Dipartimento di Scienze della Produzione Animale, Università di Udine.
Blood samples from 407 bovines of "Azienda Marianis", a farm in Friuli Venezia Giulia, Italy, were examined for microfilariae; 143 (35.1%) were positive. A survey in other 23 farms of dairy cattle from 6 Communes of the Province of Udine revealed a prevalence of 11.28%. The prevalence was significantly correlated with the age of animals; in cow was lower than in young animals. Blood microfilariae (210) and adult females (15) were identified as Setaria labiatopapillosa.