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Experiments were conducted to evaluate of effect of washing by jet stream (Exp. 1 and Exp. 2) and of disinfection by spraying disinfectant solution (Exp. 3) on reduction of bacteria on a chicken cage house.In Exp. 1, test pieces (1×5 cm) made with slate, cedar, plywood and zinc sheet were contaminated artificially. The each piece was contaminated with 105.9 to 106.1 of Staphylococcus aureus. The pieces were placed in several locations in the house, slate on attic, cedar on upper and down faces of wooden beam, plywood on wall and zinc sheet on cage stand. The house was washed by jet stream with 3l/m2 of water. The greatest reduction of bacteria was observed on cage stand. A number of bacteria on the pieces placed on cage stand reduced to 103.2. No visible effect was observed on reduction of bacteria on the pices placed on beam of the house.In exp. 2, contamination with bacteria was occurred naturally with keeping chickens in the house during 2 weeks. Washing was carried out by jet stream with 3 or 4l of water per m2. Reduction of bacteria contaminating on the house was less than 1/10. A degree of contamination with bacteria after washing was not different remarkably between 2 treatments washed with 3 and 4.5l of water per m2.In Exp. 3, disinfectant solution invert soap diluted 1 to 300 or to 1000 was sprayed the washed house. Reduction of bacteria contaminating on the house was less than 1/10. Effect of concentration of the solution on the reduction of bacteria was not markedly.
- 日本家禽学会の論文
日本家禽学会 | 論文
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