Prevalence of &lt;I&gt;Ehrlichia canis&lt;/I&gt; (Rickettsiales: Anaplasmataceae) in Dogs and &lt;I&gt;Rhipicephalus sanguineus&lt;/I&gt; (Acari: Ixodidae) Ticks from Brazil

Aguiar, Daniel Moura de; Cavalcante, Guacyara Tenório; Pintér, Adriano; Gennari, Solange Maria; Camargo, Luís Marcelo Aranha; Labruna, Marcelo Bahia

doi:10.1603/0022-2585(2007)44[126:poecra]2.0.co;2

Cited by 76 publications

(69 citation statements)

References 21 publications

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“…In the Monte Negro district of the State of Roraima, utilizing a randomly-selected sample of the urban area, Aguiar et al (2007b) obtained a prevalence rate of 37.9% (58/153) similar to the one observed in the present study. In another study, conducted by Carlos et al (2007) in two cities in the Southwestern region of the State of Bahia, Itabuna and Ilhéus, the infection rate was 36% (72/200), also similar to that of the present study; it should be noted, however, that the dogs in the study by Carlos et al were chosen from animals receiving clinical care.…”

Section: Discussionsupporting

confidence: 86%

“…There are scarce data available regarding E. canis infection in R. sanguineus (MURPHY et al, 1998;UNVER et al, 2001;NDIP et al, 2007). In the study performed by Aguiar et al (2007b) in Monte Negro (State of Rondônia) and São Paulo (State of São Paulo), E. canis-infection rates in R. sanguineus ticks varied from 2.4 (4/165) to 6.2% (10/162). Results similar to those obtained in the present study were observed in Africa, where the infection rate was 21% (19/92), with the tick specimens examined having been collected from 15 dogs (NDIP et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

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Prevalence of ehrlichial infection among dogs and ticks in Northeastern Brazil

Souza¹,

Leal²,

Barboza³

et al. 2010

Rev. Bras. Parasitol. Vet. (Online)

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This study investigated the epidemiology of canine ehrlichiosis in Northeastern Brazil, focusing the identification of the Ehrlichia species and vectors involved. Samples were collected from 472 domestic dogs residing in the health districts of Cajazeiras and Itapuã of Salvador city. The average prevalence of antibodies reactive to E. canis by immunofluorescent antibody test (IFAT) (titer ≥ 1:80) was 35.6% (168/472). Blood samples from the E. canis-seropositive animals were tested by nested PCR in order to identify the Ehrlichia species responsible for the infection. Among the seropositives, 58 (34.5%) were found to be PCR-positive for E. canis. Ticks were found in 32 dogs. Nested-PCR analysis showed that 21.9% (7/32) of the Rhipicephalus sanguineus were infected by E. canis. In both dogs and Rhipicephalus sanguineus, nested-PCR for E. ewingii and E. chaffeensis was negative, with no amplification of DNA fragment.Keywords: Ehrlichia, PCR, epidemiology. ResumoEste estudo objetivou pesquisar a epidemiologia da erliquiose canina no Nordeste do Brasil, com especial atenção na identificação da espécie de Ehrlichia envolvida nas infecções caninas e vetoriais detectadas. Para isso foram coletadas amostras de 472 cães domiciliados nos distritos sanitários de Cajazeiras e Itapuã. A prevalência de anticorpos anti-E. canis, pela imunofluorescência indireta (título ≥ 1:80), em cães foi de 35,6% (168/472). Os animais soropositivos foram analisados por uma nested-PCR para identificação da espécie de Ehrlichia responsável pela infecção. Dentre os positivos, 58 (34,5%) cães foram PCR-positivos para E. canis. Foram coletados e classificados os carrapatos em 32 cães. A nested-PCR de Rhipicephalus sanguineus resultou em 21,9% (7/32) de infecção por E. canis. A nested-PCR de amostras de sangue de cães e Rhipicephalus sanguineus para E. chaffeensis e E. ewingii foi negativa, não havendo amplificação de fragmento de DNA.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Prevalence of ehrlichial infection among dogs and ticks in Northeastern Brazil

Souza¹,

Leal²,

Barboza³

et al. 2010

Rev. Bras. Parasitol. Vet. (Online)

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“…Molecular methods demonstrated similar results for the effects of sex and age relative to infection by E. canis in Cuiaba, State of Mato Grosso (SILVA et al, 2010), and Ilheus and Itabuna, State of Bahia (CARVALHO et al, 2008). This pattern was also observed with serological assessments performed in several Brazilian cities: Cuiaba, State of Mato Grosso (SILVA et al, 2010), Monte Negro, State of Rondonia (AGUIAR et al, 2007), Patos, State of Paraiba (AZEVEDO et al, 2011), and southern cities in the State of Rio Grande do Sul (SAITO et al, 2008). Serological surveys made in the USA (RODGERS et al, 1989), Israel (HARRUS et al, 1997, and Japan (INOKUMA et al, 1999) revealed similar findings.…”

Section: Resultssupporting

confidence: 69%

Occurrence of Ehrlichia canis and Anaplasma platys in household dogs from northern Parana

Silva

Benitez

Girotto

et al. 2012

Rev. Bras. Parasitol. Vet.

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Canine monocytic ehrlichiosis caused primarily by Ehrlichia canis and canine thrombocytic anaplasmosis induced by Anaplasma platys are important emerging zoonotic tick-borne diseases of dogs. There is evidence that these pathogens can also affect humans. This study evaluated the presence of E. canis and A. platys in blood samples collected from 256 domiciled dogs in the municipality of Jataizinho, located in north region of the State of Parana, Brazil, by PCR assay. The occurrence of E. canis and A. platys was 16.4% (42/256) and 19.4% (49/256), respectively; while 5.47% (14/256) of the dogs evaluated were co-infected by these two organisms. The presence of E. canis and A. platys was not significantly associated with the variables evaluated (sex, age, outdoor access, and presence of ticks during blood collection). Infection of dogs by E. canis was associated with anemia and thrombocytopenia, while infection induced by A. platys was related only to thrombocytopenia. Canine monocytic ehrlichiosis and canine thrombocytic anaplasmosis should be included in the differential diagnoses when these hematological alterations are observed during routine laboratory evaluation of dogs.Keywords: Canine monocytic ehrlichiosis, canine thrombocytic anaplasmosis, PCR, anemia, thrombocytopenia. ResumoErliquiose monocítica canina, causada principalmente por Ehrlichia canis, e anaplasmose trombocítica canina, devida a infecção com Anaplasma platys, são importantes doenças transmitidas por carrapatos que acometem os cães, com evidências que podem também acometer o homem. O presente estudo avaliou a ocorrência desses agentes em amostras de sangue de 256 cães domiciliados na cidade de Jataizinho, na região Norte do Paraná, Brasil, utilizando a técnica da Reação em Cadeia da Polimerase (PCR). A ocorrência de E. canis e A. platys foi de 16,4% (42/256) e 19,4% (49/256), respectivamente, com 5,47% (14/256) dos animais apresentando coinfecção. Não foi observada associação significativa com as variáveis sexo, idade, acesso à rua e presença de carrapatos no momento da coleta de sangue. A infecção por E. canis teve relação com anemia e com trombocitopenia, enquanto a infecção por A. platys apresentou relação apenas com trombocitopenia. Com base nos resultados obtidos, reforçou-se a necessidade de que erliquiose e anaplasmose canina devem estar entre os diagnósticos diferenciais, quando da detecção de anemia e trombocitopenia em exames laboratoriais.

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“…Anti-Ehrlichia spp. antibodies were evaluated using the São Paulo strain of E. canis with a cut-off point at an initial dilution of 1:40 (AGUIAR et al, 2007). Anti-Rickettsia spp.…”

Section: Methodsmentioning

confidence: 99%

Serological evidence of exposure to tick-borne agents in opossums (Didelphis spp.) in the state of São Paulo, Brazil

Melo

Aguiar

Spolidorio

et al. 2016

Rev. Bras. Parasitol. Vet.

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Evidência sorológica de exposição a agentes transmitidos por carrapatos em gambás (Didelphis spp.) AbstractThis work involved a serological investigation of tick-borne pathogens in opossums in eight municipalities of the state of São Paulo, Brazil. Serum samples from 109 opossums (91 Didelphis aurita and 18 Didelphis albiventris) were tested to detect antibodies to Rickettsia rickettsii (Taiaçu strain, 1:64 cut-off) and Ehrlichia canis (São Paulo strain, 1:40 cut-off), by indirect immunofluorescence assay (IFA); and against Borrelia burgdorferi (strain G39/40) by enzyme-linked immunosorbent assay (ELISA). The presence of antibodies to anti-R. rickettsii, anti-E. canis and anti-B. burgdorferi was detected in 32 (29.35%), 16 (14.67%) and 30 (27.52%) opossums, respectively. Opossum endpoint titers ranged from 64 to 1,024 for R. rickettsii, from 40 to 160 for E. canis, and from 400 to >51,200 for B. burgdorferi. These serological results suggest that opossums have been exposed to Rickettsia spp., Ehrlichia spp., and B. burgdorferi-related agents in the state of São Paulo. Our study underscores the need for further research about these agents in this study area, in view of the occurrence of Spotted Fever and Baggio-Yoshinari Syndrome disease in humans in the state of São Paulo, Brazil.

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Prevalence of <I>Ehrlichia canis</I> (Rickettsiales: Anaplasmataceae) in Dogs and <I>Rhipicephalus sanguineus</I> (Acari: Ixodidae) Ticks from Brazil

Cited by 76 publications

References 21 publications

Prevalence of ehrlichial infection among dogs and ticks in Northeastern Brazil

Prevalence of ehrlichial infection among dogs and ticks in Northeastern Brazil

Occurrence of Ehrlichia canis and Anaplasma platys in household dogs from northern Parana

Serological evidence of exposure to tick-borne agents in opossums (Didelphis spp.) in the state of São Paulo, Brazil

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