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Disease surveillance in England and Wales, June 2019

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APHA disease Surveillance report headlines

  • Pestivirus infections in cattle

  • Copper toxicity in lambs

  • Combinations of pathogens in postweaned pigs with diarrhoea and wasting

  • Focal duodenal necrosis in layer chickens

  • Oral canker (trichomonosis) in a backyard chicken

Highlights from the scanning surveillance network

Cattle

Manifestations of pestivirus infections

Mucosal disease was diagnosed at the APHA Shrewsbury Veterinary Investigation Centre (VIC) on postmortem examination of a 20-month-old Holstein-Friesian heifer which was submitted from a 200-cow dairy herd. It was the second animal to die in a group of 60 pregnant heifers.

A large ulcer was present in the greater curvature of the abomasum (Fig 1). Dark brown fluid contents filled the abomasum and the intestines. Bovine viral diarrhoea virus (BVDV) type 1 was identified by PCR and immunohistochemistry on the brain confirmed labelling of BVDV which was characteristic of a persistently infected animal.

Fig 1: Ulcer in the abomasum of a heifer with mucosal disease

Two cases of suspected mucosal disease were also identified at the Starcross VIC. The first was a 17-month-old bullock with a history of sudden-onset bloody scour. The animal was in poor condition and had extensive ulceration of the nasal and oral mucosa.

The second case, in a separate herd, was a 20-month-old beef heifer with chronic weight loss which had recently developed severe watery diarrhoea. In both animals examination of blood samples using the BVD antigen ELISA was positive.

About this report

This report is produced each month by the APHA Surveillance Intelligence Unit and the six Species Expert Groups (livestock and wildlife). The international horizon-scanning summaries are produced by the Defra/APHA International Disease Monitoring (IDM) team, notifiable disease reports by the APHA Veterinary Exotic and Notifiable Disease Unit (VENDU), and threat analysis by the cross-agency Veterinary Risk Group (VRG). The report is drawn from scanning surveillance information, data and reports produced by the APHA Veterinary Investigation Centres and non-APHA partner postmortem examination providers contributing to the VIDA database and complying with standardised diagnostic and laboratory testing criteria. …

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