1921
Volume 71, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

Mixed infestation of nymphs and adults of Stäl, 1859 and Latreille, 1811 was detected in 3 (15%) of 20 dwellings in El Guamito, an endemic focus of Chagas disease in Lara State, Venezuela. In one of the houses, both species were positive for : 14.3% () and 20% ( ). The overall infection rate in 143 of 352 was 16.1%. Parasites isolated from were identified as I by random amplified polymorphic DNA analysis. Dot–enzyme-linked immunosorbent assays of 36 showed that 58.3% of the had fed on humans. The gut contents of one fifth-instar nymph of that was positive for also reacted with anti-human serum. A questionnaire was used to gather data on the demographic and socioeconomic characteristics of the population. An indirect immunofluorescent test, an indirect hemaglutination test, and an ELISA were used to detect the presence of antibodies against in 84 of 86 inhabitants and in 15.5% of people more than 20 years old. The relative risk (RR) of infection was greater in men than in women (RR = 1.61, 95% confidence interval = 0.54–4.80). Of the people more than 15 years old, 36.6% had no formal education. All respondents recognized triatomine bugs, but they did not relate them to Chagas disease transmission. A total of 85.7% of the houses were “ranchos” suitable for the colonization of triatomine bugs. The possible domiciliation of and the implications of competition with for resources are discussed. Since there is no clear separation of food sources, abiotic factors such as microclimatic variation within houses may be critical to predict the outcome of the process of competition and potential domestication of this generally sylvatic species.

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2017-11-23
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References

  1. Dias JC, 2000. Chagas disease control and the natural history of human Chagas disease: a possible interaction? Mem Inst Oswaldo Cruz 95 (Suppl II): 14–22.
  2. Feliciangeli MD, Campbell-Lendrum D, Martinez C, Gonzalez D, Coleman P, Davies C, 2003. Chagas disease control in Venezuela: lessons for the Andean region and beyond. Trends Parasitol 19 : 44–49.
  3. Reyes-Lugo M, Rodriguez-Acosta A, 2000. Domiciliation of the sylvatic Chagas disease vector Panstrongylus geniculatus Latreille, 1811 (Triatominae: Reduviidae) in Venezuela. Trans R Soc Trop Med Hyg 94 : 508.
  4. Soto Vivas AA, Barazarte H, Molina de Fernández D, 2001. Primer registro de Eratyrus mucronatus (Hemiptera: Reduviidae) en el ambiente domiciliario en Venezuela. Entomotropica 16 : 215–217.
  5. Schofield CJ, 1994. Triatominae: Biología y Control. West Sussex, United Kingdom: Eurocommunica Publications.
  6. Anonymous, 1999. Recommendations from a Satellite Meeting. International Symposium to Commemorate the 90th Anniversary of the Discovery of Chagas Disease. April 11–16, 1999, Rio de Janeiro, Brazil. Mem Inst Oswaldo Cruz 94: 429–432.
  7. Miles MA, Povoa MM, Prata A, Cedillos RA, de Souza AA, Macedo V, 1981. Do radically dissimilar Trypanosoma cruzi strains (zymodemes) cause Venezuelan and Brazilian forms of Chagas’ disease? Lancet i : 1338–1340.
  8. Mendonça MBA, Neheme NS, Santos SS, Cupolillo E, Vargas N, Junqueira A, Naiff RD, Barrett TV, Coura JR, Zingales B, Fernandes O, 2002. Two main clusters within Trypanosoma cruzi zymodeme 3 are defined by distinct regions of the ribosomal RNA cistron. Parasitology 124 : 177–184.
  9. Gaunt M, Miles MA, 2000. The ecotopes and evolution of triatomine bugs (Triatominae) and their associated trypanosomes. Mem Inst Oswaldo Cruz 95 : 557–565.
  10. Feliciangeli MD, Dujardin JP, Bastrenta B, Mazzarri M, Villegas J, Flores M, Muñoz M, 2002. Is Rhodnius robustus (Hemiptera: Reduviidae) responsible for Chagas disease transmission in western Venezuela? Trop Med Int Health 7 : 180–187.
  11. Ewel JJ, Madriz A, 1968. Zonas de Vida de Venezuela. Memoria Explicativa Sobre el Mapa Ecológico. Caracas: Editorial Sucre.
  12. OCEI, 1990. XII Censo General de la Población y Vivienda. Nomenclador de Centros Poblados. Caracas: OCEI
  13. Miles MA, 1993. Culturing and biological cloning of Trypanosoma cruzi. Hyde JE, ed. Methods in Molecular Biology, Protocols in Molecular Parasitology. Totowa, NJ: Humana Press Inc., 15–28.
  14. Carrasco HJ, Frame IA, Valente SA, Miles MA. Genetic exchange as possible source of genomic diversity in sylvatic populations of Trypanosoma cruzi. Am J Trop Med Hyg 54 : 418–424.
  15. Gomez B, Sanchez E, Feliciangeli MD, 1998. Man-vector contact of phlebotomine sandflies (Diptera: Psychodidae) in north-central Venezuela, as assessed by bloodmeal identification using a dot-ELISA. J Am Mosq Control Assoc. 14 : 28–32.
  16. Agrela I, Sánchez E, Gomez B, Feliciangeli MD, 2002. Feeding behavior of Lutzomyia pseudolongipalpis (Diptera: Psychodidae), a putative vector of visceral leishmaniasis in Venezuela. J Med Entomol 39 : 440–445.
  17. Camargo ME, 1966. Fluorescent antibody test for the diagnosis of American trypanosomiasis. Technical modification employing preserved culture forms of Trypanosoma cruzi in a slide test. Rev Inst Med Trop Sao Paulo 8: 227–234.
  18. Kagan IG. 1970. Serologic diagnosis of parasitic diseases. N Engl J Med 282 : 685–686.
  19. Maekelt GA, 1960. Die komplement bindungs reaction der Chagas krankheit. Z Trop Med Parasitol 21 : 39–44.
  20. Deane MP, Kenzi HL, Jansen AM, 1986. Double development cycle of Trypanosoma cruzi in the opossum. Parasitol Today 2 : 146–147.
  21. Lent H, Wygodzinsky P, 1979. Revision of the Triatominae (Hemiptera, Reduviidae), and their significance as vectors of Chagas’disease. Bull Am Mus Nat Hist 163 : 123–520.
  22. Povoa MM, de Souza AA, Naif RD, Arias JR, Naif MF, Biancardi CB, Miles MA, 1984. Chagas disease in the Amazon Basin. IV. Host records of Trypanosoma cruzi zymodemes in the States of Amazonia and Rondonia. Brazil. Ann Trop Med Parasitol 78 : 479–487.
  23. Valente VC, Valente SAS, Noireau F, Carrasco HJ, Miles MA, 1998. Chagas disease in the Amazon basin: association of Panstrongylus geniculatus (Hemiptera: Reduviidae) with domestic pigs. J Med Entomol 35 : 99–103.
  24. Lotka AJ, 1925. Elements of Physical Biology. Baltimore: Williams & Wilkins.
  25. Volterra V, 1926. Variations and fluctuations of the number of individuals in animal species living together. Chapman RN, ed. Animal Ecology. New York: McGraw-Hill, 409–448.
  26. Gause GF, 1934. The Struggle for Existence. New York: Hafner.
  27. Bar ME, Oscherov EB, Dambrovsky MP, Porcel EA, Alvarez BM, 1994. Interaction between populations of Triatoma infestans and Triatoma sordida. Rev Saude Publica 28 : 59–68.
  28. Noireau F, Brenière SF, Cardozo L, Bosseno MF, Vargas F, Peredo C, Medinacelli M, 1996. Current spread of Triatoma infestans at the expense of Triatoma sordida in Bolivia. Mem Inst Oswaldo Cruz 91 : 271–272.
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  • Received : 18 Aug 2003
  • Accepted : 06 Feb 2004

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