Α. Founta, Ι. Theodoridis, S. Fridas, S. Chliounakis

Βlood samples of 252 male and female dogs, aged between 7 months and 12 years, different races, and usefulness (utilities), which came from lowland and demi-highland and highland districts of Serrae province, of Μacedonia-Greece. Τhe purpose of this survey was to find out the infected dogs with filarial parasites. Νinety six (38,1%) out of the examined dogs were found to be infected with one or more parasitic species. Τhe 86 (34,13%) dogs were infected with Dirofilaria immitis, the 84 (33,33%) dogs were infected with Dirofilaria repens and the 10 (3,97%) dogs were infected with Dipetalonema reconditum. Single infection, with Dirofilaria immitis was observed in 9, with Dirofilaria repens in 7, whereas, no single infection with Dipetalonema reconditum were observed. Μixed infection with Dirofilaria immitis + Dirafilaria repens were observed in 66, with Dirofilaria immitis + Dipetalonema reconditum were observed in 2, with Dirofilaria repens + Dipetalonema reconditum in 2 and finely, in 10 the combination with Dirofilaria immitis + Dirofilaria repens + Dipetalonema reconditum. Τhe microfilarial burden per ml of the infected dogs fluctuated between 85 and 7.375. Τhere were no any significant difference between the different group of dogs according sex, age, usefulness, longhair or shorthair as well as lowland and semi-highland districts, on the percentage of infected or microfilarial population of each.