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Type: Artigo de periódico
Title: Survival In Vitro And Virulence Of Trypanosoma Cruzi In Açaí Pulp In Experimental Acute Chagas Disease
Author: Barbosa R.L.
Dias V.L.
Pereira K.S.
Schmidt F.L.
Franco R.M.B.
Guaraldo A.M.A.
Alves D.P.
Passos L.A.C.
Abstract: Chagas disease is a parasitic infection with high socioeconomic impact throughout Latin America. Although this severe, incurable disease can be transmitted by several routes, oral transmission is currently the most important route in the Amazon Basin. Açaípulp has nutritional properties and is popular throughout Brazil and abroad. However, this pulp has been associated with microepidemics of acute Chagas disease (ACD) in northern Brazil, where açaífruit is the main food supplement. In this study, we examined the in vitro survival and in vivo virulence of Trypanosoma cruzi Y strain in açaípulp. Aliquots of in natura açaípulp produced in Belém city in the northern Brazilian state of Paráwere mixed with 10 5 trypomastigotes. The samples were incubated at room temperature or at 4 or - 20°C for various periods, and the parasites were isolated by forced sieving. The resulting eluates were examined by microscopy, and the trypomastigotes were administered intraperitoneally, orally, or by gavage to immunodeficient mice (C.B-17-Prkdc scid/PasUnib) that had been pretreated with antibiotics. Parasitemia was quantified by the Brener method, and mortality was recorded daily. All routes of administration resulted in ACD. A 5-day delay in the onset of parasitemia occurred with oral administration. The survival and virulence of the parasites were unaffected by prior incubation at room temperature for 24 h, at 4°C for 144 h, and at -20°C for 26 h. These results indicate that T. cruzi can survive and retain its virulence in açaípulp under various conditions and that cooling and freezing are not suitable methods for preventing foodborne ACD. Copyright © International Association for Food Protection.
Rights: fechado
Identifier DOI: 10.4315/0362-028X.JFP-11-233
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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