| prevalence of sucking and chewing lice on cattle entering feedlots in southern alberta. | beef calves from 2 sources entering southern alberta feedlots in the winters of 1997-98 and 1998-99, were surveyed for the presence of lice. a random sample of multiple source (ms), that is, auction market-derived, calves entering commercial feedlots and single source (ss) calves entering a backgrounding feedlot were examined for the presence of lice at entry to the feedlot. a standardized examination, which involved hair-part examination of 8 louse predilection sites, was conducted on each sele ... | 2001 | 11326630 |