[Hepatitis C viral infection at the beginning of twenty-first century].
The article reviews basic information on the epidemiology, origin, diagnostics and therapy of hepatitis C viral infection. Virus of the hepatitis C was identified in 1989. The most frequent transmission pathway till 1992 was the reception of blood derivatives, after that year, when transfusion centres started to use detection sets to prove anti-HCV antibodies, the incidence of post-transfusion hepatitis C dropped almost to zero. The most common route of transmission at present is the intravenous toxicomany, and significant participation represents the medical care. The basic serological marker of HCV infection is the presence of anti-HCV antibodies. Those antibodies signify markers of the human contact with the virus; they need not automatically mean the encounter of infection. More often it is contrariwise--because the C viral hepatitis develops the chronic stadium up in 85%, the anti-HVC positivity signifies usually the active form of infection. To prove the active form of infection it is necessary to identify viral nucleic acids in the serum of the examined patient. The standard therapy of the chronic form of the C viral hepatitis is at present a combination of pegylated interpherons alpha and ribavirin. Such form of therapy can result the permanent elimination of the virus in about 60% of cases. In the C viral hepatitis neither the specific pre-exposition nor post-exposition prophylaxis is available. The only prevention of the transmission of infection is the avoidance of any risk factor of transmission, namely in the medical care.