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SRUC VS disease Surveillance headlines, November 2019
Lymphoid leukaemia in a Charolais cross stirk.
Suspected salt poisoning/water deprivation in newly housed lambs.
Erysipelas septicaemia in piglets born to vaccinated gilts.
Valvular endocarditis leading to cardiac failure in an alpaca.
Focus on ovine Johne’s disease diagnoses in Scotland between 2005 and 2019.
November 2019 was a cold month with the mean temperature 1.4°C below the long-term average. It was unusually dry with only 62 per cent of average rainfall overall, but there was a marked regional split, with eastern areas cloudier and wetter than average, while the west was generally sunnier and much drier than usual.
Generalised and systemic conditions
A group of 125 homebred suckled calves were weaned, housed and introduced to a total mixed ration comprising grass silage, biscuit meal and barley. An intranasal respiratory virus vaccine and autogenous vaccines targeting Mycoplasma bovis and Pasteurellaceae were administered at this time.
A fortnight later two six-month-old animals developed acute respiratory signs and died within a five-day period. A further 10 calves were treated with antibiotics during this time.
Both carcases had evidence of lung consolidation, cranioventral in one and involving the entire right lung in the other, and fibrinous pericarditis at postmortem examination. A 1 to 2 cm diameter area of myocardial discolouration was found within the left ventricular papillary muscle of both.
About this report
This monthly summary is produced for Vet Record by Scotland’s Rural College Veterinary Services (SRUC VS) and is based on reports from its centres in Edinburgh, Perth, St Boswells, Ayr (Auchincruive), Dumfries, Aberdeen, Inverness and Thurso and in collaboration with the Moredun Research Institute.
SRUC VS monthly reports are available online at www.sruc.ac.uk/downloads/120613/monthly_reports from the first of every month.
Histophilus somni was cultured from the lung and heart of calf 2 but not calf 1; however, histopathology confirmed a leukocytoclastic and necrotising myocarditis with intralesional small bacilli. H …
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