Diagnosing visceral leishmaniasis and HIV/AIDS co-infection: a case series study in Pernambuco, Brazil / Diagnosticando co-infecção leishmaniose visceral e HIV/AIDS: uma série de casos em Pernambuco, Brasil

ABSTRACT

HIV/AIDS-associated visceral leishmaniasis may display the characteristics of an aggressive disease or without specific symptoms at all, thus making diagnosis difficult. The present study describes the results of diagnostic tests applied to a series of suspected VL cases in HIV-infected/AIDS patients admitted in referral hospitals in Pernambuco, Brazil. From a total of 14 eligible patients with cytopenias and/or fever of an unknown etiology, and indication of bone marrow aspirate, 10 patients were selected for inclusion in the study. Diagnosis was confirmed by the following examinations: Leishmania detection in bone marrow aspirate, direct agglutination test, indirect immunofluorescence, rK39 dipstick test, polymerase chain reaction and latex agglutination test. Five out of the ten patients were diagnosed with co-infection. A positive direct agglutination test was recorded for all five co-infected patients, the Leishmania detection and latex agglutination tests were positive in four patients, the rK39 dipstick test in three, the indirect immunofluorescence in two and a positive polymerase chain reaction was recorded for one patient. This series of cases was the first to be conducted in Brazil using this set of tests in order to detect co-infection. However, no consensus has thus far been reached regarding the most appropriate examination for the screening and monitoring of this group of patients.

RESUMO

A associação da leishmaniose visceral com o HIV/AIDS pode se manifestar com características de doença agressiva ou sem sintomas específicos, dificultando o diagnóstico. Este artigo descreve o resultado de testes diagnósticos aplicados a uma série de casos suspeitos de leishmaniose visceral em pacientes com HIV/AIDS internados em hospitais de referência de Pernambuco, Brasil. De 14 pacientes elegíveis com citopenias e/ou febre de etiologia indefinida, com indicações de mielograma, foram incluídos dez. Para o diagnóstico, foram empregados os seguintes exames: pesquisa de Leishmania em aspirado de medula óssea, DAT, IFI, rK39, PCR e a KAtex. Cinco dos dez pacientes foram diagnosticados com co-infecção. Entre os cinco co-infectados, o DAT foi positivo em todos, a pesquisa de Leishmania foi positiva em quatro, assim como o KAtex, o rK39 em três, a IFI em dois e a PCR positiva em apenas um. Esta série de casos foi a primeira realizada no Brasil utilizando esse conjunto de exames para detecção de co-infecção, no entanto, ainda não há consenso quanto aos exames mais adequados a serem aplicados para screening e acompanhamento desse grupo de pacientes.