Group A streptococcal infections do not appear to trigger Tourette syndrome (TS) or obsessive-compulsive disorder (OCD), according to a case-control study by researchers in England, a finding at odds with some smaller studies conducted in the United States (Schrag A et al. Neurology. doi:10.1212/WNL.0b013e3181bd10fd [published online ahead of print September 30, 2009]).
Stephenson J. Strep and OCD, Tourette. JAMA. 2009;302(15):1640. doi:10.1001/jama.2009.1526
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