likeminded views, others propose that newer media provide an increased opportunity for exposure to diverse views. In returning to the concept of selective ex...