[The epizootic situation on the territories with natural foci of plague in Chechen Republic and in the Republic of Ingushetia]. / Epizootologicheskaia obstanovka na ochagovykh po chume territoriiakh Chechenskoi Respubliki i Respubliki Ingushetiia.

Information on recent epizootic activity on the territories with natural foci of plague, situated in the Chechen Republic and the Republic of Ingushetia, is presented. Opinion is advanced concerning an increase in the epidemiological potential of the Terek-Sunzha hill focus and the Caspian sand focus of plague, which under the conditions of complicated socio-political situation in the area does not exclude the possibility of epidemiological complications.

[State of the natural foci of tularemia in the eastern part of the Northern Caucasian region]. / Sostoianie prirodnykh ochagov tuliaremii v vostochnoi chasti regiona Severnogo Kavkaza.

The short characterization of the territory, known to contain the natural foci of tularemia, in the eastern part of the foothill area of the Caucasus is presented. The Caspian plain-foothill focus and the Terek-Kuma focus were shown to be the most dangerous among these foci. The severe outbreak of tularemia took place in the Terek-Kuma focus in 1999. Local epizootic could be stopped here only after the appearance of patients with clinical manifestations of tularemia. The epizootological survey of the territory for tularemia in 3 natural foci of Daghestan and in the natural focus of the Caucasian foothill area is carried out in an insufficient volume due to the complicated socio-political situation in the Chechen Republic and the insufficient financial support of the work on the study of the foci.

[Outbreak of tularemia in the Republic of Dagestan]. / Vspyshka tuliaremii v Respublike Dagestan.

In Daghestan in the focus of the flood-plain swamp type 64 persons fell ill with tularemia in 1999. During the epizootological survey 8 Francisella tularensis strains were isolated from vectors and carriers and in 7 samples taken from open water reservoirs, as well as in 1 sample obtained from Ixodes ticks, tularemia antigen was detected. Humans were infected mainly by the transmissive route, as found in 71.8% of patients. 28% of patients were infected through contacts. The disease took mainly a mild course, registered in 95.6% of patients. The disease affected those persons who had not been immunized against tularemia.

[Population density and area-specific distribution of the imago form of Hyalomma marginatum ticks, the vector of Crimean haemorrhagic fever, in Dagestan]. / Chislennost' i statsial'noe raspredelenie imago iksodovogo kleshcha Hyalomma marginatum--perenoschika krymskoi gemorragicheskoi likhoradki v Dagestane.

The results of the determination of the amount and location of ticks Hyalomma marginatum in Daghestan at the period of the appearance of cases of Crimean haemorrhagic fever (CHF) are presented. The domination and abundance indices of these ticks in different landscape areas, on the territories of some plain and foothill regions of the Republic of Daghestan are given. The advantages of the effective method for the collection of ticks "on the observer" have been substantiated. The data thus obtained are of importance for the epidemiological surveillance and prophylaxis of CHF.