Abstract
Although it is desirable that a chicken house floor contaminated heavily with bacteria is washed by jet stream with brushing, the brushing by man power is not easy in practice. Effects of painting the floor and of brushing by mechanical power were examined.
1) Bacterial counts of a broiler house floor with and without painting were 106.5 per cm2. After washing with brushing by man power, bacterial counts on the both floors were reduced to 104.8/cm2. Painting the floor had little effect to reduce bacterial count.
2) The floor without painting was washed with brushing by mechanical power. A loader attached with rotary brush was used. When revolution of rotary brush was 120 rpm and the loader moved 3.5 km per hour, bacterial counts on the floor were almost the same to those observed after washing by man power. After washing, 105.1/cm2 of bacteria were detected from the floor washed by mechanical power and 104.9/cm2 of bacteria by man power.
