OCORRÊNCIA DO VÍRUS DA RAIVA NA POPULAÇÃO SELVAGEM DE SAGUIS CALLITHRIX GEOFFROYI (HUMBOLDT, 1812) NO SUDESTE DO BRASIL

Background: Zoonosis, which causes acute and lethal encephalitis, is transmitted through the inoculation of the virus present in the saliva of mammals of several species. In Brazil, wild rabies is a challenge for epidemiological surveillance and a significant increase has already been observed in human cases. Some of the main wild reservoirs are: wild dog (Cerdocyon thous), marmosets (Callithrix sp) and hematophagous bats (Desmodus rotundus). Considering cases of positivity in marmosets in the Northeast of Brazil, together with the increasing number of cases in wild animals, this work aimed to survey the occurrence of the virus in a wild population. The animals were necropsied from the tramway ES-060, all of the Callithrix geoffroyi. The material collected for analysis of the rabies virus consisted of brain, which was conditioned and identified for later analysis at the Institute of Agricultural and Forest Defense of Espírito Santo (IDAF). The 44 samples gave negative results. The study suggests that the occurrence of the virus should be investigated in other localities, especially in regions closer to sites that have already been reported cases of rabies, and that the use of trampled animals is feasible for a better understanding of wildlife health.

First report of Gongylonema sp. in a free ranging callitrichid from the Brazilian Atlantic Forest: case report

ABSTRACT This is the first report of parasitism by Gongylonema sp. in a free-ranging callitrichid from the Atlantic forest of Espírito Santo, Brazil. A juvenile male of Geoffroy's marmoset (Callithrix geoffroyi) was euthanized due to poor prognosis, then necropsied. Samples of the tongue were collected for routine histological processing. Microscopically, there were transversal sections of adult nematodes within the epithelial layer of the mucosa of the tongue. Lingual scraping demonstrated a small number of oval embryonated eggs with a thick capsule. The morphology of the adult parasites and the eggs, associated with its location, were compatible with the Spirurida nematode of the genus Gongylonema. Further studies are needed to evaluate the impact of this parasite on free-ranging callitrichid populations.

Leucismo em Callithrix penicillata (É. Geoffroy, 1812) (Primates: Cebidae) em uma área urbana

O gênero Callithrix possui seis espécies todas endêmicas do Brasil, a coloração dentro do grupo é variável, os animais desse gênero caracterizam-se pela presença de tufos auriculares e uma mancha branca na testa, ausente em Callithrix geoffroyi (É. Geoffroy, 1812). Neste estudo, foram registrados durante os meses de dezembro de 2017, janeiro e fevereiro de 2018 indivíduos de Callithrix penicillata com alterações significativas na coloração, provável caso de leucismo em dois indivíduos do mesmo grupo familiar de um grupo encontrada em uma área verde urbana na Zona da Mata Mineira.

Chromosome painting of the red-handed tamarin (Saguinus midas) compared to other Callitrichinae monkeys

Here we present, for the first time, the complete chromosome painting map of Saguinus midas, the red-handed tamarin. Chromosome banding and painting with human chromosome-specific probes were used to compare the karyotype of this species with those of four other Neotropical primates of the subfamily Callitrichinae: Leontopithecus rosalia, Callithrix geoffroyi, C. penicillata, and Mico argentatus. The chromosome painting map of S. midas was identical to that of L. rosalia and other previously studied tamarin species (genera Saguinus and Leontopithecus). The three marmoset species studied (genera Callithrix and Mico) differed in the painting pattern of four human probes (chromosomes 1, 2, 10, and 16). These paints identified the presence or absence of chromosome associations HSA 1/10 and 2/16 in these taxa. By integrating our data with those from the literature, we were able to propose an ancestral Callitrichinae karyotype. The genera Saguinus and Leontopithecus (tamarins) conserve the ancestral Callitrichinae karyotype, while Mico and Callithrix (marmosets) show more derived karyotypes due to chromosome translocations and fissions that occurred during the evolution of these taxa.