Zoonotic filaria of possible American origin in Italy.

From a 31 year old man, resident in Monfalcone (Venezia Giulia) a nodule in the right temporal region was surgically removed in January 1992 containing a filiform living nematode. On the basis of the morphological characters, the nematode proved to be Dirofilaria sp. subgenus Nochtiella but the exact species was not possible to define. The medical history indicated that the patient had spent the last summer in Florida.