Rickettsioses studies. 3. Natural foci of rickettsioses in south Bohemia.

Antibodies against Coxiella burnetii and against rickettsiae of the spotted fever group were found in human sera and in sera from domestic and wild animals collected in south Bohemia. Spotted fever group rickettsiae were also discovered in the tick Ixodes ricinus. These results indicate the presence of both types of rickettsiae in this part of Czechoslovakia.

Ricettsioses studies. 2. Natural foci of rickettsioses in east Slovakia.

Natural foci of Q fever and of spotted fever group rickettsiae in the Kosice district of east Slovakia are described and discussed. It was established that the natural focus of Q fever was a secondary one. Cattle were observed to be the main source of human infection and a high proportion of synanthropic rodents was found to be infested with Coxiella burnetii.

Rickettsioses studies. 1. Natural foci of rickettsioses in the Armenian Soviet Socialist Republic.

Ixodid ticks collected in the Armenian SSR during 1971 and 1974 were positive for rickettsiae of the spotted fever group, as confirmed by haemocyte tests and by isolation experiments. Serum specimens collected from human beings and from domestic and wild animals in the same areas contained antibodies against such rickettsiae and against Coxiella burnetii. These results indicate the existence of mixed natural foci of rickettsioses of the spotted fever group and of Q fever in the Armenian SSR.