[Infectious bovine keratoconjunctivitis (IBK) in cows, clinical and lab review at four farms].

After several reports to the GD (Dutch Animal Health Service) from practitioners in The Netherlands concerning serious Infectious Bovine Keratoconjunctivitis (IBK) in dairy herds during summer and autumn 2003, the GD has carried out a pilot-study to determine the most responsible agent. This pilot was thought to be important because of the painfulness of the illness and problems like, (for the farmer) an intensive and difficult therapy. Also the report of a Chlamydophilae infection causing IBK in a dairy herd in the UK prompted to this study. The most frequently isolated infectious agent in our study was Moraxella, probably M. bovis. For the presence of Chlamydophila, mycoplasmata or BHV1 viruses were no indications.