The Role of Certain Species of Small Mammals in the Persistence of Natural Focality in the Territory of Forest-Steppe Zone of the Natural Tularemia Focus of the Stavropol Region
https://doi.org/10.21055/0370-1069-2014-3-30-33
Abstract
Epizootiological monitoring of the forest-steppe area of the natural tularemia focus in the Stavropol region has revealed that the role of particular species of small mammals in the persistence of natural tularemia focality is unequal. Epizootic activity of the focus in 1959-1970 was determined by the numerous species of rodents: Microtus arvalis , mice of Syvaemus genus and Mus musculus . In 1972-2010 there occurred significant changes in the grouping of the main tularemia agent carriers under the influence of strong anthropogenic pressure. Nowadays the leading role is played by the widely-spread and subsistent mice of Sylvaemus genus and C. suaveolens , the latter ones being responsible for 31.2 % of overall, isolated from small mammals, tularemia agent strains. In addition to this, epizootic significance of M. arvalis has greatly changed. Index of strains isolated from field vole has lowered from 55.3 up to 28.4. Numbers of M. arvalis and Mus musculus are continuously on the low level, which is due to the absence of favorable breeding conditions. It reduces their impact on the persistence of natural focality in the territory under surveillance significantly.
About the Authors
B. I. Levchenko
Stavropol Research Anti-Plague Institute
Russian Federation
Russian Federation
L. V. Degtyareva
Stavropol Research Anti-Plague Institute
Russian Federation
Russian Federation
A. A. Zaitsev
Stavropol Research Anti-Plague Institute
Russian Federation
Russian Federation
M. P. Grigor’Ev
Stavropol Research Anti-Plague Institute
Russian Federation
Russian Federation
V. V. Ostapovich
Stavropol Research Anti-Plague Institute
Russian Federation
Russian Federation
References
1. Dunaeva T.N. [Experimental investigations of tularemia in the wild animals such as rodents, predators, and insects as a basis of its natural foci studies]. Zool. Zh. 1954; 2(33):296–318.
2. Levchenko B.I., Degtyareva L.V., Tikhenko N.I., Solodovnikov B.V., Bryukhanov A.F. [Solar cycles and abundance rate dynamics in small mammals habitant in the territory of natural tularemia focus]. In: [Cycles. Proceedings of the VII International Conference]. Stavropol; 2005. P. 189–92.
3. Levchenko B.I., Tikhenko N.I., Degtyareva L.V., Tsygankova R.E., Bryukhanov A.F. [Epizootic significance of various biotopes in micro-focus “Sengilevsky”]. In: [Collection of Scholarly Works Devoted to the 50th Anniversary of Dagestan Plague Control Station Establishment]. Makhachkala; 2002. P. 81–5.
4. Popov P.N., Rtishcheva L.V., Degtyareva L.V., Levchenko B.I., Tikhenko N.I., Ostapovich V.V. [Epizootic activity of natural tularemia focus in the Stavropol region]. Med. Vestnik Severn. Kavkaza. 2011; 4(24):44–7.
5. Tikhenko N.I., Levchenko B.I., Bryukhanov A.F., Degtyareva L.V., Tsygankova R.E., Antonenko A.D. [Epizootic significance of the musk whitetoothed shrews in the natural steppe-type tularemia focus of the Stavropol region]. Med. Parazitol. Parazitarn. Bol. 2001; 2:46–8.
Review
For citations:
Levchenko B.I., Degtyareva L.V., Zaitsev A.A., Grigor’Ev M.P., Ostapovich V.V. The Role of Certain Species of Small Mammals in the Persistence of Natural Focality in the Territory of Forest-Steppe Zone of the Natural Tularemia Focus of the Stavropol Region. Problems of Particularly Dangerous Infections. 2014;(3):30-33. (In Russ.) https://doi.org/10.21055/0370-1069-2014-3-30-33
Views:
788
Email this article 