- Easy reading: intense mauve colony colours for better identification.
- Greater Specificity / Less workload: conventional media for the detection of Salmonella by H2S character have very poor specificity resulting in numerous false positives (Citrobacter, Proteus, etc.) among the rare, real positive Salmonella. The workload for unnecessary examination of suspect colonies is so heavy that real positive Salmonella colonies might often be overlooked in routine testing.
Because of their poor specificity, conventional media require a tedious examination of at least 10 colonies per suspected sample.
On the contrary, CHROMagar Salmonella eliminates most of those false positives and allows technicians to focus on the real contaminated samples.
- High sensitivity, leading to a higher detection rate of Salmonella:
Salmonella sensitivity: 100%*
Specificity: 89%* compared to 78% with Hektoen Agar.
*Specificity and sensitivity from scientific study: “Comparison of CHROMagar Salmonella medium and Hektoen Enteric Agar for isolation of Salmonellae from stool samples.” Gaillot O. et al. 1999. Journal of Clinical Microbiology, 37 : 762-765
- Dramatic decrease of the workload:
Number of useless confirmatory tests is minimized since there is no need of duplicating them.
Gain flexibility using powder rather than ready to use plates:
Use the entire pack, or if there is a need for a smaller number of plates, just a portion. If kept under appropriate storage temperature, CHROMagar Salmonella has a 2 years shelf life. This flexibility is essential to avoid the waste resulting from expired-unused plates.
-Referenced in the Chinese standard for microbiological examination of food hygiene GB/T 4789.4-2008
CE Marked Product Please refer to our IFU and Material Safety data sheet for complete information about the medium.
CHROMagarTM Salmonella is a trademark of Dr A. Rambach.
Last Update: 13-Apr-2012
Focus on Salmonella Species
Infections caused by Salmonella spp, including Salmonella Typhi, remain a major worldwide health problem:
- In the US, Salmonella has an incidence rate of 16.2 cases per 100,000 (CDC estimation, 2008).
- In Europe, it is reported as the first cause of collective toxi-infections. (2007 EFSA report)
- In developing countries, Salmonella Typhi and Paratyphi are commonly encountered with an estimated annual incidence of about 17 million cases. (2007 EFSA report)
Moreover, according to a recent WHO report, Salmonella infections are responsible for 2 million deaths per year from diarrhoea.
Salmonella Epidemiologic Issues
Mainly due to contamination in the food chain and/or during food-production processes, Salmonella commonly induces enteric illness whose major symptoms are abdominal cramps, diarrhea, nausea, vomiting.
More severe cases, for instance typhoid cases or infections in immuno-depressed patients, can lead to body dehydration with renal failure or bacteraemia.