Pesquisa de anticorpos anti-Rickettsia rickettsii em eqüinos do Centro de Controle de Zoonoses do município de São Paulo (CCZ/SP)

Moraes‐Filho, Jonas; Horta, Maurício Cláudio; Pacheco, Richard de Campos; Maeda, M; Galano, Arquimedes; Oliveira, Maria Lúcia de; Yai, Lúcia Eiko Oishi; Labruna, Marcelo Bahia

doi:10.11606/issn.1678-4456.bjvras.2009.26753

Cited by 9 publications

(6 citation statements)

References 20 publications

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“…Previous studies have examined the seropositivity in horses in BSF non endemic areas. Among these studies, Moraes–Filho et al (2009) [ 18 ] found a low incidence of reactive animals (17.6%), but the provenance of these animals was unknown, and most of them were stray animals, different from the present study in which horses were autochthonous. In Caratinga in the state of Minas Gerais, Cardoso et al (2006) [ 19 ] found reactive serology in 3 of 18 (17%) horses’ samples and detected DNA of pathogenic Rickettsia in arthropod vectors in a region with no reported cases of BSF in the last 12 years.…”

Section: Discussioncontrasting

confidence: 74%

High Seroprevalence for Rickettsia rickettsii in Equines Suggests Risk of Human Infection in Silent Areas for the Brazilian Spotted Fever

Souza¹,

Camargo

Pintér³

et al. 2016

PLoS ONE

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Equines play a role in the epidemiology of Brazilian spotted fever (BSF) since they are a primary host for the tick Amblyomma sculptum. We studied the seroprevalence for three species of Rickettsia in equines in four endemic (with human cases) and in four non-endemic areas (no human cases) in the Piracicaba River Basin, São Paulo, Brazil. A serological survey of 504 equines was performed: around 63 animals were sampled in each area and tested through indirect immunofluorescence assay for R. rickettsii, R. parkeri, and R. bellii in 2012–2013. Blood samples were seropositive for 183 equines (36.3%) in which 73 (39.9%) were from non-endemic areas. In the studied sites equines were highly exposed to Rickettsia infection ranging from 6.1% to 54.7%, with Geometric Mean Titers greater in endemic area (p = 0.012). Results suggest that Rickettsia may be more widespread than the surveillance of BSF has detected. These results highlight the need to include data on the seroprevalence of sentinel animals to improve human diagnoses and surveillance in areas with no reported human cases.

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Section: Discussioncontrasting

confidence: 74%

High Seroprevalence for Rickettsia rickettsii in Equines Suggests Risk of Human Infection in Silent Areas for the Brazilian Spotted Fever

Souza¹,

Camargo

Pintér³

et al. 2016

PLoS ONE

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“…As diversas espécies de riquétsias têm, em sua maioria, os carrapatos como principal vetor, com exceção da R. felis e R. typhi, veiculadas por pulgas, e da R. prowazekii e Rickettsia akari, transmitidas por piolhos e ácaros, respectivamente (RAOULT; ROUX, 1997; O uso de técnicas sorológicas, principalmente a Reação de Imunofluorescência Indireta (RIFI), na detecção de anticorpos anti-Rickettsia spp. em animais (equinos e/ou cães) já foi descrito em estudos epidemiológicos nos estados de Rondônia (LABRUNA et al, 2007b), Mato Grosso (MELO et al, 2011), São Paulo (HORTA et al, 2007PINTER et al, 2008;MORAES-FILHO et al, 2009), Minas Gerais (VIANNA et al, 2008SILVA et al, 2010;PACHECO et al, 2011), Espírito Santo (SPOLIDORIO et al, 2010b, Paraná (TAMEKUNI et al, 2011;TOLEDO et al, 2011), Santa Catarina (MEDEIROS et al, 2013 e Rio Grande do Sul (SAITO et al, 2008;SANGIONI et al, 2011).…”

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Detecção de anticorpos anti-Rickettsia spp. em cães e equinos no estado de Mato Grosso, Brasil

et al. 2013

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ResumoEste estudo avaliou a infecção causada por Rickettsia spp. em cães e equinos no Estado de Mato Grosso . Um total de 384 cães e 460 equinos foi testado pela reação de imunofluorescência indireta (RIFI) para Rickettsia rickettsii, Rickettsia parkeri, Rickettsia amblyommii, Rickettsia rhipicephali e Rickettsia bellii. No total, 3,12 % (12/384) dos cães foram soros reagentes para pelo menos uma espécie de Rickettsia. Um total de sete (1,82 %) soros caninos apresentaram títulos para R. bellii, pelo menos 4 vezes maior do para qualquer um dos outros antígenos de riquétsia, permitindo considerar que estes cães foram infectados por R. bellii. Nos equinos, 273 (59,34 %) foram positivos para pelo menos um antígeno testado, e os maiores títulos finais anti-Rickettsia spp. foram observados para R. amblyommii, sugerindo reações homólogas a este agente ou um organismo intimamente relacionado. Os resultados mostraram que os cães estão sob baixa exposição a carrapatos infectados com riquétsias do grupo da febre maculosa, indicando baixo risco de infecção humana por esses agentes. No entanto, R. amblyommii está amplamente distribuída no Estado. Palavras-chave: Equinos e cães, reação de imunofluorescência indireta, soroprevalência, Rickettsia spp., Mato Grosso AbstractThis study evaluated the infection caused by Rickettsia spp. among dogs and horses from Mato Grosso State. A total of 384 dogs and 460 horses were tested by the Indirect Immunofluorescence Assay (IFA) for Rickettsia rickettsii, Rickettsia parkeri, Rickettsia amblyommii, Rickettsia rhipicephali and Rickettsia bellii Overall, 3.12% (12/384) of the dogs were seroreactive for at least one Rickettsia

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“…Brazilian spotted fever (BSF) is a common tick-borne disease caused by the bacterium Rickettsia rickettsii and is considered the most important rickettsial disease in Brazil due to > 50% fatality rates (Luz et al, 2019). This disease is endemic in areas of the Atlantic Forest biome in southeastern and southern Brazil (Moraes-Filho et al, 2009). The Brazilian territory has adopted a compulsory notification for BSF since 2001 (Ordinance N°.…”

mentioning

confidence: 99%

“…The vectors of BSF are ticks of the species Amblyomma aureolatum, identified only in the São Paulo metropolitan region, and Amblyomma sculptum, which is responsible for transmitting the highest number of cases. A. sculptum is the most common human-biting tick in Brazil and the main vector of R. rickettsii, and is distributed mainly in the Cerrado and Pantanal biomes and in degraded areas of the Atlantic Forest biome (Moraes-Filho et al, 2009). In contrast, there are limited records of the presence of A. sculptum in the Caatinga biome, for example, in the north-central region of Bahia state, which represents a narrow invagination of the tropical climate (Martins et al, 2016).…”

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confidence: 99%

Serological evidence of Rickettsia in horses from a semi-arid Brazilian region

Farias

Souza

Serpa

et al. 2021

Rev. Bras. Parasitol. Vet.

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Brazilian spotted fever (BSF) is a common tick-borne disease caused by Rickettsia rickettsii. Horses are the primary hosts of the main vector, Amblyomma sculptum, and are considered efficient sentinels for circulation of Rickettsia. Therefore, the aim of this study was to detect antibodies reactive to R. rickettsii antigens in horses from a non-endemic area in the north-central region of Bahia state, Brazil. Blood samples and ticks were collected from 70 horses from the municipalities of Senhor do Bonfim, Antônio Gonçalves, Pindobaçu, and Campo Formoso. The sera obtained were tested by an indirect immunofluorescence assay to detect anti-Rickettsia antibodies. Overall, 5.7% (4/70) of the horses reacted to R. rickettsii antigens. Ticks were collected from 18.6% (13/70) of the horses and were identified as A. sculptum and Dermacentor nitens. Despite being a non-endemic area, seropositive animals were identified in our study, suggesting circulation of rickettsial agents in the region. This is the first serological survey of this agent in horses from the north-central region of Bahia, and further studies are needed to understand the epidemiology of BSF in these locations.

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Pesquisa de anticorpos anti-Rickettsia rickettsii em eqüinos do Centro de Controle de Zoonoses do município de São Paulo (CCZ/SP)

Cited by 9 publications

References 20 publications

High Seroprevalence for Rickettsia rickettsii in Equines Suggests Risk of Human Infection in Silent Areas for the Brazilian Spotted Fever

High Seroprevalence for Rickettsia rickettsii in Equines Suggests Risk of Human Infection in Silent Areas for the Brazilian Spotted Fever

Detecção de anticorpos anti-Rickettsia spp. em cães e equinos no estado de Mato Grosso, Brasil

Serological evidence of Rickettsia in horses from a semi-arid Brazilian region

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