Ecotopes, natural infection and trophic resources of Triatoma brasiliensis (Hemiptera, Reduviidae, Triatominae)

被引:63
作者
Costa, J
de Almeida, JR
Britto, C
Duarte, R
Marchon-Silva, V
Pacheco, RD
机构
[1] Inst Oswaldo Cruz, Dept Entomol, BR-21045900 Rio De Janeiro, RJ, Brazil
[2] Inst Oswaldo Cruz, Dept Bioquim & Biol Mol, BR-21045900 Rio De Janeiro, RJ, Brazil
[3] Univ Fed Rio de Janeiro, Dept Ecol, Rio De Janeiro, RJ, Brazil
[4] Escola Nacl Saude Publ Fiocruz, Dept Ciencias Biol, Rio De Janeiro, RJ, Brazil
来源
MEMORIAS DO INSTITUTO OSWALDO CRUZ | 1998年 / 93卷 / 01期
关键词
Triatoma brasiliensis; ecotopes; trophic resources; natural infection; different colour patterns;
D O I
10.1590/S0074-02761998000100002
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
Triatoma brasiliensis is considered as one of the most important Chagas disease vectors in the northeastern Brazil. This species presents chromatic variations which led to descriptions of subspecies, synonymized by Lent and Wygodzinsky (1979). In order to broaden bionomic knowledge of these distinct colour patterns of T. brasiliensis, captures were performed at different sites, where the chromatic patterns were described: Caico, Rio Grande do Norte (T. brasiliensis brasiliensis Neiva, 1911), it will be called the "brasiliensis population"; Espinosa, Minas Gerais (T. brasiliensis melanica Neiva & Lent 1941), the "melanica population" and Petrolina, Pernambuco (T. brasiliensis macromelasoma, Galvao 1956), the "macromelasoma population". A fourth chromatic pattern was collected in Juazeiro, Bahia the darker one in overall cuticle coloration, the "Juazeiro population". At the sites of Caico, Petrolina and Juazeiro, specimens were captured in peridomiciliar ecotopes and in wilderness. In Espinosa the specimens were collected only in wilderness, even though sever-al exhaustive captures have been performed in peridomicile at different sites of this municipality. A total of 298 specimens were captured The average register ed infection rate was 15% for "brasiliensis population" and of 6.6% for "melanica population". Specimens of "macromelasoma" and of "Juazeiro populations" did not present natural infection. Concerning trophic resources, evaluated by the precipitin test, feeding eclecticism for the different colour patterns studied was observed, with dominance of goat blood in household surroundings as well as in wilderness.
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页码:7 / 13
页数:7
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