Pereira Marcos H, Gontijo Nelder F, Guarneri Alessandra A, Sant'Anna Maurício R, Diotaiuti Liléia
Departamento de Parasitologia do Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Caixa Postal 486, 31270-901, Belo Horizonte, MG, Brazil.
Trends Parasitol. 2006 Nov;22(11):516-20. doi: 10.1016/j.pt.2006.08.012. Epub 2006 Sep 12.
Brazil has just been certificated by Pan American Health Organization as 'free of Chagas disease transmission due to Triatoma infestans'. During the early 1980s, this species of blood-sucking bug alone was considered responsible for approximately 80% of Chagas disease transmission. But it was not always so. The species originally abundant in houses of central and eastern Brazil was Panstrongylus megistus, which seems to have been progressively displaced from houses by T. infestans during the past century. Indeed, T. infestans seems able to displace other Triatominae in artificial environments. Recent studies suggest that it might simply be because T. infestans feeds more efficiently than its Triatominae competitors.
巴西刚刚被泛美卫生组织认证为“因侵扰锥猎蝽而无恰加斯病传播”。在20世纪80年代初，仅这种吸血臭虫就被认为导致了约80%的恰加斯病传播。但情况并非一直如此。最初在巴西中部和东部房屋中大量存在的物种是巨蝽，在过去的一个世纪里，它似乎逐渐被侵扰锥猎蝽从房屋中取代。事实上，侵扰锥猎蝽似乎能够在人工环境中取代其他锥蝽亚科昆虫。最近的研究表明，这可能仅仅是因为侵扰锥猎蝽比其锥蝽亚科竞争对手进食效率更高。
