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Bionomics and Spatial Distribution of Triatomine Vectors of Trypanosoma cruzi in Texas and Other Southern States, USA.
Curtis-Robles, Rachel; Hamer, Sarah A; Lane, Sage; Levy, Michael Z; Hamer, Gabriel L.
Affiliation
  • Curtis-Robles R; Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, Texas.
  • Hamer SA; Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, Texas.
  • Lane S; Department of Epidemiology and Biostatistics, Texas A&M Health Science Center, College Station, Texas.
  • Levy MZ; Department of Biostatistics and Epidemiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.
  • Hamer GL; Department of Entomology, Texas A&M University, College Station, Texas.
Am J Trop Med Hyg ; 98(1): 113-121, 2018 01.
Article de En | MEDLINE | ID: mdl-29141765
ABSTRACT
Defining spatial and temporal occurrences of triatomine vectors of Trypanosoma cruzi, the agent of Chagas disease, in the US is critical for public health protection. Through a citizen science program and field collections from 2012 to 2016, we collected 3,215 triatomines, mainly from Texas. Using morphological and molecular approaches, we identified seven Triatoma species and report sex, length, and blood engorgement status. Many citizen-collected triatomines (92.9%) were encountered indoors, in peridomestic settings, or in dog kennels and represent spillover transmission risk of T. cruzi to humans and domestic animals. The most commonly collected species were Triatoma gerstaeckeri and Triatoma sanguisuga. Adult T. gerstaeckeri were collected from May to September, peaking from June to July, whereas adult T. sanguisuga were active later, from June to October, peaking from July to September. Based on cross correlation analyses, peaks of captures varied by species and across years. Point pattern analyses revealed unique occurrences of T. sanguisuga in north and east Texas, T. gerstaeckeri in south and west Texas, Triatoma indictiva and Triatoma lecticularia in central Texas, and Triatoma rubida in west Texas. These relatively unique spatial occurrences suggest associations with different suitable habitats and serve as a basis for future models evaluating the ecological niches of different vector species. Understanding the temporal and spatial heterogeneity of triatomines in the southern United States will improve targeted interventions of vector control and will guide public outreach and education to reduce human and animal contact with vectors and reduce the risk of exposure to T. cruzi.
Sujet(s)

Texte intégral: 1 Collection: 01-internacional Base de données: MEDLINE Sujet principal: Trypanosoma cruzi / Triatominae Limites: Animals / Female / Humans / Male Pays/Région comme sujet: America do norte Langue: En Journal: Am J Trop Med Hyg Année: 2018 Type de document: Article

Texte intégral: 1 Collection: 01-internacional Base de données: MEDLINE Sujet principal: Trypanosoma cruzi / Triatominae Limites: Animals / Female / Humans / Male Pays/Région comme sujet: America do norte Langue: En Journal: Am J Trop Med Hyg Année: 2018 Type de document: Article