Chagas Disease Vectors of Paraguay: Entomoepidemiological Aspects of Triatoma sordida (Stal, 1859) and Development of an Identification Key for Paraguayan Triatomines Based on Cytogenetics Data

Autor(es)

Gonzalez-Britez, Nilsa Elizabeth ^[1] ; Chaboli Alevi, Kaio Cesar ^{[2, 3]} ; Caris Garcia, Ariane Cristina ^[2] ; Martinez Purroy, Clara Elena ^[4] ; Galvao, Cleber ^[5] ; Jose Carrasco, Hernan ^[4]

Afiliação do(s) autor(es)

^[1] Univ Nacl Asuncion, Inst Invest Ciencias Salud IICS, Dept Med Trop, Campus Univ, San Lorenzo - Paraguay

^[2] Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias Botucatu, Rua Dr Antonio Celso Wagner Zanin, Botucatu, SP - Brazil

^[3] Univ Estadual Paulista Julio de Mesquita Filho UN, Fac Ciencias Farmaceut, Lab Parasitol, Rodovia Araraquara Jau Km 1, Araraquara, SP - Brazil

^[4] Univ Cent Venezuela, Fac Med, Inst Med Trop, Lab Biol Mol Protozoarios, Caracas - Venezuela

^[5] Inst Oswaldo Cruz FIOCRUZ, Lab Nacl & Int Referencia Taxon Triatomineos, Pavilhao Rocha Lima, Rio De Janeiro, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: American Journal of Tropical Medicine and Hygiene; v. 105, n. 1, p. 130-133, JUL 2021.
• Citações Web of Science: 0

Resumo

Approximately 150,000 people are living with Chagas disease in Paraguay. Although the country has been since 2008 considered as one of the countries that succeeded in interrupted the vector transmission of Chagas by Triatoma infestans in houses of the eastern region, there are nine other species notified in the country that are potential vectors and also deserve attention from vector control programs. Thus, we carried out an entomoepidemiological study of T. sordida in the eastern and western regions of the country and we developed an identification key for Paraguay's triatomines based on cytogenetic data. Between the years 2003 to 2004, 271 specimens of T. sordida were captured in domestic, peridomestic, and wild ecotopes, with 131 insects caught in the eastern (Alto Paraguay, Boqueron and Pte. Hayes) and 140 in the western region of Paraguay (Guaira ` and Paraguari `). High rates of peridomicillary infestation were observed for both regions. Besides that, the natural infection of the captured insects was detected by optical microscopy in 12% and 10%, and by PCR in 21% and 20% in the eastern and western regions, respectively. Based on cytogenetic data from nine of ten species notified in Paraguay, an identification key was developed to differentiate all taxa. Thus, given the vectorial importance of T. sordida, we highlight the need for continued attention from Paraguay's vector control programs for this species. Further, we provide a taxonomic key that assists in the correct classification of Paraguayan triatomines. (AU)

• Processo FAPESP: 17/05015-7 - Estudo sobre hibridização em Triatoma sordida (Stal, 1859) (Hemiptera, Reduviidae): dinâmica evolutiva, viabilidade reprodutiva, caracterização morfo-molecular e suas implicações taxonômicas
• Beneficiário: Kaio Cesar Chaboli Alevi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado