Schistosomiasis Mansoni in the Amazon Region:Malacological Surveys of Intermediate Hosts for the Identification of Disease Transmission Areas in Belem,Para,Brazil

Christiane de Oliveira Goveia; Ricardo Jose de Paula Souza e Guimaraes; Marcio Roberto Teixeira Nunes; Isabelle Helena Lima Dias; Martin Johannes Enk

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Schistosomiasis Mansoni in the Amazon Region:Malacological Surveys of Intermediate Hosts for the Identification of Disease Transmission Areas in Belem,Para,Brazil

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In Brazil,schistosomiasis occurrence is related to the presence of the etiological agent Schistosoma mansoni.The presence of mollusks for Biomphalaria genus is a necessary condition for development of the parasite cycle.In Parástate,the species B.schrammi,B.kuhniana,B.straminea and B.glabrata have already been identified,with reports of the last two occurring in Belém.The aim of this study was to determine the spatial distribution of Biomphalaria species in Belém,Pará,Brazil,identifying risk areas for schistosomiasis transmission.Biannual malacological surveys were carried out between September 2013 and October 2017 in 35 neighborhoods of Belém.The collection points were georeferenced using a Global Positioning System(GPS)receiver and the Kernel Density Estimation(KDE)was used to the spatial analysis.The mollusks,after measurement,were exposed to light to verify the presence of S.mansoni cercariae.Subsequently,mollusks were sacrificed and fixed for dissection and morphological identification of species.The surveys resulted in a total of 10,803 mollusks collected,of which 9,367(86.70%)specimens were examined.Among the analyzed mollusks,5,820(62.14%)were identified as B.glabrata and 3,547(37.86%)as B.straminea.The presence of the parasite was observed in 208(2.22%)specimens,all B.glabrata.Positive mollusks were found in six neighborhoods:Guamá(51 mollusks/24.5%),Sacramenta(47 mollusks/22.6%),Telégrafo(47 mollusks/22.6%),Terra Firme(36 mollusks/17.3%),Condor(20 mollusks/9.6%)and Barreiro(7 mollusks/3.4%).This study confirms that B.glabrata species actively participates as intermediate host in the disease maintenance in Belém.The KDE allowed to analyze the spatial distribution of collection sites and consequently to determine possible risk areas of schistosomiasis transmission in Belem.The development of maps identifying sites with schistosomiasis positive snails may support efforts of this municipality by directing activities related to endemic disease control.

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《药剂与药理学：英文版》 |2019年第2期|P.51-60|共10页
作者
Christiane de Oliveira Goveia; Ricardo Jose de Paula Souza e Guimaraes; Marcio Roberto Teixeira Nunes; Isabelle Helena Lima Dias; Martin Johannes Enk;
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作者单位

[1]Instituto Evandro Chagas;

Secretaria de Vigilancia em Saude;

Ministerio da Saude-IEC/SVS/MS-Secao de Parasitologia;

Laboratario de Parasitoses Intestinais;

Esquistossomose e Malacologia;

Ananindeua;

Para;

Brasil;

[2]Programa de Pos-Graduacao em Biologia Parasitaria na Amazonia;

Universidade do Estado do Para-UEPA;

Belem;

Para;

Brasil;

[3]Instituto Evandro Chagas;

Secretaria de Vigilancia em Saude;

Ministerio da Saude;

Laboratorio de Geoprocessamento-LABGEO/IEC/SVS/MS;

Ananindeua;

Para;

Brasil;

[4]Instituto Evandro Chagas;

Secretaria de Vigilancia em Saude;

Ministerio da Saude;

Centro de Inovacoes Tecnologicas-CIT/IEC/SVS/MS;

Ananindeua;

Para;

Brasil;

[2]Programa de Pos-Graduacao em Biologia Parasitaria na Amazonia;

Universidade do Estado do Para-UEPA;

Belem;

Para;

Brasil;

[1]Instituto Evandro Chagas;

Secretaria de Vigilancia em Saude;

Ministerio da Saude-IEC/SVS/MS-Secao de Parasitologia;

Laboratario de Parasitoses Intestinais;

Esquistossomose e Malacologia;

Ananindeua;

Para;

Brasil;

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原文格式 PDF
正文语种 CHI
中图分类医药、卫生;
关键词
Biomphalaria spp.; Schistosoma mansoni; intermediate hosts; schistosomiasis; spatial analysis;

机译：Biomphalaria spp .;曼氏血吸虫;中间宿主;血吸虫病;空间分析;

Schistosomiasis Mansoni in the Amazon Region:Malacological Surveys of Intermediate Hosts for the Identification of Disease Transmission Areas in Belem,Para,Brazil

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