Molecular bloodmeal analyses reveal that Trypanosoma cruzi -infected, native triatomine bugs often feed on humans in houses in central Brazil

Autor:	Rodrigo Gurgel-Gonçalves, Luciana Hagström, Nadjar Nitz, Mariana Hecht, Larissa Ribeiro Silva, Thaís Tâmara Castro Minuzzi-Souza
Rok vydání:	2018
Předmět:	0301 basic medicine Chagas disease animal structures General Veterinary biology fungi 030231 tropical medicine Zoology medicine.disease biology.organism_classification Hemiptera Tropidurus 03 medical and health sciences Panstrongylus geniculatus 030104 developmental biology 0302 clinical medicine Reduviidae Necromys Insect Science parasitic diseases medicine Parasitology Trypanosoma cruzi Triatominae Ecology Evolution Behavior and Systematics
Zdroj:	Medical and Veterinary Entomology. 32:504-508
ISSN:	0269-283X
DOI:	10.1111/mve.12324
Popis:	The identification of bloodmeal sources in triatomine bugs (Hemiptera: Reduviidae) is important in understanding vector-host associations and in measuring the risk for Chagas' disease transmission. The bloodmeal sources of triatomines infected with Trypanosoma cruzi (Trypanosomatida: Trypanosomatidae) caught in houses in central Brazil (Goias State and the Federal District) were investigated during 2012-2014. Mitochondrial cytochrome b amplicons were used to identify bloodmeals through high-resolution melting and DNA sequencing. Most bugs were found to have fed on either humans (45.7%) or chickens (43.1%). Human blood was detected in Triatoma sordida (n = 22/50 bugs), Triatoma pseudomaculata (n = 7/11 bugs), Panstrongylus megistus (n = 10/24 bugs), Panstrongylus geniculatus (n = 1/3 bugs) and Rhodnius neglectus (n = 18/28 bugs) (all: Hemiptera: Reduviidae). Sequencing identified Necromys (Rodentia: Cricetidae) mouse blood in P. geniculatus and Tropidurus (Squamata: Tropiduridae) lizard blood in T. pseudomaculata and T. sordida. These findings reveal new vector-host associations. The present results suggest frequent contact between humans and T. cruzi-infected triatomines in central Brazil and indicate that Chagas' disease transmission by native vectors is an ongoing threat.
Databáze:	OpenAIRE
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