Evaluación de la &lt;FONT FACE=Symbol&gt;b&lt;/font&gt;-cipermetrina para el control de Triatoma infestans

Zerba, Eduardo; Wallace, G. W.; Picollo, María Inés; Casabé, Norma; Licastro, S. de; Wood, E.; Hurvitz, Abel; Andrés, Américo

doi:10.1590/s1020-49891997000200007

Cited by 23 publications

(17 citation statements)

References 8 publications

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“…[27][28][29] On the other hand, systematic screening of donated blood with serological tests has been developed, to eliminate transfusion-associated transmission. 5 Such programs have received strong support in most South American countries, and proved highly successful in dramatically reducing the prevalence of the disease in the participating countries.…”

Section: Overview Of the Diseasementioning

confidence: 99%

Update on Chagas' disease in Mexico

Dumonteil

1999

Salud pública Méx

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Section: Overview Of the Diseasementioning

confidence: 99%

Update on Chagas' disease in Mexico

Dumonteil

1999

Salud pública Méx

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“…Since the 1980s, triatomine control has been primarily based on the use of pyrethroid residual insecticides that commonly have deltamethrin, lambdacyhalothrin and cypermethrin as active ingredients (Morel 1999). Pyrethroids are currently the main vector control tool because of their high efficacy, efficiency and residual activity, together with low risk of environmental contamination (Pinchin et al 1980, Zerba et al 1997, Gürtler et al 2004, Cecere et al 2006. After the remarkable success of the Southern Cone Initiative against Chagas disease vectors, which interrupted the vectorial transmission of T. cruzi in Uruguay, Chile, Brazil and several regions of Argentina and Paraguay, studies carried out during the last decade showed that vector control interventions in the Gran Chaco region had a lower performance compared with vector control interventions outside of the region (Schofield et al 2006).…”

mentioning

confidence: 99%

Residual effect of a micro-encapsulated formulation of organophosphates and piriproxifen on the mortality of deltamethrin resistant Triatoma infestans populations in rural houses of the Bolivian Chaco region

Alarico

Romero²,

Hernández³

et al. 2010

Mem. Inst. Oswaldo Cruz

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The Bolivian Chaco is part of the endemic region of Chagas disease and an area where pyrethroid resistant Triatoma infestans (Hemiptera: Reduviidae) populations has been reported. The World Health Organization identified these resistant populations as an important focus for research. The objective of this study was to evaluate the residual effect of a micro-encapsulated formulation containing organophosphate active ingredients and a juvenile hormone analogue (Inesfly 5A IGR) on the mortality of T. infestans. Studies took place in rural houses of the Bolivian Chaco that were treated up to 34 months before and evaluated the susceptibility to pyrethroids of the offspring of field collected insects. Thirty houses were randomly selected within three communities to carry out wall bio-assays with T. infestans nymphs. Mortality was recorded 24, 48 and 72 h after wall contact. Eggs laid by females collected in the area were used to obtain first-instar nymphs and carry out pyrethroid susceptibility tests. The wall bio-assays showed that the micro-encapsulated insecticide eliminates T. infestans populations and produces detectable mortality of insects exposed to walls treated 34 months prior to the tests. The discriminant dose of deltamethrin (0.01 mg/mL) showed 65% nymph survival, whereas at the highest tested dose (1.0 mg/mL) 14% of the nymphs survived. These results show that Inesfly 5A IGR is an appropriate tool for the elimination of intradomestic and peridomestic populations of T. infestans resistant to pyrethroids

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“…In earlier studies, our laboratory evaluation of ␤-cypermethrin against T. infestans nymphs and adult insects showed a performance similar to that of deltamethrin (15). The vector control and the cost-effectiveness ratio were very promising for this new pyrethroid.…”

Section: Discussionmentioning

confidence: 73%

“…Comparing the 50%-mortality lethal dose (LD 50 ) amounts, ␤-cypermethrin is three times more effective than deltamethrin for nymphs I and twice as effective for nymphs V, but slightly less effective for adult insects of Triatoma infestans (15). ␤-cypermethrin could thus be a promising alternative for Chagas' disease vector control.…”

Section: Introductionmentioning

confidence: 99%