Host surveys, ixodid tick biology and transmission scenarios as related to the tick-borne pathogen, Ehrlichia canis

Stich, Roger W.; Schaefer, John J.; Bremer, William G.; Needham, Glen R.; Jittapalapong, Sathaporn

doi:10.1016/j.vetpar.2008.09.013

Cited by 74 publications

(66 citation statements)

References 158 publications

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“…At the same time, the presence of infected dogs is not required for B. vogeli to remain in the tick population (28) , a potential explanation for the higher prevalence of babesiosis. The presence of infected dogs is necessary for the E. canis to remain in a tick population because there is no vertical transmission in ticks (29) . B. vogeli, however, can be transmitted transovarially and be passed to the next tick generation even in the absence of infected dogs (28) .…”

Section: Resultsmentioning

confidence: 99%

“…Canine monocytic ehrlichiosis (CME) is a major infectious disease that affects dogs and is also of interest in public health due to the recent discoveries of infection by E. canis in humans in Venezuela, where the agent was likely transmitted by the tick vector R. sanguineus (48,49) . Thus, taking into consideration the concern about the zoonotic potential of E. canis and other hemoparasites, further studies on the parasitism of humans by the R. sanguineus are necessary.…”

Section: Resultsmentioning

confidence: 99%

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HEMATOLOGICAL PARAMETERS AND SEROPREVALENCE OF Ehrlichia canis AND Babesia vogeli IN DOGS

et al. 2017

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The aim of this study was to determine the prevalence of anti-Ehrlichia canis and anti-Babesia vogeli IgG antibodies in dogs and correlate this prevalence with risk factors to evaluate the relation of serological status to hematological findings. Blood samples of dogs attended from September 2011 to March 2012 at the veterinary hospital of the Federal University of Lavras, Brazil, were analyzed using an indirect fluorescence antibody test (IFAT). Of the total 160 dog serum samples, 23.7% (38 dogs; CI 95 17.7% -30.7%) were seropositive for E. canis, 40.0% (64 dogs; CI 95 40.0% -59.2%) for B. vogeli, and 5.6% (9 dogs) for both hemoparasites. None of the epidemiological variables showed a significant association (P>0.05) with seropositivity to E. canis and B. vogeli. Dogs seropositive for E. canis showed lower values for hematocrit (P<0.05). However, for the erythrogram, the platelet count, the leukogram and clinical signs, no significant difference (P>0.05) was observed between dogs that were seropositive and seronegative for E. canis or for B. vogeli. Serological results suggest that infection with E. canis and B. vogeli is endemic in the canine population in question, with a prevalence of the subclinical phase (asymptomatic) in dogs that are seropositive for ehrlichiosis or babesiosis. Keywords: babesiosis; canine; ehrlichiosis; IFAT; laboratory findings. ResumoO objetivo deste estudo foi determinar a prevalência de anticorpos IgG anti-Ehrlichia canis e antiBabesia vogeli em cães e correlacionar com a prevalência e fatores de risco para avaliar a relação do estado sorológico com os achados hematológicos. Amostras de sangue de cães coletadas de setembro de 2011 a março de 2012, no Hospital Veterinário da Universidade Federal de Lavras, Brasil, foram analisadas usando o teste de reação de imunofluorescência indireta (RIFI). Do total de amostras de soro de 160 cães, 23,7% (38 cães; IC95 17,7% -30,7%) foram soropositivos para E. canis, 40,0% (64 cães; IC95 40,0% -59,2%) para B. vogeli, e 5,6% (9 cães) para os dois hemoparasitas. Nenhuma das variáveis epidemiológicas mostrou associação significativa (P> 0,05) com a soropositividade para E. canis e B. vogeli. Cães soropositivos para E. canis mostraram valores médios mais baixos para hematócrito (P<0,05). No entanto, para o eritrograma, a contagem de plaquetas, o leucograma e os sinais clínicos, nenhuma diferença significativa (P> 0,05) foi observada entre cães soropositivos e soronegativos para E. canis ou para B. vogeli. Os resultados sorológicos deste estudo sugerem que a Cienc. anim. bras., Goiânia, v.18, 1-9, e-36095, 2017 2 FONSECA, J.P., et al.infecção por E. canis e B. vogeli é endêmica na população canina em questão, com uma prevalência da fase subclínica (assintomática) em cães soropositivos para erliquiose ou babesiose.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

HEMATOLOGICAL PARAMETERS AND SEROPREVALENCE OF Ehrlichia canis AND Babesia vogeli IN DOGS

et al. 2017

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“…A erliquiose tem sido motivo de grande interesse tanto para pesquisas em medicina veterinária quanto para saúde pública, em decorrência das recentes descobertas de infecção em humanos (STICH et al, 2008); portanto, este trabalho teve o propósito de verificar a soroprevalência da infecção por Ehrlichia canis em cães domiciliados na cidade de Cuiabá, Estado de Mato Grosso, por meio da imunofluorescência indireta. …”

Section: Introductionunclassified

Soroprevalência de anticorpos anti-Ehrlichia canis em cães de Cuiabá, Mato Grosso

Silva¹,

Almeida²,

Sorte³

et al. 2010

Rev. Bras. Parasitol. Vet. (Online)

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A erliquiose canina é uma doença transmitida por carrapatos Rhipicephalus sanguineus e ocasionada pela Ehrlichia canis, bactéria intracelular obrigatória. O presente estudo verificou a prevalência de anticorpos anti-E. canis em 254 cães de quatro regiões administrativas de Cuiabá, Estado de Mato Grosso, por imunofluorescência indireta, observando-se uma prevalência de 42,5% (108/254) sem diferença significativa entre as regiões. As variáveis idade, raça, sexo, hábitat, acesso à zona rural e presença de carrapatos foram analisadas. Os títulos de anticorpos variaram entre 1:40 a 1:2.560. Somente 32 (29,63%) cães soropositivos estavam infestados por carrapatos, todos R. sanguineus. O resultado encontrado confirma que não há predisposição racial, sexual ou etária, enquanto a menor ocorrência de cães reagentes no intradomicílio provavelmente está relacionada à baixa infestação por carrapato, apesar de não ter sido observada diferença significativa entre os cães com ou sem a infestação com o carrapato vetor.Palavras-chave: Ehrlichia canis, imunofluorescência indireta, Cuiabá, inquérito epidemiológico. AbstractCanine ehrlichiosis is a disease transmitted by ticks Rhipicephalus sanguineus and caused by Ehrlichia canis, obligatory intracellular bacteria. The present study examined the prevalence of anti-E. canis in 254 dogs from four administrative regions of Cuiabá, Mato Grosso, by indirect immunofluorescence assay. There was a prevalence of 42.5% (108/254) without significant difference between the studied regions. The variables age, breed, sex, habitat, access to rural and ticks were analyzed. The antibody titers ranged from 1:40 to 1:2,560. Only 32 (29.63%) seropositive dogs were infested with ticks, all R. sanguineus. The results confirm that do not have breed, sex or age predisposition to ehrlichiosis due E. canis, while the lowest occurrence of reactive dogs indoors probably related to low tick infestation, although no significant difference between dogs with or without infestation with the tick vector.

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“…Canine monocytic ehrlichiosis (CME) is a cosmopolitan disease of dogs that is caused by the tick-borne rickettsia, Ehrlichia canis (20). Ehrlichia spp., like the closely related genus Anaplasma, are biologically transmitted among vertebrates by ticks of the family Ixodidae (8), and Rhipicephalus sanguineus, the "brown dog tick," is considered the primary vector of E. canis.…”

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Tick Acquisition of Ehrlichia canis from Dogs Treated with Doxycycline Hyclate

Schaefer¹,

Needham

Bremer³

et al. 2007

Antimicrob Agents Chemother

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Host surveys, ixodid tick biology and transmission scenarios as related to the tick-borne pathogen, Ehrlichia canis

Cited by 74 publications

References 158 publications

HEMATOLOGICAL PARAMETERS AND SEROPREVALENCE OF Ehrlichia canis AND Babesia vogeli IN DOGS

HEMATOLOGICAL PARAMETERS AND SEROPREVALENCE OF Ehrlichia canis AND Babesia vogeli IN DOGS

Soroprevalência de anticorpos anti-Ehrlichia canis em cães de Cuiabá, Mato Grosso

Tick Acquisition of Ehrlichia canis from Dogs Treated with Doxycycline Hyclate

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