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Updated: Jul 27, 2026

A Genetic Screen to Isolate Toxoplasma gondii Host-cell Egress Mutants
Published on: February 8, 2012
Lack of technical specificity in the molecular diagnosis of toxoplasmosis
Alicia Kompalic-Cristo1, Susie Andries Nogueira, Ana Lúcia Guedes
1Instituto Oswaldo Cruz, Laboratório de Doenças Parasitarias, Departamento de Medicina Tropical, Av. Brazil 4365, 21045-900-Manguinhos, Rio de Janeiro, Brazil.
Abstract:
The polymerase chain reaction amplification of a fragment of the B1 gene of Toxoplasma gondii coupled to hybridization was performed in 42 patients from Rio de Janeiro, Brazil. The results showed 50% of positivity in the IgM positive toxoplasmosis group, and 12.5% in the positive IgG and negative IgM individuals. The data presented here revealed a lack of specificity of the molecular approach, clearly indicating that the primers used may co-amplify human sequences.
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