| prevalence of dirofilaria immitis and dipetalonema reconditum infection in dogs: 805 cases (1980-1989). | clinical records of 6,977 dogs examined at the small animal clinic of the university of tennessee college of veterinary medicine from january 1980 through december 1989 were analyzed to determine the prevalence and changing frequency of dirofilaria immitis and dipetalonema reconditum infection. using the knott's test on these dogs, 805 (11.54%) tested positive for microfilariae, with d immitis in 430 dogs (6.16%), and dip reconditum in 375 dogs (5.37%). statistical analysis confirmed that the pr ... | 1992 | 1612997 |