Microbiological impact of three commercial laying hen housing systems

被引：64

作者：

Jones, D. R. ^{[1
]}

Cox, N. A. ^{[1
]}

Guard, J. ^{[1
]}

Fedorka-Cray, P. J. ^{[1
]}

Buhr, R. J. ^{[1
]}

Gast, R. K. ^{[1
]}

Abdo, Z. ^{[1
]}

Rigsby, L. L. ^{[1
]}

Plumblee, J. R. ^{[1
]}

Karcher, D. M. ^{[2
]}

Robison, C. I. ^{[2
]}

Blatchford, R. A. ^{[3
]}

Makagon, M. M. ^{[2
]}

机构：

[1] ARS, USDA, Russell Res Ctr, Athens, GA 30605 USA

[2] Michigan State Univ, Dept Anim Sci, E Lansing, MI 48824 USA

[3] Univ Calif Davis, Dept Anim Sci, Davis, CA 95616 USA

来源：

POULTRY SCIENCE | 2015年 / 94卷 / 03期

关键词：

hen housing; microbiology; egg; Salmonella; Campylobacter; BACTERIAL EGGSHELL CONTAMINATION; FURNISHED CAGES; SALMONELLA-ENTERITIDIS; CONVENTIONAL CAGES; EGG MICROBIOLOGY; INTERNAL ORGANS; ENRICHED CAGES; SHELL EGGS; TABLE EGGS; CAMPYLOBACTER;

D O I：

10.3382/ps/peu010

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Hen housing for commercial egg production continues to be a societal and regulatory concern. Controlled studies have examined various aspects of egg safety, but a comprehensive assessment of commercial hen housing systems in the US has not been conducted. The current study is part of a holistic, multidisciplinary comparison of the diverse aspects of commercial conventional cage, enriched colony cage, and cage-free aviary housing systems and focuses on environmental and egg microbiology. Environmental swabs and eggshell pools were collected from all housing systems during 4 production periods. Total aerobes and coliforms were enumerated, and the prevalence of Salmonella and Campylobacter spp. was determined. Environmental aerobic and coliform counts were highest for aviary drag swabs (7.5 and 4.0 log cfu/mL, respectively) and enriched colony cage scratch pad swabs (6.8 and 3.8 log cfu/mL, respectively). Aviary floor and system wire shell pools had the greatest levels of aero-bic contamination for all eggshell pools (4.9 and 4.1 log cfu/mL, respectively). Hens from all housing systems were shedding Salmonella spp. (89-100% of manure belt scraper blade swabs). The dry belt litter removal processes for all housing systems appear to affect Campylobacter spp. detection (0-41% of manure belt scraper blade swabs) considering detection of Campylobacter spp. was much higher for other environmental samples. Aviary forage area drag swabs were 100% contaminated with Campylobacter spp., whereas enriched colony cage scratch pads had a 93% positive rate. There were no differences in pathogen detection in the shell pools from the 3 housing systems. Results indicate egg safety is enhanced when hens in alternative housing systems use nest boxes. Additionally, current outcomes indicate the use of scratch pads in hen housing systems needs to be more thoroughly investigated for effects on hen health and egg safety.

引用

页码：544 / 551

页数：8

共 27 条

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