Babesiosis of Companion Animals and Man

Taboada, Joseph; Merchant, Sandra R.

doi:10.1016/s0195-5616(91)50011-5

Cited by 80 publications

(52 citation statements)

References 19 publications

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“…Such close interaction generates a greater zeal for ectoparasite control, and therefore lower parasitism of the dogs by the tick vector (5) . 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) .…”

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%

“…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%

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

et al. 2017

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“…Thrombocytopenia in dogs infected with B. gibsoni has been reported previously [24][25][26], but the mechanisms were not elucidated. The presence of a platelet-surface associated IgG in experimental B. gibsoni infected dogs at the acute and chronic stages was demonstrated by Wilkerson et al [25].…”

Section: Discussionmentioning

confidence: 98%

“…All of the infected dogs, except for one female, had a history of dog fighting. The Babesia parasite is generally known to be transmitted by ticks such as Haemaphysalis and Rhipicephalus [14,24]. Haemaphysalis species has an especially wide geographical distribution, including Aomori Prefecture [23]; therefore, the vector ticks might have contributed to the spread of B. gibsoni infection among Tosa dogs, but dogs with acute B. gibsoni infection were not recognized in dogs of any other breed.…”

Section: Discussionmentioning

confidence: 99%

Incidence of Canine Babesia gibsoni Infection and Subclinical Infection among Tosa dogs in Aomori Prefecture, Japan

Matsuu

Kawabe

Koshida

et al. 2004

The Journal of Veterinary Medical Science

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ABSTRACT. To identify the incidence of Babesia gibsoni (B. gibsoni) in Aomori Prefecture, northeastern Japan, dogs with acute B. gibsoni infection were investigated at the Animal Teaching Hospital, Kitasato University, between April 2002 and March 2003. Eighteen dogs with acute B. gibsoni infection were recognized; they were all male dogs of the fighting dog breed Tosa. Their platelet counts were below normal and their packed cell volumes (PCVs) were at various levels. We collected blood samples from 141 Tosa dogs from Aomori Prefecture and used polymerase chain reaction assay to investigate the incidence of subclinical B. gibsoni infection. We also looked into the serological abnormalities associated with thrombocytopenia or anemia in subclinical infection. Forty-one of 87 dogs (47.1%) with histories of dog fighting, and one dog of 54 without a history of dog fighting were positive for B. gibsoni; that is, 42 of 141 dogs (29.8%) showed a positive result. The mean platelet counts of dogs with subclinical infection were significantly lower and levels of anti-platelet IgG were significantly higher than levels for dogs without infection. Anti-erythrocyte membrane IgG levels were significantly higher in dogs with subclinical infections, although mean PCVs were not significantly different. Tosa dogs from Aomori Prefecture, Japan, were highly infected with B. gibsoni subclinically and this pathogen might be successfully transmitted during dog fighting. Dogs with subclinical infections were at risk of chronic thrombocytopenia, which may be due to autoimmune mechanisms. KEY WORDS: anti-erythrocyte membrane IgG, anti-platelet IgG, Babesia gibsoni, Tosa dog.

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“…These clinical signs are however, not exclusive to small babesiae but occur also with a large babesia of dogs i.e. Babesia canis (Taboada and Merchant 1991).…”

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confidence: 99%

Evidence of new pathogenic Theileria species in dogs

Dixit

Dixit²,

Varshney³

2010

J Parasit Dis

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Babesiosis, caused by tick-borne haematozoan organisms of the genus Babesia, is a parasitic disease of domestic and wild mammals. Canine Babesidae have historically been classified as ''large Babesia'' (Babesia canis) and ''small Babesia'' (Babesia gibsoni) based on the size of their intraerythrocytic forms. Recent publications, however, suggest that the diversity of piroplasm species infecting dogs might be greater than previously appreciated. Sequencing and phylogenetic analysis of the ssrRNA gene has revealed that canine piroplasms are found in three clades, 'true' Babesia sp. (B. canis and B. gibsoni), Theileria annae and Theileria-like group (B. conradae). This newly recognised piroplasm T. annae appears to be hyperendemic in northwest Spain. The vector for this emergent canine infection remains undescribed, although the Ixodes hexagonus is suspected based on their presence upon the dogs in NW Spain and the relative absence of others. These observations have introduced a major change in the approach to the epidemiology of babesiosis in dogs. More clinical samples and data will need to be collected and analyzed to understand the importance of Theileria species in dogs.

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Babesiosis of Companion Animals and Man

Cited by 80 publications

References 19 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

Incidence of Canine Babesia gibsoni Infection and Subclinical Infection among Tosa dogs in Aomori Prefecture, Japan

Evidence of new pathogenic Theileria species in dogs

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