Salmonella bacterium

Da. The spectrum of the MP-SS1 amplified mixture shows these same peaks indicating the presence of the Salmonella bacterium. In other experiments MP-SS1 provided no amplification of the Shigella spp., thus demonstrating the specificity of the MP-SS1 toward a Salmonella host cell. 

People who have salmonellosis should not prepare food or pour water for others until diey have been shown to no longer be cariy ing the Salmonella bacterium. 

There are also examples of non-competitive assays in the literature for analyzing different clinically important species. For example, an immunosensor for the pathogenic bacterium Salmonella typhi and for bacterial toxins from pathogenic Vibrio chol-erae [21-23],... 

Professor Bruce Ames, a biochemist at the University of California at Berkeley is one of the pioneers of this type of short-term testing. The Ames Test, as it is called, is now widely used, typically as one of several short-term tests that constitute a series of tests, or battery. A battery is thought necessary because no single test is adequate to detect all types of genotoxicity. The Ames Test involves the use of mutant strains of a common bacterium. Salmonella typhimurium, that back-mutate to their normal state in the presence of a mutagenic chemical or metabolite. Many other bacterial and mammalian cell systems have been made available for this type of testing. 

A main finding was the detection in retail poultry of . jejuni cultured in 192 of 862 specimens examined, as compared with 30 for Salmonella. Other types of retail meat had negligible contamination by either bacterium. Similarly, 48% of the jejuni enteritis cases were estimated to originate in poultry and none in beef or pork. Only a few of the cases were hospitalized. There were no deaths. 

Campylobacter is notoriously fastidious and has very specific growth conditions. The bacterium can survive for short periods outside the host environment but not to the same extent as Salmonella and E. coli (Alter and Scherer, 2006 Garenaux et al., 2008 Mihaljevic et al., 2007). However, despite such fragility, C. jejuni, and to a lesser extent Campylobacter coli, has been the main cause of gastroenteritis for several years 0anssen et al., 2008). This is likely due to the low infectious dose (<500 cells) required to cause symptoms in susceptible hosts and the high carriage rate in livestock (Ozcakir, 2007). 

It has been observed that pathogens such as Salmonella and E. coli 0157 H7 preferentially attach to cut surfaces and natural openings such as stomata, whereas common epiphytes such as Ps. fluoresecens colonize the intact plant tissue (Li et al., 2008 Melotto et al., 2006 Seo and Frank, 1999 Takeuchi and Frank, 2001). It is known that attachment of human pathogens is an active process which requires the bacterium to be in a viable state although the actual internalization process can be passive (Solomon and Matthews, 2006). 

Typhoid fever is a disease which starts as an infection of the gastrointestinal tract. It is caused by the bacterium Salmonella typhi. It spreads by ingestion of contaminated food or drink. Normally Salmonella typhi bacterium is inactivated by... 

Determination of the genotoxicity of water and wastewater with the genetically engineered bacterium Salmonella typhimurium TA 1535/pSK 1002. 

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