In bovine and ovine-caprine cattle, Moraxella bovis is the most common cause of conjunctivitis, though in any case a differential and/or complementary diagnosis should be made with Chlamydia and Mycoplasma. Moreover, IBR virus should be considered in bovine cattle.
In order to prevent many of these cases it is possible to prepare autovaccines with the strains that have already been isolated in other seasons, or alternatively samples can be collected from the first cases detected in the present spring period.
Conjunctival swabs are to be sent to the laboratory (ideally 3-4 from various affected animals).
A review of the most interesting articles on keratoconjunctivitis published in the literature can be obtained in PubMed.