| [helminth infection in cattle from schleswig-holstein (germany) after one grazing season]. | fifteen holstein-friesian bulls which grazed together for one season (april to november) in schleswig-holstein were necropsied after housing for 2 to 6 weeks. the approximately 12-month old bulls weighed 378 to 491 kg at slaughter and did not receive any anthelmintic on pasture. the most prevalent species of the gastrointestinal tract was ostertagia ostertagi (prevalence; geometric mean worm count; minimum-maximum) (100%; 1,355; 130-4,590) followed by cooperia (c.) oncophora (86.7%; 343; 20-14,8 ... | 2003 | 12592928 |