Peridomestic colonization of Triatoma longipennis (Hemiptera, Reduviidae) and Triatoma barberi (Hemiptera, Reduviidae) in a rural community with active transmission of Trypanosoma cruzi in jalisco state, Mexico.
Infestation of peridomiciles is likely a major risk factor for Chagas disease transmission in Jalisco state, Mexico. An entomological and serological survey of a typical village was conducted between July and September 2003. The peridomestic areas of 100 dwellings were visited and triatomines were searched manually in 369 potential sites. A total of 1821 Triatoma longipennis (93.2%) or Triatoma barberi was captured. Both species frequently occurred in sympatry. The infestation index was 60% for T. longipennis and 16% for T. barberi. T. longipennis occurred throughout the village. Colonization indices were high for T. longipennis (93%) and T. barberi (75%), suggesting that both species have adapted to peridomestic habitats. The bug population size was larger for T. longipennis than for T. barberi. Five very large colonies of T. longipennis were recorded whereas only 1 or 2 bugs were observed in 38% of the positive sites, which suggests intense dispersal activity. Both species exhibited high infection prevalence with Trypanosoma cruzi (46%). Only T. cruzi lineage I was detected. Human seroprevalence was 1.8%. This study serves as an entomological overview of peridomiciliar triatomine colonization in a Mexican village and highlights the current risk of Chagas disease transmission.
Brenière
Simone Frédérique
SF
Département Sociétés et Santé, Institut de Recherche pour le Développement (IRD), UR 008 and UR 016 Montpellier, France. breniere@mpl.ird.fr
Bosseno
Marie-France
MF
Magallón-Gastelúm
Ezequiel
E
Castillo Ruvalcaba
Eloy Gualberto
EG
Gutierrez
Margarita Soto
MS
Montaño Luna
Eloy Christian
EC
Basulto
Jorge Tejeda
JT
Mathieu-Daudé
Françoise
F
Walter
Annie
A
Lozano-Kasten
Felipe
F
D000293:Adolescent; D000328:Adult; D000818:Animals; D014355:Chagas Disease / Q000453:epidemiology / Q000635:transmission*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006798:Housing; D006801:Humans; D007303:Insect Vectors; D008297:Male; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D012424:Rural Population; D014224:Triatoma; D014349:Trypanosoma cruzi / Q000472:pathogenicity*