RESUMO
This paper aims to describe the hematological and biochemical values of wild hybrid marmoset (Callithrix penicillata and C. geoffroyi) found in a forest zone of Southeastern Brazil. The marmosets were anaesthetized using ketamine and xylazine hydrochloride. Blood samples (0.5-1mL) were collected through the venipuncture of the femoral vein. Hematological and biochemical analyses were performed using automated counters and biochemical kits. The comparison for sex (adult males vs. adult females) and age class (juvenile vs. adult) physiological data and weight were analyzed through Student's t-test for independent samples. Significant differences between sex were observed in erythrocytes (P<0.01) and hemoglobin (P<0.05). The present study provides essential baseline information on the normal blood values of wild hybrid marmosets, the data of which are not readily accessible from the existing body of scientific literature on nonhuman primates.
Este artigo objetiva descrever os valores hematológicos e bioquímicos de saguis híbridos selvagens (Callithrix penicillata e C. geoffroyi) encontrados em uma zona florestal do Sudeste do Brasil. Os saguis foram anestesiados usando cetamina e hidrocloridrato de xilazina. As amostras de sangue (0,5-1mL) foram coletadas por punção da veia femoral. As análises hematológicas e bioquímicas foram realizadas por meio de contadores automáticos e kits bioquímicos. A comparação dos dados fisiológicos e pesos para o gênero (machos vs. fêmeas) e a classe de idade (juvenil vs. adulto) foram analisados através do teste t de Student para amostras independentes. Observaram-se diferenças significativas de gênero para eritrócitos (P<0,01) e hemoglobina (P<0,05). O presente estudo fornece informação básica essencial sobre os valores hematológicos normais de saguis híbridos selvagens, dados que não são prontamente disponíveis na literatura científica atual sobre primatas não humanos.
RESUMO
The objective of this study was to identify the helminth fauna in hybrid, non-native marmosets, through analysis of fecal samples. The study involved 51 marmosets (genus Callithrix) from five groups living in places with levels of human impact in Viçosa-MG. The marmosets were caught using a multiple-entrance trap and were anaesthetized. Feces were collected, refrigerated and analyzed by means of the sedimentation technique (Hoffmann-Pons-Janner). Eggs and parasites were identified, but not counted. Most of the marmosets (86%) were parasitized by at least one genus of helminths. Among the infected marmosets, 37% presented co-infection. The intestinal helminths comprised four different taxa: Primasubulura jacchi, Ancylostomatidae, Prosthenorchis sp. and Dilepididae. P. jacchi and Ancylostomatidae had higher prevalences (> 80% and > 40%, respectively) and were found in all marmoset groups. Dilepididae species were found in almost all the groups, but only accounted for around 30% of the marmosets. Prosthenorchis sp. showed a relatively low prevalence (< 10%) and was only found in one group. Although two parasites are commonly found in marmosets and other primates (P. jacchi and Prosthenorchis sp.), our study is the first record for Ancylostomatidae and Dilepididae. Factors like marmosets' feeding behavior and their contact with humans and other species of nonhuman primates seem to be determinants of infection among marmosets.
