Dynamics of Panstrongylus megistus infestation, the primary vector of Trypanosoma cruzi in Minas Gerais, Brazil

Ferreira, Flávio Campos; Diotaiuti, Liléia; Belisário, Carlota Josefovicz

doi:10.1016/j.actatropica.2022.106658

Cited by 1 publication

(2 citation statements)

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“…Analyses carried out in the PAMA, RS, show that the species tends to invade households, but rarely forms colonies. This was mainly observed in wood and/or brick houses located in wooded areas, where the insects found appropriate conditions to invade and form colonies since they had shelter and food sources, such as opossums, poultry and rodents, which was confirmed by other studies 14 , 15 . The data also confirm the analysis conducted by the PCDCh-DATASUS in RS by Bedin et al 16 , i.e., the 1996-2008 historical series had already shown the important dispersion of P. megistus in the state and that 88% of P. megistus specimens were captured intradomicile.…”

Section: Discussionsupporting

confidence: 74%

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Occurrence and distribution of Panstrongylus megistus (Burmeister, 1835) (Hemiptera, Reduviidae) in a metropolitan area of Southern Brazil

Mello

Souza

Bedin

et al. 2023

Rev. Inst. Med. trop. S. Paulo

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Two triatomine genera ( Panstrongylus and Triatoma ) have essentially been recorded in Rio Grande do Sul State, Brazil. Panstrongylus megistus should be highlighted since this species is one of the main vectors of Trypanosoma cruzi in Brazil, due to its wide geographical distribution and the high susceptibility to this protozoan. This study aimed to present not only the occurrence and distribution of P. megistus in the Porto Alegre city’s metropolitan area (PAMA), Rio Grande do Sul State, Brazil, but also the rates of T. cruzi infection, from 2009 to 2020. The PAMA, which comprises 34 cities and 4.4 million habitants, extends across the transition area in two biomes – Pampa and Mata Atlantica – found in the state. Results showed that P. megistus was recorded in 76.5% of cities (i.e., 26 out of 34), mainly in Porto Alegre city, where the vector was found in 11 out of the 12 years that were monitored. Three hundred and nineteen specimens were captured. Two hundred and sixty-seven specimens (83.7%) were located intradomicile (p < 0.0001), while 52.3% positivity for T. cruzi was found. Thus, P. megistus is important in the PAMA, because it invades and colonizes the households. Moreover, the high rates of T. cruzi infection have drawn attention.

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Section: Discussionsupporting

confidence: 74%

“…Active search must be the answer given by surveillance to find triatomines. Passive surveillance, which requires community participation, is the best methodology to find triatomines 15 .…”

Section: Discussionmentioning

confidence: 99%