med vet

Pesq. Vet. Bras. 31(5):374-378, maio 2011

Surto de ceratoconjuntivite infecciosa bovina e hemoncose causando mortalidade em bezerros1
Priscila M.S. Carmo2, Agueda C. Vargas3, Daniel R. Rissi2, José C.
Oliveira-Filho2, Felipe Pierezan2, Ricardo B. Lucena2, Fernando L.
Leivas Leite3 e Claudio S.L. Barros4*
ABSTRACT.- Carmo P.M.S., Vargas A.C, Rissi D.R., Oliveira-Filho J.C., Pierezan F.,
Lucena R.B., Leivas Leite F.L. & Barros C.S.L. 2011. [Outbreak of infectious bovine keratoconjunctivitis and haemonchosis causing moratality in calves.] Surto de ceraconjuntivite infecciosa bovina e hemoncose causando mortalidade em bezerros. Pesquisa Veterinária Brasileira 31(5):374-378. Departamento de Patologia, Universidade Federal de Santa Maria, Avenida Roraima 1000, Camobi, Santa Maria, RS 97105-900, Brazil.
E-mail: [e-mail]
An outbreak of infectious bovine keratoconjunctivitis (IBK) with concomitant haemonchosis is described affecting a group of 116 yearling calves in southern Brazil.
Twenty calves were affected and nine died. Clinical signs included wasting, marked oral mucosal pallor, serous ocular discharge, focal central corneal opacity, and reddening of the conjunctiva. More advanced stages displayed copious serous ocular discharge, corneal opacity, keratoconus, keratomalacia, and blindness. The diagnosis of IBK was based on the epidemiological, clinical, and pathological findings and confirmed by bacteriologic culture of a hemolytic strain of Moraxella bovis from the eye globe of two affected calves. The high lethality rate (45%) in this outbreak was caused by concomitant and severe haemonchosis. INDEX TERMS: Diseases of cattle, conjunctivitis, bovine infectious keratoconjunctivitis, Moraxella bovis. RESUMO.- É descrito um surto de ceratoconjuntivite infecciosa bovina (CIB) e hemoncose intercorrente afetando um grupo de 116 bezerros de 1-2 anos de idade na região central do Rio Grande do Sul. Vinte bezerros foram afetados e