Do IBR-MLV Parenteral Vaccines Transmit to Non-Vaccinates Resulting in Abortions?
Abstract
During the late 1970 and early 1971 calving seasons an increased incidence of abortions were reported from the Dakotas. A marked increase was noted, particularly in abortions attributed to Infectious Bovine Rhinotracheitis. S.D.S.U. at Brookings, South Dakota, reported 111 cases of IBR abortion in January and February, 1971, as compared to 19 cases for the similar period in 1970. N.D.S.U. at Fargo, North Dakota, reported examining 425 aborted feti from January 1 to April 30, 1971, which was double the number examined for the same period in 1970.