The purpose of the study was to suppress a known natural focus of field fever exerting an influence on animal hosts of leptospires – small terrestrial mammals (s.t.m.) by rodenticide. After repeated application of the zinc phosphide rodenticide, the s.t.m. were regularly live-trapped and checked for leptospirosis by dark-field microscopy and culture of their renal tissue and serological examination. Isolated leptospira strains were typed by help of rabbit factor sera. The deratization influenced the s.t.m. structure considerably: the proportion of the dominant Microtus arvalis subjects – the main reservoirs of Leptospira kirschneri serovar Grippotyphosa – were gradually and substantionally reduced and, contrarily, the percentage of the potetial hosts subjects – Clethrionomys glareolus and Apodemusfl avicollis – rose decisively over time. Changes in culture and serological positivity for leptospirosis of s.t.m. have also been enregistered. The highest original infestation of M. arvalis have slowly but strongly decreased while that of C. glareolus and A. fl avicollis has increased decisively and reached its maximum within the last years of investigation. It is probable that these two animal species have undertaken the leading role in the maintenance of the natural focus of the field fever. In other animal species analogous trends were not registered. Based on these long-term fi ndings, there exists the possibility to suppress only partially and temporarily the epizootic process of leptospirosis in a natural focus that can be desirable in some circumstances (building or free time activities, etc.).
REFERENCES(14)
1.
Ananyin VV (Ed.): Leptospiroses in Men and Animals. Medicina, Moscow 1971 (in Russian).
Dikken H, Kmety E: Serological typing methods of leptospiroses. In: Bergan T, Norris JR (Eds): Methods in Microbiology, 259-307. Academic Press, London, New York, San Francisco 1978.
udecová H: Epizootologic Study of Domestic animals’ Leptospiroses Pertaining to the Region of the State Veterinary Institute of Bratislava. Dissertation. Institute of the Teaching and Education of Veterinarians, Košice 1997 (in Slovak).
Jareková J, Kmety E: Investigation of the evolution in natural foci of leptospiroses in selected localities of the lawlands Záhorie. Entomol. Problems (Bratislava) 1989, 19, 347-355 (in Slovak).
Kmety E, Bakoss P: To the question of the selection of antigens for micro-agglutination test in leptospiroses. Czechoslov Epidemiol 1978, 27, 247-252 (in Slovak).
Lysý J, Řeháček J, Kocianová E, Kožuch O, Nosek J, Grulich I: Results of zoological and parasitological survey in some localities of the lawlands Záhorie in years 1977-1985. Entomol Problems (Bratislava) 1989, 19, 297-317 (in Slovak).
Mikulecký M Sen., Bakoss P, Kmety E: Leptospiral infections in Slovakia 1949-1995: Trends and periodicities. In: Mikulecký M Sen. (Ed.): Proceedings of the 3rd Internat. Workshop Chronobiology and its roots, High Tatras, Slovakia 2-6 September 1997. Slovak Med. Soc., Bratislava 1997.
Zaytsew SV, Chernukha JG: Possibility of survival of pathogenic leptospirae in the soil of a natural focus. In: Litvin VJ, Chernukha JG, Nikitina NA, Tartakovskij IS, Volk AV, Kotovich MN (Ed.): Ecology of Agents of Sapronoses, 85-94. Gamaleya Institute, Moscow 1988 (in Russian.
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