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从带皮和去皮的肉鸡部位中检出的弯曲杆菌、大肠菌群、大肠杆菌及需氧菌总数的存在情况和水平。

Presence and level of Campylobacter, coliforms, Escherichia coli, and total aerobic bacteria recovered from broiler parts with and without skin.

作者信息

Berrang M E, Ladely S R, Buhr R J

机构信息

Poultry Processing and Meat Quality, US Department of Agriculture, Agricultural Research Service, Russell Research Center, Athens, Georgia 30604-5677, USA.

出版信息

J Food Prot. 2001 Feb;64(2):184-8. doi: 10.4315/0362-028x-64.2.184.

Abstract

This study was undertaken to determine if broiler chicken parts without skin are less contaminated with Campylobacter than those with skin. Samples were taken in a commercial plant from defeathered carcasses before evisceration. Bacterial counts from rinse of aseptically removed meat samples were lower than those from stomached skin samples. No Campylobacter were recovered from meat collected from the breasts or thighs, and only 2 of 10 drumstick meat samples had detectable levels of Campylobacter. However, 9 of 10 breast skin, 10 of 10 thigh skin, and 8 of 10 drumstick skin samples were positive for Campylobacter, with between 2 and 3 log10 CFU/g of Campylobacter. Breasts, thighs, and drumsticks were removed from broiler carcasses following evisceration before entering the chill tank. There was a significant difference (50 to 90%) in the levels of Campylobacter on breasts, thighs, and drumsticks with and without skin. Similar trends were noted for coliform, Escherichia coli, and total aerobic bacterial counts from samples collected in the plant. Broiler part samples were also collected at retail outlets. These samples were either skin on and skinned in the laboratory or skin off at purchase. Aseptic removal of skin from broiler breasts, thighs, and drumsticks did not cause change in Campylobacter, coliform, E. coli, or total aerobic counts recovered from the skinned part. Likewise, parts purchased without skin did not have different bacterial counts than paired parts purchased with the skin on. Consumers should not expect to significantly lower the number of bacteria present on a chicken breast, thigh, or drumstick by removing the skin.

摘要

本研究旨在确定去皮的肉鸡部位是否比带皮的肉鸡部位受弯曲杆菌污染的程度更低。样本取自一家商业工厂中去毛后、内脏摘除前的屠体。无菌取出的肉样冲洗后的细菌计数低于经胃内消化处理的皮样。从鸡胸肉或鸡腿肉采集的样本中未检出弯曲杆菌,10个鸡腿肉样本中只有2个检测到有可检出水平的弯曲杆菌。然而,10个鸡胸皮样本中有9个、10个鸡腿皮样本中有10个、10个鸡腿皮样本中有8个弯曲杆菌呈阳性,弯曲杆菌含量在2至3 log10 CFU/g之间。在进入冷却池之前,从屠体上摘除内脏后取出鸡胸、鸡腿和鸡腿。带皮和不带皮的鸡胸、鸡腿和鸡腿上弯曲杆菌的含量存在显著差异(50%至90%)。在工厂采集的样本中,大肠菌群、大肠杆菌和总需氧菌计数也呈现类似趋势。还在零售点采集了肉鸡部位样本。这些样本要么带皮,在实验室去皮,要么购买时就已去皮。对肉鸡的鸡胸、鸡腿和鸡腿进行无菌去皮处理,并未导致去皮部位回收的弯曲杆菌、大肠菌群、大肠杆菌或总需氧菌数量发生变化。同样,购买的去皮部位与带皮购买的配对部位相比,细菌计数没有差异。消费者不应期望通过去除鸡皮显著降低鸡胸、鸡腿或鸡腿上的细菌数量。

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