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Survey of Bancroftian filariasis infection in humans and Culex mosquitoes in the western Brazilian Amazon region: implications for transmission and control
Korte, Rodolfo Luís; Fontes, Gilberto; Camargo, Juliana de Souza Almeida Aranha; Rocha, Eliana Maria Maurício da; Araújo, Edicarlos André Cavalcante de; Oliveira, Marcelo Zagonel de; Santos, Rafael Vital dos; Camargo, Luís Marcelo Aranha.
  • Korte, Rodolfo Luís; Faculdade São Lucas. Departamento de Medicina. Porto Velho. BR
  • Fontes, Gilberto; Faculdade São Lucas. Departamento de Medicina. Porto Velho. BR
  • Camargo, Juliana de Souza Almeida Aranha; Faculdade São Lucas. Departamento de Medicina. Porto Velho. BR
  • Rocha, Eliana Maria Maurício da; Faculdade São Lucas. Departamento de Medicina. Porto Velho. BR
  • Araújo, Edicarlos André Cavalcante de; Faculdade São Lucas. Departamento de Medicina. Porto Velho. BR
  • Oliveira, Marcelo Zagonel de; Faculdade São Lucas. Departamento de Medicina. Porto Velho. BR
  • Santos, Rafael Vital dos; Faculdade São Lucas. Departamento de Medicina. Porto Velho. BR
  • Camargo, Luís Marcelo Aranha; Faculdade São Lucas. Departamento de Medicina. Porto Velho. BR
Rev. Soc. Bras. Med. Trop ; 46(2): 214-220, Mar-Apr/2013. tab, graf
Article in English | LILACS | ID: lil-674641
ABSTRACT
Introduction The aim of this work was to identify possible lymphatic filariasis foci in the western Brazilian Amazonian that could be established from the reports of Rachou in the 1950s. The study was conducted in three cities of the western Brazilian Amazon region - Porto Velho and Guajará-Mirim (State of Rondônia) and Humaitá (State of Amazonas). Methods For human infection evaluation thick blood smear stained with Giemsa was used to analyze samples collected from 10pm to 1am. Polymerase chain reaction (PCR) was used to examine mosquito vectors for the presence of Wuchereria bancrofti DNA. Humans were randomly sampled from night schools students and from inhabitants in neighborhoods lacking sanitation. Mosquitoes were collected from residences only. Results A total 2,709 night students enrolled in the Program for Education of Young Adults (EJA), and 935 people registered in the residences near the schools were examined, being 641 from Porto Velho, 214 from Guajará-Mirim and 80 from Humaitá. No individual examined was positive for the presence of microfilariae in the blood stream. A total of 7,860 female Culex quinquefasciatus specimens examined were negative by PCR. Conclusions This survey including human and mosquito examinations indicates that the western Amazon region of Brazil is not a focus of Bancroftian filariasis infection or transmission. Therefore, there is no need to be included in the Brazilian lymphatic filariasis control program. .
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Wuchereria bancrofti / Elephantiasis, Filarial / Insect Vectors / Culicidae Type of study: Diagnostic study / Prognostic study / Screening study Limits: Animals / Humans Country/Region as subject: South America / Brazil Language: English Journal: Rev. Soc. Bras. Med. Trop Journal subject: Tropical Medicine Year: 2013 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: Faculdade São Lucas/BR

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Full text: Available Index: LILACS (Americas) Main subject: Wuchereria bancrofti / Elephantiasis, Filarial / Insect Vectors / Culicidae Type of study: Diagnostic study / Prognostic study / Screening study Limits: Animals / Humans Country/Region as subject: South America / Brazil Language: English Journal: Rev. Soc. Bras. Med. Trop Journal subject: Tropical Medicine Year: 2013 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: Faculdade São Lucas/BR