| survey for heartworm, dirofilaria immitis, and dipetalonema reconditum (nematoda:filarioidea) in dogs from virginia and north carolina. | random-source dogs (n = 100) in virginia and north carolina were surveyed for the microfilariae of dirofilaria immitis. microscopic examination of fresh thin-films and modified knott preparations were made. dirofilaria immitis and dipetalonema reconditum were found in 19% and 6% of the animals, respectively. there was no animal that harbored both species. prevalence was significantly higher in north carolina (28.6%) than in virginia (13.6%) (p less than 0.025). mean pcv was significantly lower ( ... | 1982 | 7200339 |