SEASONAL DYNAMICS OF PIGLET INVASION BY CRYPTOSPORIDIUM PARVUM UNDER CONDITIONS OF INDUSTRIAL PIG FARMING IN VOLOGDA REGION
Abstract
Objective of research: the purpose of this research is to study the infestation of young pigs by Cr. parvum in Vologda region depending on the season. Materials and methods: Seasonal dynamics of piglet invasion by cryptosporidia were studied during 2014 on the basis of two big pig farm complexes in Vologda and Cherepovetsk districts of Vologda region. Faeces from pigs up to one month of age mostly with clinical signs of diarrhea of varying severity were investigated on a monthly basis. Groups were formed out of experimental pigs (20–25 head in each) selected in each farm by the analogue principle. In total 282 pigs were examined. The faecal examination was performed using the direct smear method with the following Ziehl–Neelsen stain, also known as the acid-fast stain. Results and discussion: The research reveals that the diagnosis of pig cryptosporidiosis was confirmed for both experimental pig farms. Piglets were infected with Cryptosporidium oocysts during all seasons of the year. The extensity of Cryptosporidium infection in different months varied within 30,4 – 62,5 %. The total infestation by C. parvum was 45,7 %. When studying the effect of seasonality on cryptosporidiosis infestation of young pigs, it was found that in all seasons Cryptosporidium infection was registered in approximately equal number of animals at the age up to one month. The significant increase in extensity and intensity of infection was observed in autumn and spring.
About the Authors
A. S. Novikov
Vologda State Dairy Farming Academy named by N.V. Vereshchagin
160555 Vologda, Molochnoye, 2 Shmidt St.
Russian Federation
Russian Federation
A. L. Kryazhev
Vologda State Dairy Farming Academy named by N.V. Vereshchagin
160555 Vologda, Molochnoye, 2 Shmidt St.
Russian Federation
Russian Federation
References
1. Beyer T.V., Sidorenko N.V. On another biological feature of coccoides of the genus Cryptosporidium (Sporozoa. Apicomplexa). Parazitologiya [Parasitology], 1993, vol. 27, no. 4, pp. 309 – 316.
2. Bochkarev I.I. Kriptosporidioz: epizootologiya, simptomokompleks bolezni, ul'trastruktura sryptosporidium parvum, osobennosti razvitiya khozyain – parazit – kletka – embrion, printsipy lecheniya i profilaktiki Avtoref. diss. doct. biol. nauk. [Cryptosporidiosis: epizootiology, disease symptom, ultrastructure С. parvum. Features of development of host -parasite –cell- embryo. Principles of treatment and prevention. Abst. Doct. thesis vet. med.]. SPb., 1996. 39 p.
3. Krylov M.V. Vozbuditel' protozoynykh bolezney domashnikh zhivotnykh i cheloveka [Causative agents of protozoan diseases in domestic animals and humans]. SPb., 1994, vol. 1, pp. 114 – 118.
4. Kryazhev A.L. Kriptosporidioz telyat v khozyaystvakh molochnoy spetsializatsii Severo-Zapada Rossii Avtoref. diss… kand. vet. nauk [Cryptosporidiosis in calves in dairy farms of Northwestern Russia. Abst. of PhD thesis in vet. med ]. M, VIGIS, 2005. 26 p.
5. Kryazhev A.L., Lemekhov P.A. Kriptosporidioz telyat v khozyaystvakh mo-lochnoy spetsializatsii Severo-Zapadnogo regiona Rossii [Cryptosporidiosis in calves in dairy farms of Northwestern Russia]. Vologda–Molochnoe, ITs VGMKhA, 2010. 111 p.
6. Nikitin V.F. Epizootic process at cryptosporidiosis in calves. Mat.dokl.nauchn.konf.: Teoriya i praktika bor'by s parazitarnymi boleznyami [ Proc. of sci.- pract. conf. “Theory and practice of struggle against parasitic diseases"]. M., VIGIS, 2004, pp. 265 – 267.
7. Novikov A.S., Kryazhev A.L. Cryptosporidiosis in pigs under conditions of commercial pig breeding in Vologda region. Mat. dokl. nauchn. – proizv. konf. «Teoriya i praktika bor'by s parazitarnymi boleznyami» [Proc. of sci.- pract. conf.“Theory and practice of struggle against parasitic diseases"]. M., VIGIS, 2014, no. 15, pp. 200 – 202.
8. Taychinov U.G., Durdusov S.D. Epizooticheskiy protsess pri kriptosporidioze. [Epizootic process at cryptosporidiosis]. Elista, 1996. 67 p.
9. Shibalova T.A., Borovikova N.P. Cryptosporidiosis in domestic animals and wildlife. Tez. dokl. I s"ezda vsesoyuzn. konf.: Problemy patologii i ekologii vzaimosvyazi bolezney dikikh teplokrovnykh i s.-kh. zhivotnykh. [Proc. of the 1st All-Union Congress "Issues of pathology and ecology in relationship between diseases in wild warm-blooded and agricultural animals]. M, 1988, pp.113 – 114.
10. O’Donoghue P.J. Cryptosporidium infections in man, animal, birds and fish Austral. Vet. J., 1985, vol. 62. No.8, pp. 253 – 258.
Review
For citations:
Novikov A.S., Kryazhev A.L. SEASONAL DYNAMICS OF PIGLET INVASION BY CRYPTOSPORIDIUM PARVUM UNDER CONDITIONS OF INDUSTRIAL PIG FARMING IN VOLOGDA REGION. Russian Journal of Parasitology. 2015;(4):43-48. (In Russ.)
Views:
210
Email this article 