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During two periods (December 1985-October 1986 and October 1990-April 1991), the digestive tracts of 102 sheep and 29 goats were examined, with the purpose to find out and identify the helminthes parasites of these animals. The 96,1% of sheep and 93,1% of goats were found to be infected with 26 and 20 different helminths, respectively. The nematodes which were found out of the different parts of the digestive tract of these animals were: Sheep: oesophagus: Gongylonema pulchrum, abomasum: Haemonchus contortus, Teladorsagia circumcincta, T. trifurcata, Trichostrongylus axei and Cooperia oncophora, small intestine: Teladorsagia circumcincta, Trichostrongylus colubriformis} T. vitrinus, T. capricola, Cooperia oncophora, C. curticei, Nematodirus filicollis, N. helvetianus, N. spathiger, N. battus, Bunostomum trigonocephalum and Strongyloides papillosus, large intestine: Oesophagostomum venulosum, Oe. columbianum, Chabertia ovina, Trichuris globulosa, T. ovis and Skrjabinema ovis. Goats: all the previous findings except T. vitrinus, Nematodirus helvetianus, N. battus and Trichuris ovis. The cestodes parasites, Moniezia expansa, Moniezia benedni, Avitellina centripunctata and Stilesia globipunctata were found into the small intestine of sheep and, Moniezia expansa and Avitellina centripunctata, in goats only. All animals were infected with more than one different parasites. The sheep nematodes Cooperia curticei, Nematodirus helvetianus, and N. spathiger, were identified for the first time in Greece, more over, Nematodirus battus were found out and identified for the first time in Greece.

Blood 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 Macedonia-Greece. The purpose of this survey was to find out the infected dogs with filarial parasites. Ninety six (38,1%) out of the examined dogs were found to be infected with one or more parasitic species. The 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. Mixed 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. The microfilarial burden per ml of the infected dogs fluctuated between 85 and 7.375. There 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.

Total protein, serum albumin, serum iron and haematocrit of 21 mixed breed female sheep were examined in order to clarify the pathogenicity of Dicrocoelium dendriticum in these animals. The animals were placed individually in metabolic cages and divided into three groups depending on the presence of the worm burden, after their slaughtering and liver examination. The first one was composed of six animals with high D. dendriticum burden (4.800-8.180 parasites), the second of seven with a moderate burden (400-2.720 parasites) and the third which was composed of eight animals, was the control and its worm burden ranged between 0 and 37 parasites. In the begining of the experiment, all sheep were treated, with anthelmintic drugs and an insecticide against cestode and nematode parasites and ectoparasites. Additionally, the control group was treated with a drug against D. dendriticum. All sheep were free of Fasciola hepatica and lung nematodes. During the study, three blood samplings were taken for total protein,serum albumin and serum iron and every day for haematocrit. The first blood sampling was taken the same day with the anthelmintic treatment and the other two, three and four weeks later. There were no statistically significant differences when the group mean values were compared either between the different dates of sampling in the same group or between the different groups,with the exception of serum albumin in the highly infected group, which appeared to be improved in the 2nd and 3rd blood examinations. Finalty, according to the not significant changes in the blood figures, in combination with the other radioisotopic  measurments, which took place earlier, is concluded, that D. dendriticum, appart from local lesions, does not seem to infuence the animal health in general.