
%0 Journal Article
%A D St George, T 
%A Liefman, CE 
%T A Field Experiment to Assess the Role of Parainfluenza Type 3 Virus in Pneumonia in a Flock of Sheep in Victoria
%J Australian Journal of Biological Sciences
%D 1972/04/01
%V 25
%N 2
%P 319-326
%K 
%R https://doi.org/10.1071/BI9720319
%U https://www.publish.csiro.au/paper/BI9720319 
%X A flock of 33 lambs born to ewes with neutralizing antibody to parainfluenza type 3 (PI3) virus was run with a flock of approximately 150 other lambs and their mothers. When bled shortly after birth, lOO% of the 33 lambs had maternal anti-body to PI3 virus. Four months later, the proportion h!lod fallen to 22%, about which time a natural infection with PI3 virus occurred in the flock as judged by subsequent appearance in the sera of PI3 serum neutralizing antibody. 
