Analysis of biological hazards and control points in layer houses

Lee, Sung-Mo; Yoo, Han Sang; Honsg,  Chong-Hae

Korean Journal of Veterinary Research 2004;44(4):593-605.

Sung-Mo Lee¹, Han Sang Yoo², Chong-Hae Honsg³

¹Incheon Metropolitan City Institute of Health & Environment
²College of Veterinary Medicine and School of Agricultural Biotechnology, Seoul National University
³Department of Veterinary Medicine, Kangwon National University

산란계 농장에서의 생물학적 위해요인과 관리점 분석

이성모¹, 유한상², 홍종해³

¹인천광역시 보건환경연구원
²서울대학교 수의과대학 및 농생명공학부
³강원대학교 수의학과

Abstract

An egg has been considered as one of the most important food sources because of it's nutritional superiority and reasonable price. With the complexity of egg flow system from production to consumption in Korea, preventive measures for egg safety have been required. Therefore, our study was carried out to analyze hazards for the egg under farm level and develope preventive measures with a purpose of obtaining egg safety. To analyze biological hazards, microbial contamination of egg(normal, dirty and cracked), water, feed, manure and equipments associated with laying were investigated. One isolate of Salmonella enteritidis and S. bardo were detected from the manure and dirty egg shell respectively. The sanitary conditions in the farm were surveyed by questionaries. Confirmation of vaccination for purchasing chicks and establishment of sanitary guidances for water and type of water suppliers ought to be preceded. Feed supplier systems including feed tanks, feed pipes and hoppers were known that their contamination might give it a chance to infect individuals and egg content and shell. The safe and rapid disposal of dead chickens and rodent were reported as more crucial factors to prevent infectious disease and manage good sanitation. Egg selector and collecting belt should be kept properly not to be contaminated from egg fluids and feces. It should be also considered that regular gathering of eggs, removal of dirty or cracked ones, storage under refrigeration and the use of disposable egg tray were continuously fulfilled. Conclusively, Our results suggested that HACCP-based system for providing fresh and safe eggs to consumers should be applied to the farm.

Key Words: egg, biological hazards, control point, HACCP