RT Journal Article SR Electronic T1 Search for retrovirus in the chronic fatigue syndrome. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 1058 OP 1061 DO 10.1136/jcp.45.12.1058 VO 45 IS 12 A1 J W Gow A1 K Simpson A1 A Schliephake A1 W M Behan A1 L J Morrison A1 H Cavanagh A1 A Rethwilm A1 P O Behan YR 1992 UL http://jcp.bmj.com/content/45/12/1058.abstract AB AIM: To examine peripheral blood and skeletal muscle from patients with chronic fatigue syndrome for exogenous retrovirus. METHODS: Blood samples from 30 patients and muscle biopsy specimens of 15 patients were examined for retroviral sequences by DNA extraction, polymerase chain reaction (PCR), and Southern blotting hybridisation. Sera were examined for human foamy virus by western immunoblotting and indirect immunofluorescence techniques. RESULTS: No differences between the patient and control populations was found for any of the PCR primer sets used (gag, pol, env, and tax regions of HTLV I/II). An endogenous gag band was observed in both the patient and control groups. All sera were negative for antibody to human foamy virus. CONCLUSION: The results indicate that there is no evidence of retroviral involvement in the chronic fatigue syndrome.