Pneumonia caused by the bacterium Mannheimia haemolytica, sometimes knowsas 'pasteurella pneumonia, is the most common sheep respiratory disease in Great Britain, according to samples submitted to the veterinary surveillance network in 2017.This is primarily a pneumonia seen in lambs but, of the samples submitted in 2017, 28% were diagnosed in pre-weaned lambs (mainly during May and June), 24% in post-weaned lambs (frequently store lambs in the autumn) and 27% in adult sheep.
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