Strain of Escherichia coli by bacterial conjugation

摘要

A new strain of Escherichia coli which is enteropathogenic to both calves and piglets is produced by bacterial conjugation of two parents, one enteropathogenic solely to calves and one enteropathogenic solely to piglets. The new strain is useful in the preparation of a vaccine for use in both calves and piglets to prevent colibacillosis.