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Am. J. Trop. Med. Hyg., 68(6), 2003, pp. 692-694
Copyright © 2003 by The American Society of Tropical Medicine and Hygiene

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SHORT REPORT: VARIATION IN MITOCHONDRIAL 12S AND 16S RIBOSOMAL DNA SEQUENCES IN NATURAL POPULATIONS OF TRIATOMA INFESTANS (HEMIPTERA: REDUVIIDAE)

BEATRIZ A. GARCÍA, CANDELA MANFREDI, LAURA FICHERA, AND ELSA L. SEGURA
Cátedra de Bioquímica y Biología Molecular, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina; Instituto Nacional de Parasitología Dr. Mario Fatala Chabén, Administración Nacional de Laboratorios e Institutos de Salud, Ministerio de Salud de Argentina, Buenos Aires, Argentina

 

ABSTRACT

Mitochondrial DNA sequences of the 12S and 16S ribosomal RNA genes were analyzed in five natural populations of the Chagas’ disease vector Triatoma infestans from Argentina. DNA sequence comparisons of 878 basepairs (12S plus 16S) revealed 13 haplotypes. A total of 10 private haplotypes were found in four of the populations analyzed, suggesting low current levels of genetic exchange. The levels of genetic differentiation between the population of Chancaní (Córdoba) and other two of the populations analyzed indicated significant deviation from a pattern of unrestricted gene flow. The haplotypic diversity and the private haplotypes found in the geographically closest localities of Chancaní and El Jardín (La Rioja) suggest that the reduction in the population size by insecticide treatment did not avoid the recovery of the populations apparently from survivors of the same area.

Received November 7, 2002. Accepted for publication March 12, 2003.

Acknowledgment: We thank Octavio Fusco (Servicio de Secuenciación del Instituto Nacional de Parasitología Dr. Mario Fatala Chabén) for sequencing the 16S ribosomal DNA sequences.

Financial support: This research was partially supported by the grants from the Secretaría de Ciencia y Tecnología de la Universidad Nacional de Córdoba and Banco de la Nación Argentina, the Secretaría de Ciencia y Tecnología de la Universidad Nacional de La Rioja, and Mundo Sano. Beatriz A. Garcia, Laura Fichera, and Elsa L. Segura are Career Investigators of the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) of Argentina.

Authors’ addresses: Beatriz A. García and Candela Manfredi, Cátedra de Bioquímica y Biología Molecular, Pabellón Argentina 2° Piso, Ciudad Universitaria, 5016 Córdoba, Argentina, Telephone: 54-351-433-3024, Fax: 54-351-433-3072 E-mail: bgarcia{at}biomed.uncor.edu. Laura Fichera and Elsa L. Segura, Instituto Nacional de Parasitología Dr. Mario Fatala Chabén, Avenida Paseo Colón 568, 1063 Buenos Aires, Argentina.

Reprint requests: Beatriz A. García, CC 35, Suc. 16, 5016 Córdoba, Argentina.




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C. E. Almeida, R. S. Pacheco, K. Haag, S. Dupas, E. M. Dotson, and J. Costa
Inferring from the Cyt B Gene the Triatoma brasiliensis Neiva, 1911 (Hemiptera: Reduviidae: Triatominae) Genetic Structure and Domiciliary Infestation in the State of Paraiba, Brazil
Am J Trop Med Hyg, May 1, 2008; 78(5): 791 - 802.
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Copyright © 2003 by the American Society of Tropical Medicine and Hygiene.