Feeding behavior of triatomines from the southwestern United States: An update on potential risk for transmission of Chagas disease

Klotz, Stephen A.; Dorn, Patricia L.; Klotz, John H.; Pinnas, Jacob L.; Weirauch, Christiane; Kurtz, Jonathan R.; Schmidt, Justin O.

doi:10.1016/j.actatropica.2009.03.003

Cited by 63 publications

(54 citation statements)

References 20 publications

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“…15 A recent study of infection rates of T. protracta from Escondido in southern California was based on only 20 specimens, four (20%) of which were positive by PCR detection. 3 Our study, which was based on a larger sample size, shows virtually identical prevalence for Escondido (19%), but a much higher infection rate for Glendora (36%), which indicated that infection levels of T. protracta may show significant geographic variation. All phylogenetic analyses of the 24Sα dataset found the isolates from California to be closely related to the TcII and TcVI group members.…”

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confidence: 78%

“…Human bites by T. protracta in houses occur when T. protracta is attracted to lights on warm evenings. 2 The low incidence of autochthonous T. cruzi transmission may be explained by the transmission inefficacy of endemic kissing bugs, especially T. protracta , 3 but also by limited contact of humans with the vectors, or low infection rates of kissing bugs with T. cruzi . Autochthonous transmission in the southwestern United States is rare, although studies based on blood bank screenings and serosurveys suggest undiagnosed cases.…”

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confidence: 99%

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Infection Rates of Triatoma protracta (Uhler) with Trypanosoma cruzi in Southern California and Molecular Identification of Trypanosomes

Hwang

Zhang²,

Maslov³

et al. 2010

The American Society of Tropical Medicine and Hygiene

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Abstract. We report Trypanosoma cruzi infection rates of the native kissing bug Triatoma protracta in southern California. The rates are within the historically reported range, but differ significantly between the two sites (19% in Escondido and 36% in Glendora). Identification of T. cruzi in T. protracta was conducted for the first time by using partial 18S ribosomal RNA and 24Sα ribosomal RNA sequences. Incongruence of 24Sα ribosomal RNA phylogeny with current T. cruzi genotype classification supports non-clonality of some T. cruzi genotypes.

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confidence: 78%

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confidence: 99%

Infection Rates of Triatoma protracta (Uhler) with Trypanosoma cruzi in Southern California and Molecular Identification of Trypanosomes

Hwang

Zhang²,

Maslov³

et al. 2010

The American Society of Tropical Medicine and Hygiene

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“…Studies on the behaviour of triatomine species provide a greater understanding of the habits of these insects and therefore facilitate improved decision-making regarding the priorities for vector control. To our knowledge, there has been no study of the biological parameters (life cycle and feeding and defecation behaviours) of T. recurva; in contrast, two recent studies were devoted to the examination of certain behaviours of T. protracta (Martínez-Ibarra et al 2007, Klotz et al 2009) and three studies focused on T. rubida (Martínez-Ibarra et al 2005, Klotz et al 2009, Reisenman et al 2011. Even though the biological parameters of the two latter species have been studied previously, it is necessary to determine the particular behaviours of geographically distinct populations of the same species because it is likely that differing environmental conditions result in different behaviours for distinct populations of the same triatomine species (Licón-Trillo et al 2010).…”

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The biology of three Mexican-American species of Triatominae (Hemiptera: Reduviidae): Triatoma recurva, Triatoma protracta and Triatoma rubida

Martínez-Ibarra

Paredes-González

Licón-Trillo

et al. 2012

Mem. Inst. Oswaldo Cruz

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Biological information is widely available for the 13 most common domestic triatomines (Hemiptera: Reduviidae: Triatominae) among the 30 species described in Mexico (Martínez-Ibarra et al. 2007, Salazar-Schettino et al. 2010). Information about the remaining species is scarce, primarily because these species have rarely been collected and are difficult to raise under laboratory conditions. Three of these rare species are Triatoma recurva (Stal), Triatoma protracta (Uhler) and Triatoma rubida (Uhler). Although these three species are considered to be of low epidemiological importance, specimens of at least two of these species (T. recurva and T. rubida) collected from inside human dwellings were found to be infected with Trypanosoma cruzi (Paredes-González et al. 2001, Licón-Trillo 2006, Breniere et al. 2010, Licón-Trillo et al. 2010. Studies on the behaviour of triatomine species provide a greater understanding of the habits of these insects and therefore facilitate improved decision-making regarding the priorities for vector control. To our knowledge, there has been no study of the biological parameters (life cycle and feeding and defecation behaviours) of T. recurva; in contrast, two recent studies were devoted to the examination of certain behaviours of T. protracta (Martínez-Ibarra et al. 2007, Klotz et al. 2009) and three studies focused on T. rubida (Martínez-Ibarra et al. 2005, Klotz et al. 2009, Reisenman et al. 2011. Even though the biological parameters of the two latter species have been studied previously, it is necessary to determine the particular behaviours of geographically distinct populations of the same species because it is likely that differing environmental conditions result in different behaviours for distinct populations of the same triatomine species (Licón-Trillo et al. 2010).As part of a series of studies on the biology of Mexican Triatominae, a study of the feeding and defecation behaviours and the life cycles of three Triatominae species of secondary importance in the transmission of T. cruzi to human populations in Mexico was conducted. MATERIALS AND METHODSA laboratory colony of T. recurva established in 2009 from specimens collected in Jesús María, Nayarit, Mexico, was used. A colony of T. protracta (morphologically similar to the synonymised subspecies protracta) was established in 2008 with specimens originally obtained from Caborca, Sonora, Mexico. In addition, a colony of T. rubida (morphologically similar to the synonymised subspecies uhleri) from Saucillo, Chihuahua, was included. The colonies were maintained at 25ºC ± 1ºC and 50% relative humidity (RH) ± 5% RH to match the typical habitat conditions of the three species. The colonies were fed on immobilised and anaesthetised New Zealand rabbits on a weekly basis. These rabbits were anaesthetised following the Norma Official Mexicana regulations with 0.25 mL/kg of ketamine delivered intramuscularly (SAGARPA 1999

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“…Entre los factores que contribuyen con esta situación, se destacan las precarias condiciones de vivienda de la población y el limitado acceso a los servicios de salud, lo que, aunado a la ausencia de síntomas durante la enfermedad, eleva las probabilidades de que las personas desconozcan que son positivas para T. cruzi cuando migran de su país de origen hacia zonas no endémicas. De esta manera, el parásito puede diseminarse, ya sea por vía congénita o por transfusión sanguínea (33).…”

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Anti-Trypanosoma cruzi antibodies in Latin American migrants in transit through the México- USA border

2018

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Introducción. En los últimos años, la tripanosomiasis americana se ha convertido en un problema de salud pública emergente en países receptores de poblaciones migrantes, como México, Estados Unidos, Canadá y los países europeos.Objetivo. Analizar la prevalencia de anticuerpos anti-Trypanosoma cruzi mediante técnicas serológicas, en los migrantes latinos en su paso hacia Estados Unidos y Canadá.Materiales y métodos. Se hicieron análisis serológicos mediante ELISA y la prueba de hemaglutinación indirecta (HAI) para detectar anticuerpos anti-T. cruzi, y encuestas socioeconómicas para determinar los factores asociados a los casos seropositivos que favorecieron la transmisión en el país de origen de los migrantes.Resultados. La seroprevalencia total en la población estudiada fue del 20 % (24/120). La prevalencia más alta se encontró en migrantes de Guatemala, con 37,5 % (6/16), seguidos de los de Honduras (22,6 %; 12/53), El Salvador (16 %; 4/25) y México (8,7 %; 3/23). De los 120 migrantes encuestados, 105 (87,5 %) reconocieron el vector y 62 (59 %) afirmaron haber sido picados por este. La asociación de la infección con los materiales de construcción de las paredes de las viviendas, así como con la presencia de mascotas (perros) en los hogares, fue muy significativa (p≤0,01). La asociación con el material de construcción del patio, los servicios básicos precarios, así como la cría de animales dentro de corrales en la periferia de los hogares, también fue significativa (p≤0,05).Conclusión. Los países no endémicos que reciben migrantes de zonas endémicas deben mejorar o desarrollar políticas de salud para prevenir la transmisión del parásito por transfusión o por vía congénita.

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Feeding behavior of triatomines from the southwestern United States: An update on potential risk for transmission of Chagas disease

Cited by 63 publications

References 20 publications

Infection Rates of Triatoma protracta (Uhler) with Trypanosoma cruzi in Southern California and Molecular Identification of Trypanosomes

Infection Rates of Triatoma protracta (Uhler) with Trypanosoma cruzi in Southern California and Molecular Identification of Trypanosomes

The biology of three Mexican-American species of Triatominae (Hemiptera: Reduviidae): Triatoma recurva, Triatoma protracta and Triatoma rubida

Anti-Trypanosoma cruzi antibodies in Latin American migrants in transit through the México- USA border

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