Dinâmica sazonal de carrapatos (Acari: Ixodidae) na mata ciliar de uma área endêmica para febre maculosa na região de Campinas, São Paulo, Brasil

Souza, Savina Silvana Aparecida Lacerra de; Souza, Celso Eduardo de; Neto, Elias José Rodrigues; Prado, Angelo Pires do

doi:10.1590/s0103-84782006000300024

Cited by 37 publications

(30 citation statements)

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“…In the present study, the presence and abundance of A. sculptum were strongly associated with areas of medium and dense vegetation cover, such as dirty pastures, barns and riparian forests. In the region of Campinas, the presence of riparian forest is likely the cause for increased A. sculptum vector frequency and transmission of BSF, as this ecosystem hosts large populations of capybaras (26) .…”

Section: Discussionmentioning

confidence: 99%

Risk factors associated with the transmissionof Brazilian spotted fever in the Piracicaba river basin, State of São Paulo, Brazil

Souza

Pintér

Donalísio

2015

Rev. Soc. Bras. Med. Trop.

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Introduction: Brazilian spotted fever (BSF) is a disease transmitted by ticks for which the etiological agent is Rickettsia rickettsii. The present essay evaluates the risk factors associated with the transmission of cases of BSF in the time period between 2003 and 2013 in the Piracicaba river basin, state of São Paulo. Methods: This essay presents a retrospective study to identify the factors associated with the transmission of cases of BSF among all suspected cases identifi ed by the System for Epidemiological Surveillance of São Paulo (CVE). After the description of temporal distribution (onset of symptoms) and the environmental and demographic variations of the confi rmed and discarded cases, a multiple logistic regression model was applied. Results: We searched 569 probable locations of infection (PLI) with 210 (37%) confi rmed cases of BSF and 359 (63%) discarded cases. The associated variables for the confi rmation of BSF in the multiple logistic model using a confi dence interval (CI) of 95% were age (OR = 1.025 CI: 1.015-1.035), the presence of Amblyomma sculptum in the environment (OR = 1.629 CI: 1.097-2.439), the collection of ticks from horses (OR = 1.939 CI: 0.999-3.764), the presence of capybaras (OR = 1.467 CI: 1.009-2.138), an urban environment (OR = 1.515 CI: 1.036-2.231), and the existence of a dirty pasture (OR = 1.759 CI: 1.028-3.003). Conclusions: The factors associated with the confi rmation of BSF cases included an urban environment, age, presence of the A. sculptum vector, the collection of ticks from horses, the presence of a capybara population, and a dirty pasture environment.

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Section: Discussionmentioning

confidence: 99%

Risk factors associated with the transmissionof Brazilian spotted fever in the Piracicaba river basin, State of São Paulo, Brazil

Souza

Pintér

Donalísio

2015

Rev. Soc. Bras. Med. Trop.

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“…Considerando que o conhecimento da situação da saúde na população é fundamental para o planejamento, a tomada de decisão, e a conseqüente implementação de ações em saúde, onde várias espécies de carrapatos atuam como vetores, por exemplo, de Rickettsia rickettsii causadora da Febre Maculosa Brasileira, tanto por espécies tidas como ectoparasitos de animais silvestres (aragão 1936; Lemos et al 1996;souza et al 2006;gazêta et al 2009), como de animais domésticos (Boero 1957;Barros-Batesti et al 2006;Pinter et al 2008;cunha et al 2009), é necessário conhecer a dimensão da ixodofauna que infecta humanos.…”

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Parasitismo humano por carrapatos na Mata Atlântica, Rio de Janeiro, Brasil.

Serra-Freire

Sena

Borsoi³

2011

EntomoBrasilis

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Resumo. Entre janeiro de 1997 e dezembro de 2007 foi realizada uma investigação epidemiológica objetivando identificar casos de parasitismo por carrapatos em humanos na comunidade que invadiu e está ocupando Área de Proteção Ambiental -(APA), entre o "Parque Estadual do Maciço da Pedra Branca" e o "Parque Nacional da Floresta da Tijuca" na cidade do Rio de Janeiro, RJ. Foram comprovados 6.072 casos de ixodidose, relacionados às espécies: Amblyomma aureolatum (Pallas), Amblyomma cajennense (Fabricius), Amblyomma dubitatum Neumann, Amblyomma ovale Kock, Amblyomma varium Kock, Ixodes loricatus Neumann e Rhipicephalus sanguineus (Latreille) em relação parasitária com moradores do espaço trabalhado. Foram calculados indicadores de saúde relacionados ao coeficiente de prevalência, índice de abundância, coeficiente de dominância, intensidade média de parasitismo, e coeficiente de correlação entre o parasitismo e o sexo, faixa etária, atividade social dos infectados, o risco relativo, e o risco atribuível para o parasitismo, e desenvolvida estatística descritiva para visualização do fenômeno, e estatística analítica dos dados para dar suporte às conclusões. Foi salientada a importância destas espécies de ixodídeos na transmissão de patógenos, bioagentes de doenças infecciosas reincidentes, ou de recém introdução no espaço geopolítico brasileiro. Palavras-Chave: Carrapato; humano; Parque Estadual da Pedra Branca; IxodidaeHuman Parasitism for Ticks in the Atlantic Forest, Rio de Janeiro, RJ, Brazil.Abstract. From January 1997 to December 2007 was carried out a epidemiologic investigation to identify a cases of parasitism in the human community that is invaded and occupied area of Environmental Protection -(BB), between the "State Park of the Pedra Branca" and "National Park of Tijuca Forest" located in Rio de Janeiro, RJ, Brazil. These work comprouved 6,072 cases of ixodidosis in relation with species: Amblyomma aureolatum (Pallas), Amblyomma cajennense (Fabricius), Amblyomma dubitatum Neumann, Amblyomma ovale Kock, Amblyomma varium Kock, Ixodes loricatus Neumann and Rhipicephalus sanguineus (Latreille) infected local human living into the space worked. Through an analysis of statistical data demonstrating transcribes the importance of transmission of pathogens and serves as a model for understanding of the human X tick.

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“…The seasonal distribution of the disease in Valinhos, where cases are prevalent between June and November, coincides with the period in which the nymph phase of A. cajennense is prevalent, and that has been observed in other endemic areas of São Paulo and Minas Gerais 36,[42][43][44] . This could be partly explained by the fact that stings from immature forms are less painful and are not noticed by humans, unlike the sting from an adult, which is painful; therefore, the person can rapidly notice it and remove the ixodid from the body, so it is not attached for too long and there is no time to transmit the bacteria 33 .…”

Section: Discussionmentioning

confidence: 54%

“…Besides the capybaras, the equines are also primary hosts of ticks transmitting the spotted fever 36 . Because the equines meet the criteria established for sentinel animals 37 , they have been used for this purpose; once they are prone to BSF, they present good immunological response and are not amplifiers of the agent 38,39 .…”

Section: Discussionmentioning

confidence: 99%

Urbanization of Brazilian spotted fever in a municipality of the southeastern region: epidemiology and spatial distribution

Nasser

Lana²,

Silva³

et al. 2015

Rev. bras. epidemiol.

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Introduction: Brazilian spotted fever is an emerging zoonosis notified mainly in the Southeast of Brazil, especially due to its high level of lethality. Objective: To analyze the epidemiological and spatial pattern of the disease in the municipality of Valinhos (106,793 inhabitants), São Paulo, Southeastern region of Brazil, in the period between 2001 and 2012. Methods: All laboratory-confirmed cases with likely site of infection in the city (n = 49) notified in the Brazilian Case Registry Database were studied. Sites were geocoded using the cartographic base of the city and Google Earth (geographic coordinates) with correction according to the Brazilian Geodetic System. We used the Kernel estimator to analyze the density of the cases on the map. Land cover and distance to basins of all cases were analyzed. Information about tick species and primary hosts were obtained from reports of the Superintendence of Control of Endemic Diseases. Results: Seasonality of the disease was observed with the highest incidence from June to November, and in 2005 and 2011. The most affected groups were men (79.6%) aged 20-49 years old (49%). Lethality was found to be 42.9%. Maps showed the progressive registration of cases in the urban area. Capybaras were reported as the main primary host, and Amblyomma cajennense was identified in probable sites of infection during field investigation. The likely sites of infection were mostly located near basins, dirty pastures, and bordering woods. Conclusions: The transmission pattern of Brazilian spotted fever in Valinhos is similar to that in other cities in the region, where capybara is the main primary host and an amplifier of R. rickettsii. Over the years, a higher occurrence of cases has been identified in the urban area of the city.

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Dinâmica sazonal de carrapatos (Acari: Ixodidae) na mata ciliar de uma área endêmica para febre maculosa na região de Campinas, São Paulo, Brasil

Cited by 37 publications

References 14 publications

Risk factors associated with the transmissionof Brazilian spotted fever in the Piracicaba river basin, State of São Paulo, Brazil

Risk factors associated with the transmissionof Brazilian spotted fever in the Piracicaba river basin, State of São Paulo, Brazil

Parasitismo humano por carrapatos na Mata Atlântica, Rio de Janeiro, Brasil.

Urbanization of Brazilian spotted fever in a municipality of the southeastern region: epidemiology and spatial distribution

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