INTRODUCTION: Entomological surveillance of Chagas disease in the Federal District of Brazil (DF), has recorded the following triatomine species: Panstrongylus megistus, P. geniculatus, P. diasi, Rhodnius neglectus, Triatoma pseudomaculata, and T. sordida. We aimed to analyze the spatial and temporal occurrence of triatomine species collected in DF, and their indices of natural infection with trypanosomes. METHODS: The Health State Secretariat of DF recorded triatomines between 2002 and 2010 in 20 administrative regions. This retrospective analysis considered the number of adults and nymphs of each species collected and infected in both intradomicile and peridomicile. RESULTS: A total of 754 triatomines were collected in 252 reported domiciles. Panstrongylus megistus was the most frequent species (65%), followed by T. pseudomaculata (14%). Of the 309 examined insects, only 3 (1%) specimens of P. megistus were infected with flagellates morphologically similar to Trypanosoma cruzi. The spatial occurrence indicated a higher diversity of triatomines and frequency of T. sordida in rural areas. Moreover, there was a predominance of P. megistus in urban areas. The number of records of P. megistus in the rainy season was two times higher than that during the dry season. The largest number of triatomines was collected in November. CONCLUSIONS: The presence of P. megistus specimens infected with trypanosomes in domiciles, shows the potential risk of human infection in DF. Thus, it is essential to continue entomological surveillance, intensifying it in the rainy season and in regions of greater occurrence.
INTRODUCTION: Entomological surveillance of Chagas disease in the Federal District of Brazil (DF), has recorded the following triatomine species: Panstrongylus megistus, P. geniculatus, P. diasi, Rhodnius neglectus, Triatoma pseudomaculata, and T. sordida. We aimed to analyze the spatial and temporal occurrence of triatomine species collected in DF, and their indices of natural infection with trypanosomes. METHODS: The Health State Secretariat of DF recorded triatomines between 2002 and 2010 in 20 administrative regions. This retrospective analysis considered the number of adults and nymphs of each species collected and infected in both intradomicile and peridomicile. RESULTS: A total of 754 triatomines were collected in 252 reported domiciles. Panstrongylus megistus was the most frequent species (65%), followed by T. pseudomaculata (14%). Of the 309 examined insects, only 3 (1%) specimens of P. megistus were infected with flagellates morphologically similar to Trypanosoma cruzi. The spatial occurrence indicated a higher diversity of triatomines and frequency of T. sordida in rural areas. Moreover, there was a predominance of P. megistus in urban areas. The number of records of P. megistus in the rainy season was two times higher than that during the dry season. The largest number of triatomines was collected in November. CONCLUSIONS: The presence of P. megistus specimens infected with trypanosomes in domiciles, shows the potential risk of humaninfection in DF. Thus, it is essential to continue entomological surveillance, intensifying it in the rainy season and in regions of greater occurrence.
Authors: Raíssa N Brito; David E Gorla; Liléia Diotaiuti; Anália C F Gomes; Rita C M Souza; Fernando Abad-Franch Journal: PLoS Negl Trop Dis Date: 2017-11-16
Authors: Walter Ceretti-Junior; Daniel Pagotto Vendrami; Marco Otavio de Matos-Junior; Aline Rimoldi-Ribeiro; Julia Vono Alvarez; Sandro Marques; Agnaldo Nepomuceno Duarte; Rubens Antonio da Silva; João Aristeu da Rosa; Mauro Toledo Marrelli Journal: Rev Inst Med Trop Sao Paulo Date: 2018-07-19 Impact factor: 1.846
Authors: João Victor Leite Dias; Dimas Ramon Mota Queiroz; Helen Rodrigues Martins; David Eladio Gorla; Herton Helder Rocha Pires; Liléia Diotaiuti Journal: Mem Inst Oswaldo Cruz Date: 2016-01 Impact factor: 2.743
Authors: Cláudia M Melo; Ana Carla F G Cruz; Antônio Fernando V A Lima; Luan R Silva; Rubens R Madi; Veronica de Lourdes S Jeraldo; Ruben Mercado Journal: Can J Infect Dis Med Microbiol Date: 2018-10-01 Impact factor: 2.471