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Sixty-one patients with AHC were identified (sex ratio: M\/F 1\u00b77\/1; mean age 39 years). Forty-four (72%) had documented seroconversion within a 6-month period. Main reported risk exposures were intravenous or nasal drug use (35%), invasive medical procedures (25%) and sexual contact with a HCV-positive partner (20%). Spontaneous clearance of HCV RNA was observed in seven out of 16 patients followed without therapy. This study confirms the major role of drug use in HCV transmission and highlights the role of invasive medical procedures and occupational exposure.<\/jats:p>","DOI":"10.1017\/s0950268807009417","type":"journal-article","created":{"date-parts":[[2007,8,16]],"date-time":"2007-08-16T08:00:23Z","timestamp":1187251223000},"page":"988-996","source":"Crossref","is-referenced-by-count":8,"title":["Epidemiological characteristics and medical follow-up of 61 patients with acute hepatitis C identified through the hepatitis C surveillance system in 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