The Feather Follicle Method of Vaccinating with Fowl Laryngotracheitis Vaccine

Abstract

THE accepted method for vaccinating poultry against fowl laryngotracheitis has been to apply the vaccine in the vent of the chicken. The belief has been general and widespread that Fowl Laryngotracheitis Vaccine could be used successfully only in this way and that it could not be applied advantageously into the feather follicles as is done with pox vaccine.During the fall of 1941 one of us (P.C.M.), while conducting experiments with Fowl Laryngotracheitis Vaccine, brushed the vaccine into the feather follicles on the legs of a few chickens as one would do if vaccinating with pox vaccine. It was noted that the follicles began to swell on the second day, that the reaction reached its peak on about the fifth day, and that the swelling receded completely by the seventh or eighth day. The reaction or “take,” was similar to that which appears after applying Pigeon Pox Vaccine to the .