Considering the zoonotic potential of tick-borne disease (TBD) agents and the fact that dogs may act as sentinels for human infection, the aim of the present study was to determine the seroprevalence of TBD agents and risk factors for exposure in two different canine populations from Parana State, Southern Brazil. A total of 138 dog serum samples from urban (UA) (n=68) and rural (RA) (n=70) areas were tested with commercial ELISA rapid test for Anaplasma phagocytophilum, Ehrlichia canis and Borrelia burgdorferi antibodies and indirect immunofluorescence assay (IFAT) for Babesia vogeli. An overall of 92/138 (66.7%) dogs, being 62/68 (91.2%) from UA and 30/70 (42.9%) from RA, were seropositive for at least one TBD agent. From the total number of dogs, sixty-two were positive for E. canis (44.9%), 19 (13.8%) for A. phagocytophilum, and 64 (46.4%) for B. vogeli. Anti-B. burgdorferi antibodies were not detected. Dogs from UA showed a higher percentage of tick infestation (p = 0.0135) and were highly associated with seropositivity to E. canis (p = 0.000005), A. phagocytophilum (p = 0.0001), and B. vogeli (p = 0.0012). In summary, the findings indicate that dogs from urban areas present higher potential risk exposure to TBD pathogens than those from rural areas.Keywords: Ehrlichia canis, Babesia vogeli, Anaplasma phagocytophilum, Borrelia burgdorferi, serology, Parana. ResumoConsiderando o potencial zoonótico das doenças transmitidas por carrapatos (DTCs) e que os cães podem atuar como sentinelas para infecções em humanos, os objetivos deste estudo foram determinar a soroprevalência de agentes das DTCs e fatores de risco para a exposição em duas diferentes populações caninas do Estado do Paraná, região Sul do Brasil. Um total de 138 amostras de soro de cães de área urbana (AU) (n = 68) e rural (AR) (n = 70) foram testadas utilizando um teste de ELISA comercial rápido para detecção de anticorpos contra Anaplasma phagocytophilum, Ehrlichia canis e Borrelia burgdorferi e imunofluorescência indireta (IFI) para Babesia vogeli. Um total de 92/138 (66,7%) cães, sendo 62/68 (91,2%) da AU e 30/70 (42,9%) da AR, foram soropositivos para pelo menos um agente. Do número total de amostras, sessenta e duas (44,9%) foram positivas para E. canis, 19 (13,8%) para A. phagocytophilum e 64 (46,4%) para B. canis vogeli. Anticorpos anti-B. burgdorferi não foram detectados. Os cães da AU apresentaram o maior percentual de infestação por carrapatos (p = 0,0135) e foram altamente associados com a positividade para E. canis (p = 0,000005), A. phagocytophilum (p = 0,0001) e B. vogeli (p = 0,0012). Em resumo, nossos achados indicam que cães de áreas urbanas têm um maior risco potencial de exposição a agentes patogênicos das DTCs comparados aos das áreas rurais.

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SUMMARYThe aims of this study were to determine the seroprevalence of Ehrlichia spp. and risk factors for exposure in a restricted population of dogs, horses, and humans highly exposed to tick bites in a Brazilian rural settlement using a commercial ELISA rapid test and two indirect immunofluorescent assays (IFA) with E. canis and E. chaffeensis crude antigens. Serum samples from 132 dogs, 16 horses and 100 humans were used. Fifty-six out of 132 (42.4%) dogs were seropositive for E. canis. Dogs > one year were more likely to be seropositive for E. canis than dogs ≤ one year (p = 0.0051). Ten/16 (62.5%) and 8/16 (50%) horses were seropositive by the commercial ELISA and IFA, respectively. Five out of 100 (5%) humans were seropositive for E. canis and E. chaffeensis. Rhipicephalus sanguineus (n = 291, 97.98%) on dogs and Amblyomma cajennense (n = 25, 96.15%) on horses were the most common ticks found. In conclusion, anti-Ehrlichia spp. antibodies were found in horses; however, the lack of a molecular characterization precludes any conclusion regarding the agent involved. Additionally, the higher seroprevalence of E. canis in dogs and the evidence of anti-Ehrlichia spp. antibodies in humans suggest that human cases of ehrlichiosis in Brazil might be caused by E. canis, or other closely related species.

BackgroundVisceral leishmaniasis (VL) has been increasingly recognized in cats living in areas endemic for the disease. Co-infection with Leishmania infantum and other infectious agents is well established in dogs. However, for cats, data on co-infections with L. infantum and other infectious agents are still sparse. The aim of this study was to identify the prevalence of vector-borne pathogens, Mycoplasma spp., feline immunodeficiency virus (FIV) and feline leukaemia virus (FeLV) in cats from an area endemic for VL in southeastern Brazil.ResultsOf the 90 cats, eight (8.9%) were infected with Mycoplasma spp., five (5.5%) were FIV- positive and one (1.1%) was FeLV-positive. Co-infection with L. infantum and at least one other infectious agent was found in 9/50 (18.0%; CI: 8.6–31.4%) cats. In Group 1 (cats infected naturally by L. infantum), 4/50 (8.0%) cats were positive for FIV, 4/50 (8%) for Mycoplasma spp. and 1/50 (2.0%) was co-infected with FeLV and Mycoplasma spp. In Group 2 (cats non-infected with L. infantum), 2/40 (5.0%) cats were infected with Mycoplasma spp. and 1/40 (2.5%) was co-infected with FIV and Mycoplasma spp. All cats were negative for Ehrlichia spp., Babesia spp. and Anaplasma platys.ConclusionA low prevalence of co-infection in Leishmania-infected and non-infected cats was found. Co-infections with Leishmania and vector-borne diseases in cats are not common in this area endemic for VL in Brazil.

Bovine cysticercosis is a disease that is endemic in several countries with an important zoonotic potential but with an increasing public health concern. The meat inspection at slaughterhouses is fundamental to establish the prevalence and prevention of zoonotic diseases, such as cysticercosis. However, in Brazil, there is no study investigating the dynamics of cysticercosis in slaughtered cattle from the entire country. Thus, the aim was to use Geographic Information System (GIS) as a tool to analyze the prevalence of bovine cysticercosis in slaughtered cattle, by using the data from slaughterhouses inspected by the Federal Inspection Service of the Ministry of Agriculture, Livestock and Supply (SIF/MAPA), during January/2007 to April/2010. Data from slaughtered cattle was used to generate a bovine cysticercosis database for all states and municipalities of Brazil, in order to analyze and create epidemiological maps using the GIS software. During the period analyzed, 75.983.590 cattle were slaughtered and the prevalence of bovine cysticercosis in Brazil was 1.05%, with the Southeast region presenting the majority of cases. The highest amount of bovine cysticercosis cases occurred in the state of São Paulo (400,834) followed by Mato Grosso do Sul (151,735), and Paraná (94,046), while there was no observation of occurrence in nine states. The data provided by slaughterhouses inspected by The SIF/ MAPA can be used as an informative source for animal and public health agencies for the prevention of the taeniasis/cysticercosis complex. This study elucidates the importance of meat inspection associated with epidemiological maps, targeting the disease control in livestock and the active surveillance for potential zoonotic human infection. Data from this study suggest bovine cysticercosis is endemic in several Brazilian states, and the risk of infection is directly related with the principal areas of commercial cattle rearing, irrespective of the demographics of the human population. ResumoCisticercose bovina é uma doença endêmica em vários países com um importante potencial zoonótico e uma crescente importância na saúde pública. A inspecção da carne nos matadouros é fundamental para estabelecer a prevalência e prevenção de doenças zoonóticas, tais como a cisticercose. No entanto, no Brasil, não há estudo que tenha investigado a dinâmica da cisticercose em bovinos abatidos em todo o país. Assim, o presente estudo teve como objetivo usar Sistema de Informação Geográfica (GIS) como uma ferramenta para analisar a prevalência de cisticercose bovina em bovinos, usando os dados de matadouros inspecionados pelo Serviço de Inspeção Federal do Ministério da Agricultura, Pecuária e Abastecimento (SIF/MAPA), no período de janeiro de 2007 a abril de 2010. As informações de bovinos abatidos foram usadas para gerar um banco de dados sobre cisticercose bovina para todos os estados e municípios do Brasil, a fim de analisar e criar mapas epidemiológicos usando o software GIS. Durante o período analisado, 75.983.590 bovinos for...

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Opossums of the genus Didelphis are considered synanthropic animals due to their close contact with human beings. Previously, two species of hemotropic mycoplasmas (hemoplasmas) have been detected in opossums: 'Candidatus Mycoplasma haemodidelphidis' in the North American opossum (Didelphis virginiana) and a potentially novel hemotropic Mycoplasma sp. in the white-eared opossums (Didelphis albiventris) from Brazil. Accordingly, the aims of this study were as follows: (a) to determine the prevalence of hemotropic Mycoplasma spp. in free-ranging opossums, (b) to characterize molecularly the hemotropic Mycoplasma sp. infecting opossums and (c) to determine factors associated with hemoplasma infection in opossums from Canoinhas municipality, Santa Catarina State, southern Brazil. For this purpose, 50 How to cite this article: Pontarolo GH, Kühl LF, Pedrassani D, et al. 'Candidatus Mycoplasma haemoalbiventris', a novel hemoplasma species in white-eared opossums (Didelphis albiventris) from Brazil.

Although anemia has been historically linked to Haemonchus contortus infection, other infectious agents, such as hemotropic mycoplasmas and tick-borne disease pathogens, may also lead to anemic crisis in sheep. This study has aimed to investigate infections related to anemia in a sheep herd from Bandeirantes City, Paraná State, southern Brazil. Seven out of forty-two (16.6%; 95% CI: 8.32–30.6%) sheep were positive for hemoplasmas by a PCR targeting the 16S rRNA gene and all tested negative for A. marginale/A. ovis and Babesia/Theileria spp. by PCR based on msp4 and 18S rRNA genes, respectively. Two (4.7%; 95% CI: 1.32–15.79%) animals were infested with Rhipicephalus microplus ticks. Fecal egg counting was performed in 38 sheep and 24 (63.15%; 95% CI: 47.2–76.6%) presented > 500 eggs per gram. Phylogenetic analysis of partial sequences of the detected hemotropic Mycoplasma sp. 16S and 23S rRNA genes confirmed that the animals were infected with Mycoplasma ovis. Polymorphism analysis of partial 16S rRNA sequences showed three different genotypes of M. ovis infecting sheep assessed in the present study. Mycoplasma ovis and gastrointestinal nematodes occurs in sheep from the northern region of Paraná State.