This study was carried out throughout one year from January 2004 to December 2004 at Gharbia governorate, Egypt, to determine some epidemiological and clinical features concerning parasitic gastroenteritis in sheep. Moreover the efficacy of chicory against parasitic gastroenteritis was studied. Out of 325 native breed sheep examined, 233 animals proved to be infested with parasitic gastroenteritis representing an incidence rate of 71.69%. The highest infestation rate was recorded in mobile flocks among young age from 1 to 2 years during winter and autumn, whereas the susceptibility was not significantly affected by sex. Trichostrongylus spp., Strongyloides spp. and Trichuris spp. were recorded. Clinically, infested sheep showed signs of emaciation, diarrhea, poor growth rate, wool easily detached and pale mucous membrane. Necropsy finding of sheep infested with Haemonchosis revealed hyperemia, ulcers and petechial hemorrhages on infested abomasa. Whereas, histopathological examination revealed mononuclear cell infiltration in between mucosal glands and in the lamina propria in addition to necrosis and sloughing of mucosal epithelium. Chicory (Cichorium intybus) as green fodder had a good role in prevention of infestation with parasitic gastroenteritis, in addition it increase the live body weight gain.  Moreover, its extract in vitro, decreased hatchability and development of nematode eggs and reduced the viability of obtained larvae at low concentration while the high concentration lead to death of these larvae.