Abstract
An immunoglobulin M (IgM) antibody capture enzyme immunoassay (MAC-ELISA) of sera from 153 patients with acute febrile diseases of unknown origin verified 60 cases of infections imported from tropical and subtropical countries to Russia, including 46 cases of dengue fever, 8 cases of Chikungunya fever, 4 cases of West Nile fever, and 2 cases of Neapolitan mosquito fever. The cases of dengue fever were associated with a visit to Indonesia (n = 22), Thailand (n = 11), Vietnam (n = 3), India (n = 3), Venezuela (n = 2), Singapore (n = 1), Sri Lanka (n = 1), Malaysia (n = 1), Costa Rica (n = 1), and Dominican Republic (n = 1). Seven dengue fever patients who had returned from Indonesia (n = 5), Thailand (n = 1), and Costa Rica (n = 1) were observed to have hemorrhagic syndrome. The patients with Chikungunya fever returned after a journey to the Maldive Islands (n = 2), Reunion Island (n = 1), India (n = 1), Indonesia (n = 2), and Singapore (n = 1). West Nile fever infection occurred in India (n = 1), Indonesia (n = 1), Costa Rica (n = 1), and Venezuela (n = 1) and mosquito fever cases were registered in the Malta and Majorca islands.
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