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Northern Ireland Disease Surveillance Report
Northern Ireland disease surveillance, July to September 2012

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  • Abomasitis due to Candida albicans in a two-week-old calf

  • Copper poisoning in a three-month-old calf

  • Larval paramphistomosis in three- to four-month-old lambs

  • Fowl typhoid (due to Salmonella Gallinarium) in a batch of 40-week-old layers

  • Suspected closantel toxicosis in bongos

These are among matters discussed in the Northern Ireland animal disease surveillance quarterly report for July to September 2012

Cattle

Respiratory diseases

Respiratory disease was identified in 60 cattle postmortem submissions, between July and September 2012. The most common pathogens identified included Mannheimia haemolytica (11 cases), Dictyocaulus viviparus (nine cases), Trueperella (Arcanobacterium) pyogenes (five cases), Pasteurella multocida (five cases), Mycoplasma bovis (four cases), periparturient respiratory distress (three cases), Histophilus somni (one case) and bovine parainfluenza-3 virus (one case).

Nine cases of pneumonia due to D viviparus were diagnosed during the period. In late August, an adult cow was submitted from a herd at grass, with a history of coughing in adult cows. Vaccination against infectious bovine rhinotracheitis did not alleviate the signs and the cows were treated with a pour-on anthelmintic. Cows continued to exhibit respiratory distress after treatment and some were subsequently treated with antibiotics. Postmortem examination of a submitted carcase revealed Pasteurella-type pneumonia superimposed on a latent D viviparus infection. Further treatment of the herd with a pour-on product containing eprinomectin was reported to cause a marked clinical improvement.

Alimentary diseases

Bovine viral diarrhoea/mucosal disease

Of the 2450 blood samples that were tested for bovine viral diarrhoea virus (BVDV) by virus isolation or antigen capture ELISA, 206 (8.4 per cent) were positive. In addition, nine of 307 (2.9 per cent) submitted tissues and nasal mucus samples were positive by immunofluorescence. Three cases of mucosal disease were confirmed at postmortem examination during this period.

Neonatal enteritis

The pathogens identified in neonatal bovine faecal samples during the quarter are shown in Table 1. Overall, Cryptosporidium species and rotavirus were the …

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