Letter to the editor

Extract

Sir, — In the course of research on infectious bronchitis (IB) in chickens in New Zealand, one strain of IB virus was seleted and attenuated as a local vaccine virus and produced in limited quantities at Massey University for trial purposes.     

Letter to the editor

Extract

Sir;– In recent times pig farmers have become aware through their own industry sources that parvovirus is a widespread infection in N.Z. pig herds. Consequently, at last year's Pig Production Course held at Massey University, two paers were devoted to the subject. The farmers' interest was obvious from the extensive discussion period that followed.