BackgroundArboviruses and protozoans can cause neurologic disorders in horses. In Brazilian Amazon, several horses presenting signs compatible with disorders caused by these infectious agents have been observed.ObjectiveTo contribute to the knowledge of this epidemiological picture, we sought to construct a serological diagnostic panel for neurotrophic infectious agents in local horses.Material and methodsA total of 213 blood samples from horses were collected from 29 farms in three municipalities. Samples were evaluated and considered positive when they met the following criteria: titers ≥ 1:80 with the indirect fluorescent antibody test (IFAT) for apicomplexan protozoans; positive recombinant enzyme-linked immunosorbent assay (ELISA) with subsequent titers ≥ 1:10 by the PRNt for viruses; and detection under direct microscopic examination for Trypanosoma evansi.ResultsNo horses were found to be infected by T. evansi, and only two were infected Toxoplasma gondii and/or Neospora spp. The highest protozoan infection rate was observed for Sarcocystis neurona (40.3%; n = 86/213). Among the positive ELISA samples tested by the plaque reduction neutralization test (PRNT90), 92% (n = 76/83) were positive for St Louis Encephalitis virus, 43% (n = 6/14) were positive for West Nile virus and 33% (n = 16/48) were positive for Mayaro virus. Eighteen percent (n = 39/213) of horses were co-infected by S. neurona and at least one arbovirus, particularly SLEV and/or MAYV.ConclusionSamples positive for SLEV associated with S. neurona, including samples from horses that had recovered from neurological signs were frequent, and must be considered when investigating the possible causes of neurological diseases in South Roraima horses.

Este resumo visa trazer as contribuições dos trabalhos de pesquisa e formação realizados pelo GADS (Grupo Atividade Docente e Subjetividade), grupo de pesquisa coordenado pela Profa. Dra. Wanda Maria Junqueira de Aguiar composto por mestrandos, doutorandos, alunos de iniciação científica e de pós-doutorado, além de professores da Pontifícia Universidade Católica de São Paulo em seu Programa de Estudos Pós-Graduados em Educação: Psicologia da Educação. No âmbito da pesquisa e formação o grupo vem se empenhando na produção de

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Toxoplasma gondii and Neospora spp. are protozoa that have a significant impact on animal health due to the diseases they cause in domestic and wild animals. The aim of the present study was to investigate the presence of antibodies against T. gondii and Neospora spp. in cats from northern Brazil. Serum samples were collected from 180 cats in the municipality of Araguaína, Tocantins and used to evaluate the presence of anti-T. gondii and anti-Neospora spp. antibodies using the indirect fluorescent antibody test, with a cutoff of 1:64 and 1:25, respectively. The association between infection and individual animal characteristics (age, sex, origin, breed, and clinical signs) was tested using univariate analysis, followed by multivariate logistic regression. We found that 48.3% (87/180) of the animals had anti-T. gondii (95% CI: 40.8%–55.90%) and 3.9% (7/180) had anti-Neospora spp. (95% CI: 1.6%–7.8%) antibodies. There was no association between age, sex, breed origin, clinical signs, and seropositivity for T. gondii. Cats of defined breeds were more likely to be infected by Neospora spp. (OR = 10.7). Therefore, we found a high rate of seropositivity for T. gondii and a high rate of occurrence of Neospora infections in cats from the Araguaína region. The exposure of the feline population to the studied coccidia indicates the need to monitor the feline population for these infections and underscores the importance of effective sanitary measures against such pathogens.

RESUMO O estado do Amazonas enfrenta atualmente um aumento do seu rebanho bovino. Por conter em seu território muitas áreas destinadas a fins conservacionistas surge a necessidade de se pensar acerca do uso da terra. Para entender os efeitos da pecuária sobre as áreas protegidas é necessária a compreensão de sua dinâmica quando desenvolvida dentro ou próxima destas áreas. Este estudo visou contribuir com o esclarecimento desta problemática analisando o tipo de criação desenvolvido na Reserva de Desenvolvimento Sustentável (RDS) do Uatumã (AM). Na RDS, a pecuária é marcada pelos baixos índices zootécnicos. Técnicas de manejo não são desenvolvidas devido à falta de financiamentos e de apoio na extensão rural. Excetuando-se a vacinação contra a febre aftosa, nenhum tipo de apoio ou incentivo lhes é concedido. O arranjo espacial da atividade é definido em grande medida pelas áreas de pastagem. A atividade depende essencialmente da estrutura familiar e do nível de capitalização do produtor. Após a criação da RDS os custos das relações de trabalho foram profundamente alterados. A relação que o poder público mantém com os moradores da RDS tem dado mais ênfase à repressão, proibição e normatização e oferece poucas alternativas substitutivas às atividades proibidas em virtude da criação da área protegida. Palavras-chave: Amazônia; pecuária; unidade de conservação. ABSTRACTThe Amazonas (state, Brazil) is now facing a sharp increase of your cattle. Because it contains a lot of land in its territory to conservation purposes there is a need to think about land use, since the existence in the same space for different purposes that require use of natural resources. To understand the effects of livestock on protected areas is necessary to understand its dynamics when developed on or near these areas. This paper aims to analyze the type of livestock developed in the Sustainable Development Reserve (RDS) Uatumã (AM). In RDS, the livestock sector is marked by low indices. Management techniques are not developed due to lack of funding and support for the rural extension. Except for vaccination against FMD, any support or encouragement is given to them. The spatial arrangement of the activity is defined largely by the grazing areas. The activity depends on the family structure and level of capitalization of the producer. After creating the RDS costs of labor relations have been profoundly altered. The relationship that the government has with the residents of protect area has been more emphasis on repression, prohibition and regulation, and offers few alternatives to substitute activities prohibited by the establishment of the Reserve.

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