Hematologic and blood chemistry values of healthy Cebus flavius kept in northeast of Brazil.

BACKGROUND: Cebus flavius is a New World Monkey found in the northeast of Brazil, listed as critically endangered. So far, no hematologic or blood chemistry reference intervals have been determined for this species. METHODS: Hematologic and biochemistry reference values were determined for 20 clinically healthy C. flavius, kept in captivity in the Wild Animals Screening Center, João Pessoa, Paraíba, Brazil. The influence of gender and age on these variables was evaluated. RESULTS: Considering sex, significant differences are found for the total count of erythrocytes, hematocrit, hemoglobin, mean corpuscular hemoglobin, and creatine kinase. Regarding the age, levels of creatinine and alanine aminotransferase are significantly higher in adults and levels of creatine kinase and calcium are significantly higher in juveniles. Considering age, no hematologic differences were found. CONCLUSIONS: The factors age and gender had influence on some hematologic and blood chemistry variables and should not be neglected for a correct blood interpretation.

Hematological profile of captive bearded capuchin monkeys (Sapajus libidinosus) from Northeastern Brazil / Perfil hematológico de macacos-prego (Sapajus libidinosus) do nordeste do Brasil

ABSTRACT: Bearded Capuchin or Black-striped Capuchin monkeys (Sapajus lidibinosus) are New World robust capuchin monkeys widely used in medical research. Few data are available concerning hematological reference values for these species, with no studies available from the Northeast region in Brazil. The aim of this study was to determine the hematological reference values for healthy bearded capuchin monkeys and to analyze the influence of sex and age factors. Blood samples were collected from 50 healthy bearded capuchin monkeys housed in captivity. These were analysed for total erythrocyte, hemoglobin, leukocyte and platelet count, packed cell volume (PCV), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin concentration (MCHC). When considering the age factor, significant differences were reported for total erythrocyte count, PCV, hemoglobin, total leucocytes, band neutrophils, eosinophils and lymphocytes (higher in juveniles). Significant sex-associated differences were noted for total erythrocyte count, PCV, hemoglobin (higher in males) and number of lymphocytes (higher in females).We have reported for the first time the hematological profile of bearded capuchin monkeys in captivity in the state of Paraíba, Brazil. These results can contribute for a better understanding of the normal physiology of capuchin monkeys, while demonstrating that factors such as sex and age influence hematological parameters should be taken into consideration in the hematological evaluation of this species.

RESUMO: Os macacos-prego (Sapajus lidibinosus) são macacos capuchinhos robustos do Novo Mundo amplamente utilizados na pesquisa médica. Poucos dados estão disponíveis sobre valores de referência hematológicos para essas espécies, e não há estudos na região Nordeste no Brasil. O nosso objetivo foi determinar os valores de referência hematológicos para macacos-prego saudáveis e analisar a influência de fatores como o sexo e a idade. Foram coletadas amostras de sangue de 50 macacos-prego saudáveis alojados em cativeiro. Determinaram-se as contagens de eritrócitos, hemoglobina, leucócitos e plaquetas, hematócrito, volume corpuscular médio (MCV), hemoglobina corpuscular média (MCH) e concentração média de hemoglobina corpuscular (MCHC). Foram encontradas diferenças significativas relacionadas à idade para a contagem total de eritrócitos, hematócrito, hemoglobina, leucócitos totais, neutrófilos em banda, eosinófilos e linfócitos (maior em juvenis). Diferenças significativas associadas ao sexo foram observadas para a contagem total de eritrócitos, hematócrito, hemoglobina (maior nos machos) e número de linfócitos (maior nas fêmeas). Relatamos o primeiro perfil hematológico de macacos-prego alojados em cativeiro no estado da Paraíba, Brasil. Estes resultados contribuem para uma melhor compreensão da normal fisiologia dos macacos-prego e demonstram que fatores como sexo e a idade têm influência e devem ser considerados na sua avaliação hematológica.