Effectiveness of the mass use of deltamethrin-impregnated dog collars for preventing transmission of canine leishmaniasis by Lutzomyia spp.: A cluster randomized controlled trial.

Visceral leishmaniasis (VL) is a zoonosis that greatly impacts public health, especially in developing countries. The effectiveness of deltamethrin-impregnated dog collars for preventing transmission of canine leishmaniasis (CanL) by the sand fly Lutzomyia spp. in countries with high incidence of the disease, such as Brazil, remains unknown. A cluster randomized controlled trial was carried out to evaluate the effectiveness of these collars in preventing infection of dogs with Leishmania infantum. Two areas were selected in a municipality endemic for VL in Brazil: an experimental area (EA) and a control area (CA). In both areas, blood samples were collected from dogs for detection of CanL. Seronegative dogs from the EA received collars impregnated with deltamethrin 4%. After six months, the dogs were retested for CanL and the incidence of the disease, the relative risk, and the effectiveness of collaring determined. In the baseline survey, 1020 dogs from the EA and 589 from the CA were examined. The prevalence calculated for EA was 4.41% (CI95% 3.27-5.91), and 7.13% (CI95% 5.25-9.59) for CA. In the second evaluation, 454 dogs from the EA and 292 from the CA were examined. The person-time incidence calculated for EA was 3.51% (CI95% 1.30-7.48), and for CA was 11.81% (CI95% 7.03-18.23). The difference between the calculated incidences was statistically significant (p = 0.009). The relative risk was 0.2972 (CI95% 0.1204-0.7339; p = 0.009), and the efficacy of the proposed measure was estimated in 70.27%. This report evaluated the effectiveness of the mass use of deltamethrin-impregnated dog collars in areas of transmission of VL by Lutzomyia spp. Collaring was able to protect dogs and may represent an effective strategy that could be implemented to control infection in both dogs and humans in Brazil and perhaps other countries where Lutzomyia spp. is the main vector of the disease.

Vaccinia Virus among Domestic Dogs and Wild Coatis, Brazil, 2013-2015.

To determine their potential role as a source of human infection, we tested domestic dogs (urban) and wild coatis (wild) in Brazil for vaccinia virus. Our findings of positive neutralizing antibodies and quantitative PCR results for 35/184 dogs and 13/90 coatis highlight a potential public health risk.

Diagnóstico de animais ilegais recebidos no centro de triagem de animais silvestres de Belo Horizonte, Estado de Minas Gerais, no ano de 2011 / Diagnosis of illegal animals received at the wildlife rehabilitation center of Belo Horizonte, Minas Gerais State, Brazil in 2011

O centro de triagem de animais silvestres em Belo Horizonte (CETAS-BH) é um dos órgãos responsáveis pelo recebimento de animais silvestres em Minas Gerais (MG). O conhecimento da fauna mantida ilegal é ferramenta importante para a conservação dos animais silvestres, pois permite o aprimoramento da educação ambiental e das ações fiscalizadoras. Objetivou-se diagnosticar as espécies da fauna silvestre apreendidas ou entregues voluntariamente no CETAS-BH e analisar espacialmente sua distribuição. As espécies foram identificadas e classificadas de acordo com a chave taxonômica e o risco de extinção. Na análise descritiva espacial, foram identificadas as coordenadas geográficas dos municípios dos animais para a construção dos mapas de distribuição e de densidade de Kernel. No ano de 2011, foram recebidos 7.426 animais vivos, dos quais 91,5% eram aves, 7% répteis e 1,5% mamíferos. Verificou-se ampla variedade de espécies (166), correspondendo às aves a maioria (79,5%). As espécies mais recebidas foram Sicalis flaveola e Saltator similis. Do total de espécies recebidas, 15% estavam ameaçadas de extinção. A principal procedência foi apreensão (82,7%) e, delas, 79% foram realizadas pela Polícia Militar do Meio Ambiente. Os animais eram de 94 municípios de MG. A análise espacial identificou a Região Metropolitana de BH como o local de maior concentração de ocorrências. A partir dos resultados obtidos, espera-se o aprimoramento e a intensificação das ações de educação ambiental e de fiscalização para essas áreas específicas.

The wildlife rehabilitation center in Belo Horizonte (CETAS - BH) is one of the responsible for the receipt of wild animals in Minas Gerais (MG). The knowledge about the animals traffic is an important instrument for the wild species conservation as it allows the improvement of environmental education and the enforcement actions. The research aimed to diagnose the species of wildlife seized or voluntarily surrendered in CETAS-BH and analyze their spatial distribution. The species were identified and classified according to the taxonomic key and the risk of extinction. Descriptive spatial analysis identified the geographic coordinates of the cities where the animals were found to make maps showing their spatial distribution and the Kernel density. In 2011 were received 7426 live animals, 91.5 % of these birds, 7% reptiles and 1.5% mammals. It was found a range of species (166), most of them birds (79.5%). The most received species were Sicalis flaveola and Saltator similis. Fifteen percent of the species were endangered. The main category of receiving was the seizure (82.7%), and 79% of them were conducted by Environment Police. The animals were from 94 cities in the state of Minas Gerais. The spatial analysis identified the Belo Horizonte Metropolitan Region as the region with the highest concentration of occurrences. In this context, this study suggests the improvement and intensification of environmental education and supervision in those specific areas.

Carriage of Clostridium difficile in free-living South American coati (Nasua nasua) in Brazil.

The objective of this study was to isolate and characterize Clostridium difficile strains in stool samples from a wild urban mammal, a South American coati (Nasua nasua) in Brazil. Forty-six free-living N. nasua were trapped, and stool samples were collected. C. difficile was isolated from three (6.5%) sampled animals, two strains were toxigenic (A+B+CDT-, PCR ribotype 014/020 and 106) and one was non toxigenic (A-B-CDT-, PCR ribotype 053). The present work confirms that ring-tailed coati (N. nasua) could harbor C. difficile strains, including those PCR ribotypes commonly reported in C. difficile infection in humans.

Clostridium difficile and Clostridium perfringens from wild carnivore species in Brazil.

Despite some case reports, the importance of Clostridium perfringens and Clostridium difficile for wild carnivores remains unclear. Thus, the objective of this study was to identify C. perfringens and C. difficile strains in stool samples from wild carnivore species in Brazil. A total of 34 stool samples were collected and subjected to C. perfringens and C. difficile isolation. Suggestive colonies of C. perfringens were then analyzed for genes encoding the major C. perfringens toxins (alpha, beta, epsilon and iota) and the beta-2 toxin (cpb2), enterotoxin (cpe) and NetB (netb) genes. C. difficile strains were analyzed by multiplex-PCR for toxins A (tcdA) and B (tcdB) and a binary toxin gene (cdtB) and also submitted to a PCR ribotyping. Unthawed aliquots of samples positive for C. difficile isolation were subjected to the detection of A/B toxins by a cytotoxicity assay (CTA). C. perfringens was isolated from 26 samples (76.5%), all of which were genotyped as type A. The netb gene was not detected, whereas the cpb2 and cpe genes were found in nine and three C. perfringens strains, respectively. C. difficile was isolated from two (5.9%) samples. A non-toxigenic strain was recovered from a non-diarrheic maned wolf (Chrysocyon brachyurus). Conversely, a toxigenic strain was found in the sample of a diarrheic ocelot (Leopardus pardallis); an unthawed stool sample was also positive for A/B toxins by CTA, indicating a diagnosis of C. difficile-associated diarrhea in this animal. The present work suggests that wild carnivore species could carry C. difficile strains and that they could be susceptible to C. difficile infection.

Clostridium difficile-associated diarrhea in an ocelot (Leopardus pardalis).

The aim of this study is to report a case of Clostridium difficile-associated diarrhea in an ocelot (Leopardus pardalis) in the state of Mato Grosso do Sul, Brazil. The animal, a 24-month-old male, was referred to the Centro de Reabilitação de Animais Silvestres (CRAS) with a history of having been run over and tibia and fibula fractures. After a surgery to repair the fractures, the ocelot underwent antibiotic therapy with two doses of sodium cefovecin, during which he presented with diarrhea. A stool sample was positive for A/B toxins by a cytotoxicity assay, and a toxigenic strain of C. difficile was isolated. No other enteropathogens were detected. The association between the history, clinical signs and laboratory exams confirmed the diagnosis of C. difficile-associated diarrhea. The present report confirms C. difficile as a potential pathogen for wild felids and suggests that the C. difficile-associated diarrhea should be considered in diarrhea cases, especially when the clinical signs began after antimicrobial use.