| prevalence of agr specificity groups among methicilin resistant staphylococcus aureus circulating at charles nicolle hospital of tunis. | methicillin resistant staphylococcus aureus (mrsa) is a major human pathogen with many clinical aspects. in s. aureus, the accessory gene regulator (agr) globally controls the production of virulence factors. there are four agr groups. our study was done to define the agr specificity of mrsa circulating at charles nicolle hospital and to investigate a possible relationship between agr groups and human disease types. from january 2004 to june 2005, a total of 57 mrsa isolated from individual hosp ... | 2006 | 17027197 |