|Lott, Berry - MISSISSIPPI STATE UNIV|
|Pharr, G - MISSISSIPPI STATE UNIV|
Submitted to: Avian Diseases
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: September 27, 2004
Publication Date: March 15, 2005
Citation: Branton, S.L., Lott, B.D., Evans, J.D., Collier, S.D., Roush, W.B., Bearson, S.M., Bearson, B.L., Pharr, G.T. 2005. A self-propelled, constant speed spray vaccinator for commercial layer chickens. Avian Diseases. 49:147-151. Interpretive Summary: The commercial table egg sector of the poultry industry, like virtually all farming, is moving toward fewer but larger farms. Many of these farms have 14 chicken houses with each house containing about 75,000 birds. In order to protect the chickens numerous vaccines must be administered over the two year life of the birds. Modified leaf blowers have been used for vaccine administration but for a variety of reasons, relatively few birds receive sufficient vaccine to result in an immune reaction. The vaccine cost alone for a single vaccination of one house of birds is about $1,400.00; this does not include the labor cost. When the vaccine does not result in a sufficient immune response, the chickens must be re-vaccinated. In order to more uniformly vaccinate layer chickens, a self-propelled vaccinator was built which produces a more consistent and uniform vaccination. The vaccinator reduces manpower by 80% and time to vaccinate a house of chickens by 84%.