Published in Vaccine Weekly, January 7th, 2004
According to recent research published in the Journal of Infectious Diseases, "Using sequence analysis to detect variation within the hypervariable M protein N terminus, we found 41 emm types encompassing 81 subtypes, among 1,064 consecutive invasive group A Streptococcus isolates from a recent multistate, population-based surveillance. Seventeen of the 30 emm types represented by multiple isolates displayed multiple subtypes."
"Most subtypes differed from reference strain emm...
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