Clinical Efficacy of and Immunologic Alterations Caused by Interferon g Therapy for Alveolar Echinococcosis

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Abstract
Alveolar echinococcosis (AE) is a rare and often fatal disease characterized by a tumorlike expansion of the metacestode Echinococcus multilocularis in the liver. Because of the severe side effects of therapy with benzimidazoles, we treated a patient with recombinant interferon γ at a dose of 250 μg over a 3-day period once a month. Disease progression was not detected during the observed period of 18 months. Following stimulation with crude Echinococcus antigen, mRNA from interleukin 5 was still detected in peripheral blood mononuclear cells by means of reverse transcriptase polymerase chain reaction analysis, and expression of interleukin 10 in T lymphocytes (as measured by fluorescence-associated cell sorting of intracellular cytokines) was elevated. These results indicate that bolus therapy with interferon γ has some clinical effect but does not result in a change in the T helper 2 lymphocyte-dominated immune response to this parasite.

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