Subclinical pneumonia in lambs

Authors: O'Connell E, Boyes BW, Wilkins MF, Thurley DC, Humphreys S, Davies DH
Publication: New Zealand Veterinary Journal, Volume 25, Issue 7, pp 173-176, Jul 1977
Publisher: Taylor and Francis

Animal type: Livestock, Production animal, Ruminant, Sheep
Subject Terms: Bacterial, Notifiable organisms/exotic disease, Disease/defect, Infectious disease, Pneumonia/pleurisy, Respiratory system, Viral
Article class: Scientific Article

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Abstract: Groups of lambs were either slaughtered at weekly intervals between November and June, or regularly sampled over this period. The number of isolations of Pasteurella haemolytica and Mycoplasma sp. from the lungs increased during the later part of two seasons, as did the incidence of lesions typical of enzootic pneumonia. P. haemolytica was frequently isolated after February from nasal swabs in spite of the presence of serum antibody titres against this organism. Serum antibody titre to two adenoviruses were found to fall to a low level, one in January, the other in May, and then to rise again. Virus isolations were made at the time the homologous antibody titres were lowest.

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