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Effect of washing and disinfection of a feed hopper and a broiler container on reduction of viable bacteria was measured.1) A number of 105.2 of bacteria per cm2 contamimating on a hopper were reduced to 102.6 after washing in a tank with 3 m3 of tap water. Disinfection of the hoppers was carried out to dip into the solutions invert soap or iodophor diluted 1 in 400 or into orthodichlorobenzene diluted 1 in 100, respectively, during 5 seconds. After dipping, a half number of the hoppers were placed in outdoor to expose direct sun beam and the others were kept in indoor during 24 hours. A number of 100.2-100.5 of bacteria per cm2 were detected from the hoppers placd in outdoor and 100.5-100.8 of bacteria from ones in indoor.2) A broiler container was contaminated with 104.8/cm2 of bacteria. After washing with jet stream, number of bacteria reduced to 103.8 and 24 hours after spraying 200 ml per container of disinfectant solution invert soap or iodophor diluted 1 in 400 like a mist, number of bacteria reduced to 103.1-103.6/cm2.When the containers were washed with brushing 104.6 of bacteria per cm2 were reduced to 103.2 and 102.0-102.5 of bacteria were detected from the containers at 24 hours after spraying the solution invert soap or iodophor. And 102.6 of bacteria also detected from the container at 24 hours after spraying the same amount of invertamphoteric compound solution diluted 1 in 400.3) It is considered that reduction of bacteria prior to disinfectaon is important to obtain a high degree of disinfection.
- 日本家禽学会の論文
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