A combination of culling, ultrasound scanning and tighter biosecurity has cut cases of ovine pulmonary adenocarcinoma (OPA) by two-thirds on a Monmouthshire sheep farm. From a high of 11.6%, prevalence in the flock of 550 Texel cross Lleyns and Aberfields at Court Farm, Llanthony, near Abergavenny, is now at 4%. OPA was diagnosed in the […]
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