巴西亚马逊农村地区的虫媒病毒爆发。
Arbovirus outbreak in a rural region of the Brazilian Amazon.
机构信息
Instituto Evandro Chagas, Department of Arbovirology and Hemorrhagic Fevers, Ananindeua, Pará, Brazil.
Instituto Evandro Chagas, Department of Arbovirology and Hemorrhagic Fevers, Ananindeua, Pará, Brazil.
出版信息
J Clin Virol. 2022 Jun;150-151:105155. doi: 10.1016/j.jcv.2022.105155. Epub 2022 Apr 6.
BACKGROUND
An outbreak of febrile illness was reported from January to February 2018 in the Expedito Ribeiro Settlement, Santa Bárbara do Pará municipality, Pará State, Brazil.
OBJECTIVE
This study aimed to investigate the pathogenic agent responsible for the outbreak and the circulation of arboviruses in the region.
STUDY DESIGN
We analyzed 94 individuals through laboratory tests for arboviruses. Forty out of 94 individuals were asymptomatic but were living with or near febrile cases, and 55 participants were symptomatic.
RESULTS
Our results showed that 51.1% of the investigated individuals were positive for arboviruses (Oropouche, Mayaro, and Chikungunya), of which 77.8% were symptomatic. We detected 93.7% of positive cases for Oropouche infection, 2.1% for Mayaro fever, and 4.2% were positive for both Oropouche and Chikungunya infection.
CONCLUSION
Oropouche virus was mainly responsible for the outbreak; however, we also detected a few Chikungunya and Mayaro fever cases. Serologic assays showed evidence of arboviruses circulation of different genera in the area.
背景
2018 年 1 月至 2 月期间，巴西帕拉州圣巴巴拉多帕拉市的 Expedito Ribeiro 定居点报告了一起发热疾病疫情。
目的
本研究旨在调查导致疫情爆发的病原体以及该地区虫媒病毒的流行情况。
研究设计
我们通过实验室检测分析了 94 名个体的虫媒病毒。其中 40 名无症状个体与发热病例同住或附近居住，55 名参与者有症状。
结果
我们的结果显示，51.1%的调查对象（Oropouche、Mayaro 和 Chikungunya）呈虫媒病毒阳性，其中 77.8%有症状。我们检测到 93.7%的 Oropouche 感染阳性病例，2.1%的 Mayaro 发热病例，4.2%的 Oropouche 和 Chikungunya 双重感染阳性病例。
结论
Oropouche 病毒是此次疫情的主要病原体，但我们也检测到了少数 Chikungunya 和 Mayaro 发热病例。血清学检测结果表明该地区存在不同属的虫媒病毒循环。
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