Report on ticks collected in the Southeast and Mid-West regions of Brazil: analyzing the potential transmission of tick-borne pathogens to man

Figueiredo, Luíz Tadeu Moraes; Badra, Soraya Jabur; Pereira, Luiz Eloy; Szabó, Matias Pablo Juán

doi:10.1590/s0037-86821999000600002

Cited by 45 publications

(27 citation statements)

References 9 publications

(1 reference statement)

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“…B. v. berkhoffii has been detected by PCR in dogs, coyotes and foxes [29,36]; however, the extent to which dogs contribute to the transmission of Bartonella to humans is unknown [24]. In Brazil, Rhipicephalus sanguineus, the most prevalent tick that infests dogs [18] also parasitizes humans [17,21]. Epidemiological evidences suggest that R. sanguineus may be involved in the transmission of Bartonella species in dogs [39].…”

Section: Discussionmentioning

confidence: 99%

Canine bartonellosis: serological and molecular prevalence in Brazil and evidence of co-infection withBartonella henselaeandBartonella vinsoniisubsp.berkhoffii

et al. 2007

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-The purpose of this study was to determine the serological and molecular prevalence of Bartonella spp. infection in a sick dog population from Brazil. At the São Paulo State University Veterinary Teaching Hospital in Botucatu, 198 consecutive dogs with clinicopathological abnormalities consistent with tick-borne infections were sampled. Antibodies to Bartonella henselae and Bartonella vinsonii subsp. berkhoffii were detected in 2.0% (4/197) and 1.5% (3/197) of the dogs, respectively. Using 16S-23S rRNA intergenic transcribed spacer (ITS) primers, Bartonella DNA was amplified from only 1/198 blood samples. Bartonella seroreactive and/or PCR positive blood samples (n = 8) were inoculated into a liquid pre-enrichment growth medium (BAPGM) and subsequently sub-inoculated onto BAPGM/blood-agar plates. PCR targeting the ITS region, pap31 and rpoB genes amplified B. henselae from the blood and/or isolates of the PCR positive dog (ITS: DQ346666; pap31 gene: DQ351240; rpoB: EF196806). B. henselae and B. vinsonii subsp. berkhoffii (pap31: DQ906160; rpoB: EF196805) co-infection was found in one of the B. vinsonii subsp. berkhoffii seroreactive dogs. We conclude that dogs in this study population were infrequently exposed to or infected with a Bartonella species. The B. henselae and B. vinsonii subsp. berkhoffii strains identified in this study are genetically similar to strains isolated from septicemic cats, dogs, coyotes and human beings from other parts of the world. To our knowledge, these isolates provide the first Brazilian DNA sequences from these Bartonella species and the first evidence of Bartonella co-infection in dogs.dogs / Bartonella infections / heart disease / culture / Brazil

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Section: Discussionmentioning

confidence: 99%

Canine bartonellosis: serological and molecular prevalence in Brazil and evidence of co-infection withBartonella henselaeandBartonella vinsoniisubsp.berkhoffii

et al. 2007

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“…Isso levanta a possibilidade de um carrapato estar envolvido na transmissão de T. evansi de capivaras para os eqüinos. O carrapato-estrela (Amblyomma cajennense) parasita capivaras e eqüinos (Figueiredo et al 1999) e, embora não existam relatos de que esse carrapato possa atuar como vetor de T. evansi, é possível imaginar que, considerando a informação de que as capivaras morreram em grande número na Propriedade A, os carrapatos-estrela teriam apenas os eqüinos como hospedeiros alternativos. Nesse cenário, a transmissão capivara-eqüino não seria improvável.…”

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Surtos de tripanossomíase por Trypanosoma evansi em eqüinos no Rio Grande do Sul: aspectos epidemiológicos, clínicos, hematológicos e patológicos

et al. 2005

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Additionally, around 80 mares were sent to Farm A to be bred. Of those, 66 became ill and 56 died after being returned to their farms of origin. Twenty one horses clinically affected by the disease were observed. Clinical signs included loss of weight (despite voracious appetite), lethargy, incoordination and instability of hindlimbs, atrophy of the large muscles of the hindlimbs, muscle weakness and paleness of mucosae. Specimens of T. evansi were detected in the blood drawn from four affected horses. Normocytic normochromic anemia with PCVs ranging from 15 to 31%, leucocytosis due to lymphocytosis associated to large atypical lymphocytes was observed in several affected horses. High levels of antibodies against T. evansi were detected in the serum of six horses from Farm A. Eight horses presented encephalic neurological signs such as circling, ataxia, blindness, excitation, falls, listlessness, proprioception deficits and head tilt. One horse assumed a "dogseating position". Necropsy findings included muscle atrophy, enlargement and lymphoid hyperplasia of the spleen and lymphnodes, edema and softening of the white and grey matter of the brain. Histologically, an overwhelming necrotizing panencephalitis was observed in the seven horses with encephalic signs. This panencephalitis was characterized by marked edema, demyelination and necrosis and perivascular infiltrates of 6-10 layers of lymphocytes and plasm cells affecting both the white and gray matter. Several plasm cells in the inflammatory infiltrate contained numerous eosinophilic globules in their cytoplasm (Mott cells). Similar histological lesions were observed in the spinal cord of the horse with the "dog-seating position". The brains of five horses with the encephalic signs were submitted to immunohistochemistry stain by the streptavidinbiotin technique. In all of those five brains moderate to abundant specimens of T. evansi in the perivascular spaces and neuropile were marked by the specific antibody. Epidemiological, clinical, hematological, and pathological aspects of equine trypanosomiasis caused by T. evansi are discussed.

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“…Vários trabalhos descrevem capivaras como importantes reservatórios para T. evansi (HOARE, 1972;MORALES et al, 1976;NUNES et al, 1993;FRANKE et al, 1994;MUÑOZ & CHAVEZ, 2001 Stomoxys e tabanídeos que foram encontrados junto aos eqüinos, sendo esta, uma das formas de transmissão do protozoário entre os animais (RODRIGUES et al, 2005). O carrapato-estrela (Amblyomma cajennense), que parasita capivaras e eqüinos, também atua como vetor da doença (FIGUEIREDO et al, 1999), mas não se constatou a presença deste nos eqüinos. Conforme relatado, um dos cães da propriedade apresentou os sinais clínicos típicos da doença (incoordenação motora, edema de membro posterior, anorexia, perda de peso), morrendo posteriormente.…”

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Ocorrência de Trypanosoma evansi em eqüinos no município de Cruz Alta, RS, Brasil

et al. 2008

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Report on ticks collected in the Southeast and Mid-West regions of Brazil: analyzing the potential transmission of tick-borne pathogens to man

Cited by 45 publications

References 9 publications

Canine bartonellosis: serological and molecular prevalence in Brazil and evidence of co-infection withBartonella henselaeandBartonella vinsoniisubsp.berkhoffii

Canine bartonellosis: serological and molecular prevalence in Brazil and evidence of co-infection withBartonella henselaeandBartonella vinsoniisubsp.berkhoffii

Surtos de tripanossomíase por Trypanosoma evansi em eqüinos no Rio Grande do Sul: aspectos epidemiológicos, clínicos, hematológicos e patológicos

Ocorrência de Trypanosoma evansi em eqüinos no município de Cruz Alta, RS, Brasil

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