Abstract
Two experiments were carried out to evaluate the effect of disinfection of a chickencage house by customary techniques on reduction of contaminating bacteria. In Exp.1, the house was washed 14l/m2 of water by jet stream. A volume of 0.4l/m2 oforthodichlorobenzene diluted 1 in 100 and of invert soap diluted 1 in 1000 were sprayed in succession. In Exp. 2, 16l/m2 of water were sprayed for washing and brushing with jet stream was conducted on the floor, cage stands and lower part of wall of the house. The same concentration of the disinfectants were used. But volume of 2 kinds of the disinfectant sprayed was increased to 0.6l/m2, respectively.
A significant reduction of bacteria by washing and by spraying of 2 kind disinfectants was observed on the floor and upper face of the beam in Exp. 1 and Exp. 2. A number of bacteria on the cage stands were reduced significantly in Exp. 2. No reduction of bacteria was observed on the wall, down face of the beam and the attic of the house. After disinfection, 101.2 to 103.7 of bacteria per cm2 were detected from the house. Visible effect was not observed to increase volume of water for washing and of disinfectants for disinfection.
