Toxoplasma gondii in the peripheral blood of patients with acute and chronic toxoplasmosis

Toxoplasma gondii in the peripheral blood of patients with acute and chronic toxoplasmosis

Author Silveira, Claudio Autor UNIFESP Google Scholar
Vallochi, Adriana Lima Google Scholar
Silva, Ulisses Rodrigues da Google Scholar
Muccioli, Cristina Autor UNIFESP Google Scholar
Holland, Gary N. Google Scholar
Nussenblatt, Robert B. Google Scholar
Belfort, Rubens Autor UNIFESP Google Scholar
Rizzo, Luiz Vicente Google Scholar
Institution Hosp Israelita Albert Einstein
Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Univ Calif Los Angeles
Albert Einstein Jewish Inst Educ & Res
Brazilian Minist Sci & Technol
Abstract Background and aims Toxoplasmic retinochoroiditis may recur months or years after the primary infection. Rupture of dormant cysts in the retina is the accepted hypothesis to explain recurrence. Here, the authors present evidence supporting the presence of Toxoplasma gondii in the peripheral blood of immunocompetent patients.Methods Direct observation by light microscopy and by immunofluorescence assay was performed, and results were confirmed by PCR amplification of parasite DNA.Results the authors studied 20 patients from Erechim, Brazil, including acute infected patients, patients with recurrent active toxoplasmic retinochoroiditis, patients with old toxoplasmic retinal scars, and patients with circulating IgG antibodies against T gondii and absence of ocular lesions. Blood samples were analysed, and T gondii was found in the blood of acutely and chronically infected patients regardless of toxoplasmic retinochoroiditis.Conclusions the results indicate that the parasite may circulate in the blood of immunocompetent individuals and that parasitaemia could be associated with the reactivation of the ocular disease.
Language English
Sponsor Fundacao de Amparo a Pesquisa de São Paulo
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Date 2011-03-01
Published in British Journal of Ophthalmology. London: Bmj Publishing Group, v. 95, n. 3, p. 396-400, 2011.
ISSN 0007-1161 (Sherpa/Romeo, impact factor)
Publisher Bmj Publishing Group
Extent 396-400
Access rights Closed access
Type Article
Web of Science ID WOS:000287440400019

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