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Geographic distribution and morphometric differentiation of Triatoma nitida usinger 1939 (Hemiptera: Reduviidae: Triatominae) in Guatemala

Geographic distribution and morphometric differentiation of Triatoma nitida usinger 1939 (Hemiptera: Reduviidae: Triatominae) in Guatemala

A comparative study of the male external genitalia of Triatoma neotomae Neiva, 1911 and Triatoma nitida Usinger, 1939 (Hemiptera: Reduviidae)

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Biologia do Triatoma nitida Usinger, 1939 em laboratório (Hemiptera: Reduviidae)

DOI: 10.1590/S0074-02761995000500024

Keywords: life cycle, triatoma nitida, triatominae, chagas' disease.

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Abstract:

triatoma nitida is a wild species occurring in mexico and central america. in order to establish the length of its life cycle and transmission potential, the following parameters were observed: the incubation period, the interval between hatching, or moulting, and the first feeding; the number of blood meals and the time of development. the time-lapse before the bite, the length of feeding and the interval between the end of the blood meal and defecation, as well as the site of defecation were also analyzed. average length of the egg incubation period was 18.2 days. time interval between the food source offering and the bite was less than 4 min in 60//of the analyzed cases, except in the fifth instar, where only 38//of the insects began feeding in less than 5 min. the blood-sucking period was long and rising until the fifth instar, decreasing in adults, and ranging from 1 min to 2 and a half hours. only 26//of the blood meals were followed by defecations within 20 min. the average length of the life cycle was 897.5 days.

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