Advances in Animal and Veterinary Sciences

Short Communication
Adv. Anim. Vet. Sci. 8(s2): 7-11
Http://dx.doi.org/10.17582/journal.aavs/2020/8.s2.7.11
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Karina Sidorenko1*, Manya Mkrtchyan1, Yuri Kuznetsov1, Ekaterina Klimova2

1Saint Petersburg State University of Veterinary Medicine, Saint Petersburg, Russia; 2Izhevsk State Agricultural Academy, Izhevsk, Russia.

Abstract | Questions of the influence of associations of protozoa of the genus Eimeria, depending on the intensity of infection on the organism of rabbits of various breeds, remain relevant. The object of the study was rabbits of the Soviet chinchilla breed (SCh * SCh) and its hybrid with the Californian breed (SCh * C) at the age of 40 days. As part of the experiment, formed four groups of analogs of rabbits, six animals in each: purebred (SCh * SCh) and hybrids (SCh * C) in the experimental (invasive) and control (intact) groups. The rabbits of experimental groups infected by a dose of 50-60 thousand oocysts per head with the associations of the Eimeria species E. Perforans and E. irresidua. To establish the pathogenic effect of parasites, we determined the meat productivity, carried out a veterinary and sanitary assessment of carcasses and linear measurements of the length of the intestines, as well as histological studies of the walls of the small and large intestines, liver and spleen of rabbits of these breeds. The research results showed that with a low infection rate of 50-60 thousand oocysts per head, the maximum live weight gain and slaughter yield of carcasses decrease in rabbits of a hybrid breed (SCh x C), despite the preservation of the marketable appearance of the body. In histological sections of the small intestine, at the sites of merontslocalization and merozoites, has found damaged enterocytes, and accumulations of lymphocytes, and eosinophils.

Keywords | Rabbits, Eimeria, Breed, Soviet chinchilla, Californian, Hybrid