Accidental infection by Trypanosoma cruzi follow-up by the polymerase chain reaction: case report Infecção acidental pelo Trypanosoma cruzi acompanhada pela reação em cadeia da polimerase: relato de caso

We report a case of accidental infection by Trypanosoma cruzi in a 42-year-old female patient who presented an inoculation chagoma. Laboratory confirmation was based on examination of fresh blood, Giemsa-stained blood smear, immunoenzyme test (EIA-IgG), indirect immunofluorescence (IIF-IgM, IgG) and...

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Bibliographic Details
Published in:Revista do Instituto de Medicina Tropical de São Paulo
Main Authors: Andréa Tieko Kinoshita-Yanaga, Max Jean de Ornelas Toledo, Silvana Marques de Araújo, Berenice Pelizza Vier, Mônica Lúcia Gomes
Format: Article in Journal/Newspaper
Language:English
Published: Universidade de São Paulo (USP) 2009
Subjects:
PCR
Eia
Online Access:https://doi.org/10.1590/S0036-46652009000500011
https://doaj.org/article/820021e9be96458d9d72f496b71c1f7c
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Summary:We report a case of accidental infection by Trypanosoma cruzi in a 42-year-old female patient who presented an inoculation chagoma. Laboratory confirmation was based on examination of fresh blood, Giemsa-stained blood smear, immunoenzyme test (EIA-IgG), indirect immunofluorescence (IIF-IgM, IgG) and polymerase chain reaction (PCR). Only the PCR gave a positive result, and the EIA test was inconclusive. Two treatments with benznidazole were necessary. PCR was the only technique that continued to give positive results for approximately two months (65 days, or 2.2 months) following the second treatment and negative results from 96 days (3.2 months) to 850 days (28.3 months). We concluded that the presence of an inoculation chagoma and use of PCR were important and decisive for diagnosis and follow-up of the case. Reportamos caso de infecção acidental pelo Trypanosoma cruzi em paciente do gênero feminino, 42 anos, que apresentou chagoma de inoculação. A confirmação laboratorial foi realizada pelo exame de sangue a fresco, esfregaço corado com Giemsa, imunoenzimaensaio (ELISA-IgG), imunofluorescência indireta (IFI-IgM, IgG) e reação em cadeia da polimerase (PCR). Somente a PCR foi positiva e a ELISA foi inconclusiva. Dois tratamentos com benznidazol foram necessários. PCR foi a única técnica que permaneceu positiva por aproximadamente dois meses (65 dias ou 2,2 meses) após o segundo tratamento e negativa de 96 dias (3,2 meses) a 850 dias (28,3 meses). Concluimos que a presença do chagoma de inoculação e o uso da PCR foram importantes e decisivos para o diagnóstico e o acompanhamento do caso.