Stroop performance in drug users classified by HIV and hepatitis C virus serostatus

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Abstract
Hepatitis C virus (HCV) can be detected in the brain (Radkowski et al., 2002) and investigators speculate that HCV has neuroinvasive properties (Forton et al., 2003) with direct effects on cerebral function. MRS studies show that the basal ganglia and white matter of individuals with HCV have abnormal choline/creatine ratios, indicating CNS inflammation or infection (Forton et al., 2003). Patients with HCV show defects in working memory and information processing speed (Forton et al., 2003; Hilsabeck et al., 2002), similar to patients with basal ganglia disorders and HIV (e.g., Heaton et al., 1995).