Endoparasites in a flock of Zerasca, an italian autochtonous breed of sheep

In this work the endo-parasites of Zerasca sheep, an autochthonous breed of Tuscany (Italy), were investigated for the first time. The evaluation of the zootechnical risks linked with these diseases and of the efficacy of control measures used in the examined flock represented other important aims. During a period of 15 months, individual faecal and blood samples were collected monthly from 45 animals. Blood samples were used to evaluate the Packed Cell Volume (PCV), while on faecal samples parasitological analysis were performed with flotation tests, a modified McMaster method and with sedimentation. Quantitative data of gastrointestinal nematodes (EPG) and coccidian (OPG) were statistically analyzed. Results obtained show the presence in the flock of coccidia, gastrointestinal and lung strongyles, whip-worms, cestodes (Moniezia benedeni) and flukes (Dicrocoelium dendriticum, Fasciola hepatica and Paramphistomidae). All these parasites can be responsible for negative effects on sheep productions. EPG number resulted highly influenced (P<0.01) by the date of sampling, while PCV and EPG values showed a negative correlation (P<0.01). Significant influence between OPG and data of sampling and age of animals (p<0.001) was also found. The use of collective pastures represents the main characteristic of the breeding of Zerasca sheep. Thus, in our opinion the use of common management practices are fundamental for an efficacious control of the endo-parasitic diseases in this autochthonous breed.