Article Text

Download PDFPDF
Infectious bovine rhinotracheitis and pneumonia in housed bullocks

Statistics from Altmetric.com

Northern ireland disease surveillance headlines, January to March 2020

  • Infectious bovine rhinotracheitis in youngstock

  • Septic pulmonary thromboembolism in a heifer

  • Postinjection myositis in lambs

  • Periodontitis in ewes

  • Angiostrongylosis in a fox

Cattle

Respiratory diseases

Respiratory disease was identified in 61 cattle postmortem submissions between January and March 2020. The most common pathogens identified included Mycoplasma bovis (16 cases), Mannheimia haemolytica (15 cases), Pasteurella multocida (10 cases), Histophilus somni (five cases), bovine respiratory syncytial virus (four cases) and Trueperella pyogenes (four cases).

Infectious bovine rhinotracheitis

Severe tracheitis due to infectious bovine rhinotracheitis and secondary pneumonia due to P multocida infection were diagnosed in a 12-month-old bullock, one of four to die out of a group of 30 being kept indoors on silage.

On gross examination there was consolidation of the cranial lobes of the lung with around 20 per cent of the lung field being affected. The remaining parenchyma was oedematous with fibrin exudation into the interlobular septae.

Histological examination of the lung showed acute/subacute bronchointerstitial pneumonia with the lesions centered on the bronchioles. There was marked bronchitis and bronchiolitis with epithelial necrosis, pseudodiphtheritic membrane formation and the presence of large amounts of inflammatory exudate in the airways. Cellular infiltrates were predominantly mononuclear and were present in the bronchiolar submucosa and adjacent alveolar walls.

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.

Bovine herpesvirus type 1 (BHV-1) antigen was detected in lung by immunofluorescence and BHV-1 nucleic acid was detected in lung tissue by rt-PCR.

Fibrinonecrotic bronchopneumonia due to M haemolytica A1 infection was diagnosed on full postmortem examination of a one-year-old bullock, …

View Full Text

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.