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Bovine Infectious Abortion: Progress of Control Work

Storrs Agricultural Experiment Station

Abstract

The problem of abortion control has occupied the attention of animal disease investigators for several decades. However, little progress has been made in this field until the last four or five years, when new lines of attack were laid down as the result of more intensive fundamental research.

The recent observations of Barnes (1925–26), Sims and Miller (1926), Fitch (1926), Newson and Cross (1927) and Rettger, McAlpine, White and Johnson (1928) have fully demonstrated the feasibility of establishing negative herds by the elimination of all animals which react to the agglutination, or to both the agglutination and complement fixation tests, and by exercising due precautions against the admission of reacting and infected animals into segregated, permanent herds.

Control Is Based on Two Facts

The entire procedure is based on two important well established facts :

1. The reliability of the above blood tests as a method of locating carriers of Bact. abortus infection.