본 연구에서는 이산화염소수를 이용한 계사 내 깔짚의 미생물 수 저감화를 통한 깔짚의 미생물학적 안전성 확보를 위하여 연구를 수행하였다. 사용하기 전의 깔짚에는 coliform, E. coli, Listeria spp., yeasts and molds 및 total aerobic bacteria가 높은 수준으로 검출되었으며 사용기간이 늘어남에 따라 미생물 수가 증가하였다. 500 ppm 이산화염소수를 이용한 살균처리에서는 coliform, E. c

We evaluated microbial inactivation in chicken cage litter, to ensure microbial safety, using aqueous chloride dioxide. Contamination by coliforms, Escherichia coli, Listeria spp., yeasts and molds, total aerobic bacteria, and Salmonella spp. was detected in fresh cage litter, and microbial populations increased if litters were repeatedly used. Aqueous treatment (500 ppm) significantly decreased the populations of coliforms, E. coli, Listeria spp., yeasts and molds, total aerobic bacteria, and Salmonella spp. in all litter samples tested. In particular, aqueous treatment on fresh litter reduced the initial populations of coliform, E. coli, Listeria spp., yeasts and molds, and total aerobic bacteria by 4.47, 1.29, 1.23, 3.24, and 5.2 log CFU/g, respectively. In addition, when litters used for 1 and 5 weeks were tested, treatment significantly reduced microbial populations. The results suggest that aqueous treatment is useful to reduce microbial hazards in chicken cage litter and to improve the microbial safety of slaughtered chickens.

• 유동진
• 김현진
• 송현정
• 신윤지
• 채현석
• 송경빈