| diagnosis of gastrointestinal nematodes infecting sheep in qalubia governorate by infective thrid stage larvae. | a total of 300 faecal samples obtained from living sheep in qalubia governorate, 128 (42.66%) harboured eggs of nematodes. the gastrointestinal nematodes had been differentiated through the infective third stage larvae. details of the general and differential categories of each were given. the recovered species were trichostrongylus axei, t. colubriformis, ostertagia circumcincta, haemonchus contortus, bunostomum trigonocephalum and oesophagostomum venulosum. | 1999 | 12561888 |