Prevalence of the pathatus Cryptosporidium parvum in syananthropic biocenoses

The purpose of the research is to determine the relationship between the infestation of Cryptosporidium parvum in calves that have regular contact with synanthropic reservoirs (rodents and birds) in the climatic zones of Udmurtia. The study of the distribution and relationship of manifestations of cryptosporidiosis was carried out among calves that have regular contact with synanthropic rodents (gray rat (Rattus norvegicus), house mouse (Mus musculus), common vole (Microtus arvalis), bank vole (Myodes glareolus)) and birds (rock dove). (Columba livia), house sparrow (Passer domesticus), jackdaw (Coloeus monedula)). In total, 255 calves, 160 rodents and 80 birds were subjected to the study.
The assessment of infestation of calves, rodents and birds was carried out by generally accepted coprological flotation methods, as well as by making native smears with further Ziehl-Neelsen staining. The results obtained were evaluated using statistical methods: analysis of variance, taking into account the Fisher criterion and the Pearson correlation coefficient.
The results of the research showed that in all natural and climatic zones of the Udmurt Republic a high percentage of infection with cryptosporidiosis of calves is recorded.
On the territory of the southern zone, the infection rate of calves with cryptosporidiosis was 62.35%, while in captured mouselike rodents the prevalence of invasion was at the level of 37.25%, and in birds - 20.0%.
In the farms located on the territory of the northern natural and climatic zone of the republic, the degree of infestation of calves reached 41.18%, the infection of rodents was 23.91%. The minimum percentage of detection of cryptosporidium oocysts among synanthropic birds was observed in the north of Udmurtia - 11.77%.
The fact of the dependence of the invasion by the causative agent of cryptosporidiosis of calves on the presence of parasite carriers in farms has been established. According to the results of calculating the correlation coefficient and analysis of variance, a direct close relationship was revealed between the infection of calves and representatives of the synanthropic reservoir - rodents, birds, regularly in contact with agricultural crops. animals.

1. State program for the development of agriculture and regulation of the markets for agricultural products, raw materials and food of August 25, 2017 N 996 [Electronic resource]. URL: https://base.garant.ru/70210644/

2. Ministry of Agriculture and Food of the Udmurt Republic [Electronic resource]. URL: https://udmapk.ru/

3. Diseases of farm animals: monograph / P. A. Krasochko, M. V. Yakubovsky, A. I. Yatusevich [and others]. - Minsk: Biznesofset, 2005. - 800 p. – ISBN 985-6649-43-9. – EDN UGXZCN.

4. Vladyshevsky, D. V. Birds in the anthropogenic landscape / D. V. Vladyshevsky; resp. ed. E. S. Petrenko, Ya. S. Rusanov; USSR Academy of Sciences, Sib. department, Institute of Forest and Wood named after V.I. V. N. Sukacheva. - Novosibirsk: Science, Siberian Branch, 1975. - 199 p.

5. Elizarov, V. V., Elizarov, A. V., Surinsky, D. O., Negative impact of synanthropic birds on the agro-industrial complex and methods of their control. - Text: direct // Young scientist. - 2016. - No. 27 (131). — S. 70-73. — URL: https://moluch.ru/archive/131/36493/

6. Klimova, E. S. Eimeriosis and cryptosporidiosis in cattle / E. S. Klimova, M. E. Mkrtchyan // Modern problems of general and particular parasitology: Proceedings of the III International Parasitological Symposium, St. Petersburg, December 18–20, 2019 of the year. - St. Petersburg: St. Petersburg State Academy of Veterinary Medicine, 2019. - P. 136-139. – EDN OCFOIP.

7. Krylov, M. V. Determinant of parasitic protozoa (human, domestic animals and agricultural plants) / M. V. Krylov. - St. Petersburg: Zool. Institute of the Russian Academy of Sciences, 1996. - 602 p.

8. Kryazhev, A. L. Cryptosporidiosis of calves in dairy farms of the North-West of Russia (epizootology, clinical picture, therapy and prevention): dis. of cand. vet. sciences / A. L. Kryazhev. - M., 2005. - 152 p.

9. Protozoal diseases of animals / L. M. Belova, N. A. Gavrilova, V. A. Shiryaeva [et al.]; author-compiler: Belova L. M., Gavrilova N. A., Shiryaeva V. A., Kuznetsov Yu. E., Loginova O. A., Roberman M. G. - St. Petersburg: St. Petersburg State Academy of Veterinary Medicine medicine, 2019. - 89 p. – EDN XFCFYS.

10. Sokolov, V. E. Taxonomy of mammals: Proc. allowance for university students / V. E. Sokolov. - Moscow: Higher. school, 1973. - Part 2: Detachments: lagomorphs, rodents. - 1977. - 493 p.

11. Jagai, J. S. Seasonality of Cryptosporidiosis: A Meta-Analysis Approach / J.S. Jagai, D.A. Castronovo, J. Monchak et al. // Environ Res. 2009. - Vol. 109 (№ 4). - P. 465–478.

12. Lv, C. Cryptosporidium spp. in Wild, Laboratory, and Pet Rodents in China: Prevalence and Molecular Characterization / Lv C., Zhang L., Wang R. et. al. // Applied and Environmental Microbiology. 2009. – Vol. 75. - P. 7692–7699.

13. Ng-Hublin, J. S. Molecular characterization of Cryptosporidium spp. from wild rats and mice from rural communities in the Philip pines / J. S. Ng-Hublin, G. R. Singleton, . Rya // Infection, Genetics and Evolution. 2013. - Vol. 16. - P. 5–12.