University of Minnesota

Daryll Emery

Kakambi V Nagaraja

A vaccine for the immunization of domestic fowl, such as turkeys and chickens, against E. coli infections (Colibacillosis) is disclosed which contains an effective amount of a live temperature sensitive mutant of E. coli dispersed in a physiologically acceptable, non-toxic liquid vehicle. The E. coli mutant disclosed exhibits growth at 32.degree. C. but not at 41.degree. C. and has a reversion frequency of less than about 1.times.10.sup.-8.

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Hugo, MN, United States of America

Daryll Emery