Pathomorphological changes in the body of calves in protozoosis, prevention measures

  • Lidiia Kovalenko Sumy National Agrarian University
  • Alexander Kovalenko Sumy Regional Laboratory of the State Service of Ukraine for Food Safety and Consumer Protection
Keywords: oocysts, biochemical analysis, hematological examinations, blood, feces, large intestine, mucous membrane, bravitacoccid, brovaseptol


The problem of establishing the prevalence of protozoa among animals is disclosed in this article. Cryptosporidiosis of calves is widespread in farms of Sumy and Chernihiv regions. The extent of infestation in different areas ranges from 12.4% to 81.4% and averages 41.23% of the surveyed livestock. In different territorial and climatic zones of the location of farms during the survey was almost the same level of involvement of calves from 39.3% to 81.4%. Examination of sick animals revealed the pathogen Cryptosporidium parvus. The duration of infestation and the development of infestation in newborn calves depends in direct proportion to their content and seasonality. From the fourth day of birth, the allocation of oocysts is registered. The maximum number is observed on the seventh day and the figure was 50.8 + 0.47% in winter and from 29.6 + 0.25% to 42.8 + 0.31% in summer. two peaks of invasion extent. The first is registered on the fifth day after the onset of pathogen isolation. On the seventh day, the second wave of oocyst secretion is established. The duration of secretion of Cryptosporidium oocysts in calves is up to 21 days from birth. Veterinary conditions of animals play a significant role in the spread of cryptosporidiosis among susceptible livestock. The accumulation of oocysts in the environment is caused by its constant circulation in livestock facilities for keeping newborn calves. At hematological research the extension efficiency of drugs of coccidiostats at complex application is established. When they are used in the blood of animals to be treated, the amount of hemoglobin, erythrocytes increases. The level of leukocytes and leukogram parameters correspond to the physiological norm in the process of recovery. In laboratory diagnosis, a modified method of segmentation in a solution of surfactants was used. As a means of inhibiting the development of the pathogen, used a complex drug of domestic production Bravitacoccid at a dose of 1.5 g / 10 kg of body weight with vitamin B1 and combined with drugs that stabilize metabolism in animals .. Particular attention was paid to the preparation of premises for maintenance newborn calves, with a preliminary study in the laboratory, washed from the walls, machines, household items, oocyte contamination of the pathogen C. Parvum and other representatives of invasive pathogens.

Author Biography

Alexander Kovalenko, Sumy Regional Laboratory of the State Service of Ukraine for Food Safety and Consumer Protection

Ph.D in Vet. Sciences


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How to Cite
Kovalenko, L., & Kovalenko, A. (2020). Pathomorphological changes in the body of calves in protozoosis, prevention measures. Bulletin of Sumy National Agrarian University. The Series: Veterinary Medicine, (4 (51), 11-18.