Citologia do escarro induzido em asmáticos infectados pelo Schistosoma mansoni
Induced sputum cytology in asthmatics infected with Schistosoma mansoni
Givaneide S. Lima; Maria Ilma Araújo; Maria Cecília F. Almeida; Alvaro A. Cruz; Luciana S. Cardoso
Resumo
Introdução: A infecção pelo Schistosoma mansoni inibe manifestação da asma. A avaliação do escarro induzido em pacientes infectados pelo parasita pode trazer informações importantes sobre a relação entre doenças alérgicas e parasitoses. Objetivo: Avaliar a celularidade do escarro em asmáticos em uma área endêmica em esquistossomose na Bahia. Métodos: Estudo randomizado, duplo cego, controlado com placebo, incluindo asmáticos infectados pelo S. mansoni e um grupo de asmáticos não infectados. Foi utilizada a celularidade do escarro induzido, em contagens sequenciais pré (D0) e pós-tratamento (D7, D60 e D90), para avaliar os efeitos do tratamento da parasitose com praziquantel sobre a asma. Resultados: Avaliados 22 indivíduos asmáticos infectados pelo S. mansoni e grupo controle adicional composto por oito asmáticos não infectados. O grupo que usou praziquantel não diferiu do grupo placebo quando comparada a celularidade do escarro. Houve aumento no número de eosinófilos nos D7, D60 e D90 no grupo placebo, quando comparados ao basal, e no D60 no grupo praziquantel. O número total de células aumentou em relação ao basal no D7 e no D90 para o grupo placebo, e no D90 para o grupo praziquantel. O grupo que usou praziquantel apresentou uma redução do volume expiratório forçado no 1º segundo (VEF1) no D7, D60 e D90. Não houve associação entre a eosinofilia e a gravidade da asma. Conclusão: No presente estudo não foi encontrada correlação entre os tipos celulares encontrados e a gravidade da asma, nem houve variação significativa do percentual de eosinófilos em resposta ao tratamento da esquistossomose.
Palavras-chave
Abstract
Introduction: Schistosoma mansoni infection inhibits asthma symptoms. Assessment of induced sputum in infected patients may shed light on the relationship between allergic diseases and parasite infections. Objective: To assess the cellularity of induced sputum in asthmatic patients living in an endemic area of schistosomiasis in the Brazilian state Bahia. Methods: This randomized, double blind, placebo-controlled study included asthmatic patients infected with S. mansoni and a group of non-infected asthmatics (controls). Cellularity of induced sputum was analyzed based on cell counts before (D0) and after treatment (D7, D60, and D90), to evaluate the effects of treatment with praziquantel on asthma. Results: A total of 22 asthmatics infected with S. mansoni and 8 controls were assessed. Induced sputum cellularity in the group treated with praziquantel did not differ from that of the group treated with placebo. However, compared to baseline counts, a higher number of eosinophils was found in the placebo group on D7, D60, and D90, and on D60 in the treatment group. Total cell counts increased from baseline to D7 and D90 in the placebo group, and from baseline to D90 in the treatment group. Moreover, the treatment group showed a reduction in forced expiratory volume in 1 second (FEV1) on D7, D60, and D90. There was no association between eosinophilia and asthma severity. Conclusion: In the present study, there was no correlation between asthma severity and the cell types found during cellularity assessment,
Keywords
Referências
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Submetido em:
20/05/2014
Aceito em:
09/05/2015
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