Open AccessActive dispersal of Triatoma infestans and other triatomines in the Argentinean arid Chaco before and after vector control interventions
Author(s) -
Abrahan Luciana,
Gorla David,
Catalá Silvia
Publication year - 2016
Publication title -
journal of vector ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.688
H-Index - 51
eISSN - 1948-7134
pISSN - 1081-1710
DOI - 10.1111/jvec.12198
Subject(s) - triatoma infestans , reduviidae , biological dispersal , biology , vector (molecular biology) , triatominae , abiotic component , arid , hemiptera , ecology , population , trypanosoma cruzi , parasite hosting , demography , biochemistry , sociology , world wide web , computer science , gene , recombinant dna
Peridomestic structures are considered the main sites where Triatoma infestans (Hemiptera: Reduviidae) remain and disperse, representing the first risk factor for intradomestic invasion, even after vector control activities. This study analyzed T. infestans dispersal during vector control interventions in six rural houses of the arid Chaco (La Rioja, Argentina). Flying and walking dispersers were captured during five months of two consecutive warm seasons after insecticide spraying of intra‐ and peridomiciles. These data were compared with previous published data in the same scenario but without insecticide spraying in peridomiciles. Recorded climatic conditions were favorable for active dispersion during the study. Total number of T. infestans dispersers moving among domestic habitats decreased after insecticide spraying. Sylvatic triatomines T. guasayana, T. eratyrusiformis, T. garciabesi , and T. platensis , not targeted by insecticide spraying, were captured simultaneously within peridomestic areas and showed higher invasion pressure than T. infestans . Adult T. infestans peridomestic populations showed high nutritional status, indicating low dispersion probability. Some peridomiciles remained infested at the end of the study. However, no intradomiciles were recolonized. These results suggest that there is a low probability of intradomestic recolonization by active dispersion from peridomiciles during 15 months post‐spraying.