Dynamics of feeding and defecation in Triatoma vitticeps (Stal, 1859) (Hemiptera, Reduviidae, Triatominae) and its potential in the transmission of Trypanosoma cruzi
Dynamics of feeding and defecation in Triatoma vitticeps (Stal, 1859) (Hemiptera, Reduviidae, Triatominae) and its potential in the transmission of Trypanosoma cruzi
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DOI：
10.1590/s0074-02762006000500010
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发表时间：
2006-08-01
期刊：
影响因子：
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通讯作者：
Falqueto, Aloísio
中科院分区：
文献类型：
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作者：
Santos, Claudiney Biral dos;Leite, Gustavo Rocha;Falqueto, Aloísio
在巴西圣埃斯皮里托州的农村地区，经常有居民捕获到被类似于克氏锥虫的鞭毛虫感染的成年条纹头锥虫。观察了三组锥蝽成虫的摄食和排便动态。vitticeps和实验室饲养的标本和T.害虫观察锥蝽的时刻，他们提出了一个固定的鸡作为血粉来源，直到240分钟后，喂养结束。从摄食结束到排便的平均时间。infestans、野生T.后一种鱼的鱼腥藻和实验室饲养的标本分别为1.2、21.1和64分钟。所有T。infestans在10 min内排便，而野生和实验室饲养的T.这些结果可以解释T. vitticeps在T.在实验室饲养的T.鲸头鱼的出现可能表明该物种由于适应人工环境而发生的行为变化。
Adults of Triatoma vitticeps infected by flagellates similar to Trypanosoma cruzi are frequently captured by the inhabitants of rural areas in the Brazilian state of Espirito Santo. The dynamics of feeding and defecation were observed in three groups of adult triatomines, consisting of sylvatic T. vitticeps and laboratory-reared specimens of this species and T. infestans. Triatomines were observed from the moment they were presented with an immobilized chicken as a bloodmeal source until 240 min after feeding had ended. Mean times between the end of feeding and defecation for T. infestans, wild T. vitticeps and laboratory-reared specimens of the latter species were 1.2, 21.1, and 64 min respectively. All T. infestans defecated within 10 min of feeding, while only 29.9 of wild and 52.8% laboratory-reared specimens of T. vitticeps did so within this period These results may explain the low efficiency of T. vitticeps in T. cruzi transmission to man. The shorter time between feeding and defecation in laboratory-reared T. vitticeps may indicate a change in behaviour of this species as a result of adaptation to an artificial environment.