Abstract
This study aimed to evaluate the frequency of Neospora caninum antibodies in rodents from the Island of Fernando de Noronha, Brazil, and to contribute to epidemiological data on neosporosis in this region. Blood samples were collected from 154 black-rats (Rattus rattus) and 12 rock-cavies (Kerodon rupestris). The search for anti-N. caninum antibodies was made using the NAT technique, with a cut-off of 1:20. The frequency of positive mice was 5.19% (8/154 - 1:20 titer) and all rock-cavies were negative. The low frequency of antibodies against N. caninum in rodents found in the Island shows the low contamination of the environment where these animals live.
Highlights
This study aimed to evaluate the frequency of Neospora caninum antibodies in rodents from the Island of Fernando de Noronha, Brazil, and to contribute to epidemiological data on neosporosis in this region
Neospora caninum is an intracellular, cyst-forming parasite responsible for the disease known as neosporosis, which causes reproductive and neurological conditions mainly in cattle and dogs, being the latter and other canids species considered as definitive hosts (Dubey et al 2007)
On the Island of Fernando de Noronha the presence of dogs is limited to urban areas and there is no contact of these animals with refugee species in the forests, such as rats and rockcavies, which may explain the low frequency of antibodies to N. caninum detected in this study, corroborating with the findings reported by Lima et al (2018) in wild cats (Felis catus) on the Island
Summary
This study aimed to evaluate the frequency of Neospora caninum antibodies in rodents from the Island of Fernando de Noronha, Brazil, and to contribute to epidemiological data on neosporosis in this region. This is the first report of the presence of anti-N. caninum antibodies in Rattus rattus on the Island of Fernando de Noronha, being one of the few studies of this issue in this and other species of rodents in the world.
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