ABSTRACT
The movement of livestock from one country to another occurs today with a frequency and a rapidity that was unthinkable in the preaircraft or prejet age. When livestock moved by sailing vessels, days, weeks, and even months were required for them to reach their destination. We have a comfortable ratio of livestock to the human population, and we have a lower incidence of animal diseases than many other places in the world. It is a job for all concerned with livestock to keep out these diseases that potentially can cost the livestock-men and, in turn, the consumers vast sums. Other diseases have been introduced but have been eradicated and no longer inflict losses on livestock interests. Examples are the bull semen imported from Europe and South America during 1966 to 1976 and, the importation of livestock through special quarantine stations.
