Infectious bovine rhinotracheitis—infectious pustular vaginitis: virus isolation and vaccination studies

Abstract

Extract

Infectious bovine rhinotracheitis (IBR) is an upper respiratory tract disease of cattle producing economic consequences which may range from temporary reduction in milk yield in mild cases, to marked loss in condition and even death in severely affected animals (McKercher et al., 1957; 1958). While the mortality rate is low (2 to 10 per cent.), morbidity may be high, particularly under conditions of close herding such as those associated with hand feeding, and in the milking herd.