[Filarial eosinophilic lung diseases, value of immunology (apropos of 9 cases)].

The study of nine cases of "eosinophilic lung" using specific immunological techniques indicates that the latter completes the geographical, clinical, radiological and hematological criteria of this syndrome. The search of circulating antibodies confirms the filarial etiology and individualises a remarkable immunological profile thus, suggesting a diagnosis in the case of occult filariases. The intensity of the immunological reactions brings a supplementary argument in favor of the hypothesis of a poor host-parasite relationship in the pathogeny of secondary manifestations to an infestation by W. bancrofti, B. malayi and other animal filariae such as B. pahangi.