| abomasal parasitism in dairy cows in belgium. | over a period of one year, from march 1984 to april 1985, the abomasa of 157 dairy cows in east flanders (belgium) were collected and examined for the presence of nematodes. faeces and blood were also collected from the animals. no worms were recovered from 18 cows (11.5%), 118 cows (75%) had a low to moderate worm burden (10-10,000) and 21 cows (13.5%) a high worm burden (greater than 10,000). the geometric mean total number was 2171. ostertagia ostertagi and trichostrongylus axei were the main ... | 1986 | 3564332 |