[Low occurrence of delta agent infections in Morocco].

The incidence of delta infections in Morocco has been investigated to explain the high rate of severe hepatitis B (HB) observed in this country. The presence of delta antigen (D Ag) and antibodies to delta agent (D Ab) was tested by radio-immuno-assay in the sera from 85 HBs Ag positive patients, hospitalized in Casablanca: among them 57 suffered from acute or fulminant HB (12 deceased), 10 from chronic hepatitis and 18 from cirrhosis. Neither D Ag nor D Ab were found, excepted once in a patient with cirrhosis having shown the presence of D Ab. In contrast with the high endemicity of delta agent reported in other countries of North Africa, the incidence of delta infections seems to be very low in Morocco.