Polyandroalbumin immunisation

Authors: Sommerville GF
Publication: New Zealand Veterinary Journal, Volume 32, Issue 5, pp 80, May 1984
Publisher: Taylor and Francis

Animal type: Livestock, Production animal, Ruminant, Sheep
Subject Terms: Immune system/immunology, Mortality/morbidity, Pregnancy, Reproduction, Reproduction - female, Vaccination
Article class: Correspondence

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Abstract: In their paper published in the January February issue of the Journal, Geldard, Scaramuzzi and Wilkins”` showed that immunization of ewes against polyandroalbumin results in increased lambing and tailing percentages. More consistent increases were achieved with those flocks where the time scale of treatments in relation to ram joining fell within recommended limits. For optimum lambing results the schedule should consist of two injections in the first year spaced 3 to 4 weeks apart, followed by a “boost to join” interval of 2 to 4 weeks before the introduction of the rams. The latter interval is the more critical of the two. (The interval recommended for New Zealand is 3 to 4 weeks.) In the paper referred to above, the tailing figures for one flock, No. 155, were not available. These are now presented. Of the 192 ewes under treatment, 352 lambs were born and 240 tailed. In the untreated group of 196 ewes, 292 lambs were born and 233 were tailed. The related percentages are…

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