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Refractory and/or Relapsing Cryptococcosis Associated with Acquired Immune Deficiency Syndrome: Clinical Features, Genotype, and Virulence Factors of Cryptococcus spp. Isolates

Erika NascimentoDepartment of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil

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Lucia H. VitaliDepartment of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil

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Ludmilla TonaniDepartment of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil

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Marcia R. Von Zeska KressDepartment of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil

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Osvaldo M. TakayanaguiDepartment of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil

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Roberto MartinezDepartment of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil

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Refractory and relapsing crytocococcosis in acquired immune deficiency syndrome (AIDS) patients have a poor prognosis. The risk factors for this complicated infection course were evaluated by comparing refractory and/or relapsing cryptococcosis in human immunodeficiency virus–coinfected patients (cohort 1) with another group of AIDS patients who adequately responded to antifungals (cohort 2). Except for one isolate of Cryptococcus gattii from a cohort 2 case, all other isolates were identified as Cryptococcus neoformans var. grubii, sex type α, genotype VNI, including Cryptococcus reisolated from the relapse or in the refractory state. No differences were observed with respect to Cryptococcus capsule size and in the melanin and phospholipase production. The cohort 1 patients presented higher prevalence of cryptococcemia, cerebral dissemination, chronic liver disease, and leucopenia, and have increased death rate. Apparently, the refractory and/or relapsing cryptococcosis in the AIDS patients were more related to the host and the extent of the infection than to the fungal characteristics.

Author Notes

* Address correspondence to Erika Nascimento, Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes, 3900, CEP 14049-900, Ribeirão Preto, São Paulo, Brazil. E-mail: erika.nascimento@gmail.com

Financial support: Erika Nascimento was the recipient of a fellowship from Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) for the execution of this study (Protocol FAPESP 2010/51932-2).

Authors' addresses: Erika Nascimento and Lucia H. Vitali, Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil, E-mails: erika.nascimento@gmail.com and lucvitali@hotmail.com. Ludmilla Tonani and Marcia R. Von Zeska Kress, School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil, E-mails: ludtonani@hotmail.com and kress@fcfrp.usp.br. Osvaldo M. Takayanagui, Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo Brazil, E-mail: omtakay@fmrp.usp.br. Roberto Martinez, Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil, E-mail: rmartine@fmrp.usp.br.

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