This difference was highly significant ( χ 2 = 34.93; p = < 0.0001) suggesting a strong association between nymphal stage and the presence of blood in the stomach in this species (Table 3 ).
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Panstrongylus geniculatus and four other species of triatomine bug involved in the Trypanosoma cruzi enzootic cycle: high risk factors for Chagas' disease transmission in the Metropolitan District of Caracas, Venezuela.
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