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

Overview of attention for article published in Revista da Sociedade Brasileira de Medicina Tropical, February 2015
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Title
Risk factors associated with the transmissionof Brazilian spotted fever in the Piracicaba river basin, State of São Paulo, Brazil
Published in
Revista da Sociedade Brasileira de Medicina Tropical, February 2015
DOI 10.1590/0037-8682-0281-2014
Pubmed ID
Authors

Celso Eduardo de Souza, Adriano Pinter, Maria Rita Donalisio

Abstract

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. This essay presents a retrospective study to identify the factors associated with the transmission of cases of BSF among all suspected cases identified 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 confirmed and discarded cases, a multiple logistic regression model was applied. We searched 569 probable locations of infection (PLI) with 210 (37%) confirmed cases of BSF and 359 (63%) discarded cases. The associated variables for the confirmation of BSF in the multiple logistic model using a confidence 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). The factors associated with the confirmation 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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Mendeley readers

The data shown below were compiled from readership statistics for 64 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 2 3%
Colombia 1 2%
Unknown 61 95%

Demographic breakdown

Readers by professional status Count As %
Student > Master 11 17%
Student > Bachelor 10 16%
Researcher 9 14%
Student > Doctoral Student 8 13%
Student > Ph. D. Student 7 11%
Other 12 19%
Unknown 7 11%
Readers by discipline Count As %
Medicine and Dentistry 19 30%
Agricultural and Biological Sciences 14 22%
Veterinary Science and Veterinary Medicine 9 14%
Nursing and Health Professions 3 5%
Engineering 2 3%
Other 5 8%
Unknown 12 19%