| a randomized and blinded field trial to assess the efficacy of an autogenous vaccine to prevent naturally occurring infectious bovine keratoconjunctivis (ibk) in beef calves. | a randomized and blinded 2-arm parallel trial was conducted to assess the efficacy of an autogenous vaccine to prevent naturally occurring infectious bovine keratoconjunctivis (ibk) in beef calves. the trial was managed between may and november 2008 on university owned farms in iowa and wisconsin. the vaccine at iowa contained moraxella bovoculi (m. bovoculi) while the organism used in the wisconsin herds vaccine was branhemella ovis (b. ovis renamed m. ovis). calves born between january and may ... | 2009 | 19531391 |