Hematological adaptation in Holstein calves during the neonatal period

Autor: Juliana França dos Reis, Renata Leite Freitas, Cynthia Pereira da Costa e Silva, Camila Costa Baccili, Vinicius Alvim Passos Baldacim, Mitika Kuribayashi Hagiwara, Sylvia Marquart Fontes Novo, Viviani Gomes
Rok vydání: 2015
Předmět:
Zdroj: Brazilian Journal of Veterinary Research and Animal Science, Vol 52, Iss 3 (2015)
Brazilian Journal of Veterinary Research and Animal Science; Vol. 52 Núm. 3 (2015); 212-216
Brazilian Journal of Veterinary Research and Animal Science; Vol. 52 No. 3 (2015); 212-216
Brazilian Journal of Veterinary Research and Animal Science; v. 52 n. 3 (2015); 212-216
Brazilian Journal of Veterinary Research and Animal Science; V. 52 N. 3 (2015); 212-216
Brazilian Journal of Veterinary Research and Animal Science
Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)
instacron:USP
ISSN: 1678-4456
1413-9596
DOI: 10.11606/issn.1678-4456.v52i3p212-216
Popis: Foi avaliado o perfil hematológico de bezerros da raça Holandesa durante o primeiro mês de vida. Foram colhidas 208 amostras de sangue total de 26 bezerras(os) do nascimento aos trinta dias de vida. Os valores hematológicos foram determinados por sistema automatizado associado à contagem diferencial dos leucócitos por metodologia manual. Foram detectadas variações nos componentes do hemograma do nascimento aos 30 dias de vida, exceto para os teores de hemoglobina (Hb) e concentração hemoglobínica corpuscular média (CHCM). Os maiores valores do hematócrito, volume corpuscular médio (VCM) e hemoglobina corpuscular média (HCM) foram observados ao nascimento, com decréscimo nos momentos subsequentes. Nos primeiros dias de vida foi observada leucocitose por neutrofilia e eosinopenia e com o avançar da idade houve aumento gradativo dos linfócitos. Com base nos resultados obtidos pode-se concluir que a adaptação dos bezerros no período pós-neonatal foi caracterizada por variações nos componentes do hemograma, observando-se hemoconcentração e padrão leucocitário compatível com resposta aos glicocorticoides até o 4º dia de vida, responsável pela relação neutrófilo-linfócito > 1,0 ao nascimento. The aim of this study was to evaluate the hematological profile of Holstein calves during the first month of life. Blood samples were harvested (n = 208) from 26 calves, from birth until 30 days of life. Hematologic values were determined by an automatic system associated with differential leukocyte count by manual methods. Variations in the erythrogram components were detected from birth up to the 30th day of life, except for hemoglobin (Hb) concentration and Mean Corpuscular Hemoglobin Concentration (MCHC). At birth, higher values were observed for hematocrit, Mean Corpuscular Volume (MCV) and Mean Corpuscular Hemoglobin (MCH) that decreased in subsequent moments. During the first days of life, leukocytosis was found due to neutrophilia and eosinopenia. A gradual increase of lymphocytes with the increase of age was also observed. Finally, the present research showed that the first month of life is a hematological adaptation period. Based on the results, it detected that blood component variations, characterized by hemoconcentration and leukocyte prolife compatible with glucocorticoids response up to the 4th day of life, were responsible for neutrophil lymphocyte ratio > 1.0 at birth.
Databáze: OpenAIRE
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