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The Veterinary Record, Vol 138, Issue 14, 327-329
Copyright © 1996 by British Veterinary Association

Sulphur-induced polioencephalomalacia in lambs

J. C. Low BVSc, PhD, MRCVS1, F. Howie BVMS, MVM, MRCVS1, P. R. Scott DVM&S, DSHP, CertCHP, MRCVS2, M. Lewis BSc, PhD3, J. FitzSimons CDA, NDA3, and J. A. Spence BVM&S, DTVM, MRCVS4

1 Scottish Agricultural College Veterinary Services (Edinburgh), Bush Estate, Penicuik, Midlothian EH26 0QE
2 Large Animal Practice, Royal (Dick) School of Veterinary Studies, Department of Clinical Studies, Veterinary Field Station, Roslin, Midlothian EH25 9RG
3 Scottish Agricultural College, Genetics and Behavioural Sciences, Bush Estate, Penicuik, Midlothian EH26 9QE
4 Moredun Research Institute, 408 Gilmerton Road, Edinburgh EH17 7JH

An outbreak of polioencephalomalacia affected 16 of 46 Swaledale lambs and five of 25 Scottish blackface lambs 15 to 32 days after they were introduced to an ad libitum concentrate ration containing 0·43 per cent sulphur. The clinical signs were acute and included depression, central blindness and head-pressing, but no hyperaesthesia, nystagmus, dorsiflexion of the neck or opisthotonos were observed. Treatment of the affected lambs with vitamin B1, dexamethasone and antibiotics was associated with a prolonged recovery period, though no further cases were identified after vitamin B1 had been given parenterally to all the lambs at risk.






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Copyright © 1996 British Veterinary Association