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首页> 外文期刊>Poultry Science >Evaluating portable wire-flooring models for inducing bacterial chondronecrosis with osteomyelitis in broilers
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Evaluating portable wire-flooring models for inducing bacterial chondronecrosis with osteomyelitis in broilers

机译：评价用于诱导肉鸡骨髓炎的细菌性软骨坏死的便携式排线模型

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摘要

Rearing broilers on flat or sloping wire flooring is an effective method for consistently triggering lameness attributable to bacterial chondronecrosis with osteomyelitis (BCO). Portable obstacles known as speed bumps (SB) also consistently trigger modest incidences of BCO when they are installed between feed and water lines in litter flooring facilities. Two experiments were conducted to determine the most effective broiler age for introducing the SB into litter flooring pens, and to evaluate alternative configurations of the traditional SB with the expectation that amplified mechanical challenges to the legs of broilers should increase the incidence of BCO. Broiler chicks obtained from commercial hatcheries (lines B and D in experiment 1, lines A and B in experiment 2) were reared in floor pens with ad libitum feed and water and a 23L:1D photoperiod. In experiment 1, the 5 floor treatments included wood shavings litter only (L), flat wire only (W), or litter plus SB installed at 14, 28, or 42 d of age. Line B was more susceptible to lameness than line D (25.9 vs. 15.3% for all treatments combined; P - 0.001). Both lines developed low incidences of lameness on L (11 to 13%), intermediate incidences on SB regardless of day of installation (12 to 23%), and high incidences on W (21 to 39%). In experiment 2, broilers were reared with 7 floor treatments, including L, W, SB with a 50% slope (SB50%); SB50% with a limbo bar installed over the apex; SB with a 66% slope and limbo bar; SB50% with a nipple water line suspended over the apex; and a pagoda-top SB. All SB were inserted on d 28. Line B was more susceptible to lameness than line A (20.2 vs. 16.1% for all treatments combined; P < 0.05), and for both lines combined the lameness percentages averaged 7.7 (L), 29.2 (W), 17.3 (SB50%), 16.2 (SB50% with a limbo bar), 21.5 (SB with a 66% slope and limbo bar), 20.8 (SB50% with a nipple water line), and 11.5% (pagoda-top). These studies demonstrate the portable SB can be effectively used to experimentally trigger BCO in broilers.
机译：在平坦或倾斜的金属地板上饲养肉鸡是一种有效的方法，能够持续触发可归因于骨髓炎（BCO）的细菌性软骨坏死的la行。当将便携式障碍物安装在垫料地板设施中的进水管线和进水管线之间时，也经常触发适度的BCO发生。进行了两个实验，以确定将SB引入垫料地板中的最有效的肉鸡年龄，并评估传统SB的替代配置，并期望对肉鸡腿部的机械挑战放大会增加BCO的发生率。从商业孵化场（实验1中的B和D线，实验2中B和D线）获得的肉鸡雏鸡用自由采食的饲料和水和23L：1D光周期在地板笔中饲养。在实验1中，这5种地板处理包括仅刨花垃圾（L），仅扁钢丝（W）或在14、28或42 d年龄安装的垃圾加SB。与D系相比，B系对la行更敏感（所有治疗合计25.9比15.3％; P-0.001）。两条线在L上发生low行的发生率均较低（11％至13％），在不考虑安装天数的情况下在SB处出现中度发生率（12％至23％），而在W上发生率较高（21至39％）。在实验2中，对肉鸡进行7种地面处理，包括L，W，SB斜率50％（SB50％）; SB50％，在顶点上方安装了边缘条; SB的坡度和坡度为66％; SB50％，乳头水管悬挂在顶点上;和一个塔顶的SB。所有SB均在第28天插入。与A系相比，B系对la行的敏感性更高（所有治疗合计为20.2比16.1％; P <0.05），并且两行的la行百分数平均为7.7（L），29.2（ W），17.3（SB50％），16.2（SB50％带有边缘护弓），21.5（SB带有66％坡度和边缘护弓），20.8（SB50％带有乳头供水管）和11.5％（塔顶）。这些研究表明，便携式SB可以有效地用于实验激发肉鸡中的BCO。

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