| monthly and seasonal fluctuations in abomasal nematode worm burden of naturally infected cattle in austria. | from october 1980 until september 1981, 191 abomasa of naturally infected cattle were obtained from the slaughter-houses of mürzhofen and graz in the province of styria, and of wiener neustadt in the province of lower austria and examined to study the monthly and seasonal occurrence of hypobiosis in ostertagia ostertagi and trichostrongylus axei. infections in pastured animals (cows, steers and heifers) were compared with those in stabled animals (bulls fed on green forage and silage). except fo ... | 1987 | 3564352 |