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Intestinal torsion diagnosed in dairy cattle from different herds in Northern Ireland

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Northern ireland disease surveillance headlines, April to June 2019

  • Malignant catarrhal fever in cattle

  • Mycoplasma bovis pneumonia in cattle

  • Torsion of the reticulum, omasum and abomasum in adult dairy cows

  • Jejunal haemorrhage syndrome in cattle

  • Blackleg and sarcocystosis in sheep

  • Cerebrocortical necrosis in sheep

  • Tick pyaemia in sheep

Cattle

Respiratory diseases

Respiratory disease was identified in 51 cattle postmortem submissions in Northern Ireland between April and June 2019. The most common pathogens identified included Mycoplasma bovis (12 cases), Mannheimia haemolytica (10 cases), Pasteurella multocida (four cases), Trueperella pyogenes (four cases), malignant catarrhal fever (MCF) (four cases), Haemophilus somni (three cases), and respiratory syncytial virus (three cases).

Malignant catarrhal fever

Pneumonia and diphtheritic tracheitis associated with ovine herpesvirus type 1 (OHV-1) infection were diagnosed in two cases during the second quarter of 2019. In both cases it was noted that the clinical presentation and gross postmortem findings were not typical. Histological examination however showed widespread vasculitis consistent with MCF. The animals were serologically positive and OHV-1 nucleic acid was detected by RT-PCR in lymphoid tissue.

Histopathology was especially marked in the brain and kidney. In the brain there was marked lymphocytic vasculitis with perivascular oedema and occasional perivascular haemorrhage affecting all regions; mild lymphocytic meningitis with meningeal oedema was present. In the kidney there was mild disseminated interstitial nephritis with a poorly defined perivascular distribution and pale eosinophilic homogenous material was present in the urinary spaces of renal corpuscles.

About this report

This summary has been compiled by the Veterinary Sciences Division of the Agri-Food and Biosciences Institute of Northern Ireland (AFBI), and is based on diagnostic submissions to the AFBI’s veterinary laboratories at Stormont, Belfast and Omagh, County Tyrone. The AFBI operates a farm animal disease surveillance service on behalf of the Department of Agriculture, Environment and Rural Affairs in Northern Ireland.

Atypical interstitial pneumonia

Atypical interstitial pneumonia was diagnosed in two four-month-old calves from the same herd which were presented …

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