Trypanosoma cruzi: mixture of two populations can modify virulence and tissue tropism in rat.

Abstract:

:In rats, CL-Brener clone caused high mortality, severe acute myocarditis, and myositis that subsided completely in surviving animals. Accordingly, no parasite kDNA could be amplified in several organs after 4 months. The monoclonal JG strain caused null mortality, acute predominantly focal myocarditis, discrete and focal myositis, and a chronic phase with sparse inflammatory foci. Double infection with both Trypanosoma cruzi populations turned mortality very low or null. At the end of the acute phase, the heart exhibited only JG strain kDNA (LSSP-PCR), while skeletal muscles and rectum exhibited only CL-Brener kDNA. Molecular and histopathological findings were accordant. In double infection chronic phase, JG strain remains in heart and appeared in organs previously parasitized by CL-Brener clone. Understanding the virulence and histotropism shifts now described could be important to clarify the variable clinical course and epidemiological peculiarities of Chagas' disease.

journal_name

Exp Parasitol

authors

Franco DJ,Vago AR,Chiari E,Meira FC,Galvão LM,Machado CR

doi

10.1016/s0014-4894(03)00119-x

keywords:

subject

Has Abstract

pub_date

2003-05-01 00:00:00

pages

54-61

issue

1-2

eissn

0014-4894

issn

1090-2449

pii

S001448940300119X

journal_volume

104

pub_type

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