FALHA DE TRANSFERÊNCIA DE IMUNIDADE PASSIVA E SUA RELAÇÃO COM A OCORRÊNCIA DE DOENÇAS NO PERÍODO NEONATAL

• DOI: https://doi.org/10.22533/at.ed.9252404067

• Palavras-chave: Imunidade passiva. Doenças neonatais. Imunoglobulinas.

• Keywords: Passive immunity. Neonatal diseases. Immunoglobulins.

• Abstract: Brazil has a herd of approximately 218.2 million cattle and milk production reached the mark of 35.4 billion liters, values which express the importance of cattle raising in the country. For effective disease control, animals need a good transfer of this passive immunity, as colostrum performs this function. The study aims to evaluate the transfer of passive immunity and relate it to the occurrence of diseases in the first month of life. Forty-two calves from 6 farms located in the region of Vale do Aço – MG was evaluated. The main parameters evaluated consist of heart and respiratory rate, measurement of rectal temperature, observation of apparent mucosa, palpation of lymph nodes, and umbilical structures. The presence of diarrhea, omphalitis, and bovine respiratory disease was evaluated. In the analytical analyzes the hematocrit, fibrinogen, and refractometry were evidenced, later, the data were analyzed, with descriptive statistical analysis of the data. In newborns evaluated during the first week of life in the Region of Vale do Aço, it was possible to notice that no animal obtained a value lower than 5.5g/dl. It is possible to affirm that there was a satisfactory transfer of passive immunity during the first week of life in all studied animals. The presence of diarrhea was observed in 14.2% of the animals (6/42) and omphalitis in 4.7% of the animals (2/42). The efficient transfer of immunoglobulins, transmitted to calves suckled with colostrum in the first days of life, was positive for the immunological protection of the animals. Although some animals have diarrhea and omphalitis, they can be justified by environmental factors, so further studies are needed.