Abstract
Five outbreaks of infectious bovine keratoconjunctivitis were examined for bacteria and mycoplasmas. Mycoplasma bovoculi was demonstrated in four of the five outbreaks. Other mycoplasmatales were represented by Ureaplasma in one sample. Moraxella bovis and Neisseria ovis were found in all the outbreaks, the former being present in the vast majority of the animals. Transmission experiments with Mycoplasma bovoculi and Moraxella bovis in combination were carried out on four young, colostrumdeprived calves. Mycoplasma bovoculi appeared to have an enhancing effect on the pathogenicity of Moraxella bovis.
Keywords: infectious bovine keratoconjunctivitis, Mycoplasma bovoculi, Moraxella bovis
Sammendrag
Fem udbrud af infektiøs bovin keratokonjunctivitis blev undersøgt for forekomst af bakterier og mykoplasmer. Mycoplasma bovoculi blev påvist i 4 af udbruddene. Af andre mykoplasmer fandtes ureaplasma i én prøve. Moraxella bovis og Neisseria ovis isoleredes fra samtlige udbrud og Morexella bovis fra næsten alle undersøgte dyr. Forsøg på reproduktion af lidelsen blev udført som kombineret podning med Mycoplasma bovoculi og Morexella bovis på 4 kalve, der ikke havde fået kolostrum. Resultaterne kunne tyde på, at Mycoplasma bovoculi har en forstærkende effekt på patogeniteten af Morexella bovis.
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