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Ethanol Extracts of Various Helminths in a Complement Fixation Test for Eosinophilic Lung (Tropical Eosinophilia)^*

Sera taken fortnightly from fourteen patients with eosinophilic lung (tropical eosinophilia) were tested by complement fixation with ethanol extracts of Dirofilaria immitis, Ascaris lumbricoides, Toxocara canis, Gnathostoma procyonis, Fasciola gigantica and Dipylidium caninum. Initially, sera from ten patients had high antibody titers with each of the extracts while antibodies were not detected in sera from the other four; after treatment with diethylcarbamazine the high titers decreased. It is concluded that the reactions obtained with these various extracts do not indicate infection with any particular helminth.

^* This study was conducted under the sponsorship of the Commission on Parasitic Diseases, Armed Forces Epidemiological Board and supported by the Office of the Surgeon General, Department of the Army.