Souza Celso Eduardo de, Pinter Adriano, Donalisio Maria Rita
Laboratório de Carrapatos, Superintendência de Controle de Endemias, Mogi Guaçu, SP, Brazil.
Coordenação dos Laboratórios de Referência e Desenvolvimento Científico, Superintendência de Controle de Endemias, São Paulo, SP, Brazil.
Rev Soc Bras Med Trop. 2015 Jan-Feb;48(1):11-7. doi: 10.1590/0037-8682-0281-2014. Epub 2015 Jan 1.
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.
巴西斑疹热（BSF）是一种由蜱传播的疾病，其病原体是立氏立克次体。本文评估了2003年至2013年期间圣保罗州皮拉西卡巴河流域与BSF病例传播相关的风险因素。
本文进行了一项回顾性研究，以确定圣保罗州流行病学监测系统（CVE）所识别的所有疑似病例中与BSF病例传播相关的因素。在描述了确诊和排除病例的时间分布（症状发作）以及环境和人口统计学变化之后，应用了多元逻辑回归模型。
我们搜索了569个可能的感染地点（PLI），其中210例（37%）为确诊的BSF病例，359例（63%）为排除病例。在使用95%置信区间（CI）的多元逻辑模型中，与BSF确诊相关的变量包括年龄（OR = 1.025，CI：1.015 - 1.035）、环境中存在刻点钝缘蜱（OR = 1.629，CI：1.097 - 2.439）、从马身上采集蜱（OR = 1.939，CI：0.999 - 3.764）、存在水豚（OR = 1.467，CI：1.009 - 2.138）、城市环境（OR = 1.515，CI：1.036 - 2.231）以及存在脏牧场（OR = 1.759，CI：1.028 - 3.003）。
与BSF病例确诊相关的因素包括城市环境、年龄、刻点钝缘蜱媒介的存在、从马身上采集蜱、水豚种群的存在以及脏牧场环境。
