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9 results on '"Song, Qianhua"'

4. Antibacterial Pattern of Rosa roxburghiiTratt Pomace Crude Extract Against Staphylococcus aureusand Its Application in Preservation of Cooked Beef

Author

Chen, Xi, Zheng, Xiuyan, Fan, Chengwei, Song, Qianhua, Tian, Zhuxi, Huang, Daomei, Li, Yongfu, Meng, Fanbo, Chang, Yunhe, Wei, Xiaoping, and Fei, Peng

Abstract

Staphylococcus aureusis a common foodborne pathogen and spoilage bacterium in meat products. To develop a natural preservative for meat products, this study revealed the antibacterial activity and mechanism of Rosa roxburghiiTratt pomace crude extract (RRPCE) against S. aureus, and applied RRPCE to the preservation of cooked beef. The diameter of inhibition zone, minimum inhibitory concentration (MIC), and minimum bactericide concentration of RRPCE against S. aureuswere 15.85 ± 0.35 to 16.21 ± 0.29 mm, 1.5 mg/mL, and 3 mg/mL, respectively. The growth curve of S. aureuswas completely stalled by treatment with RRPCE at 2 MIC. RRPCE results in the decrease of intracellular adenosine 5′-triphosphate (ATP) content, depolarization of cell membrane, leakage of cell fluid including nucleic acid and protein, and destruction of cell membrane integrity and cell morphology. During storage, RRPCE significantly reduced S. aureusviable counts, pH, and total volatile basic nitrogen of cooked beef compared with untreated samples (p< 0.05). In addition, RRPCE could significantly increase the redness (a*) value, decrease lightness (L*) and yellowness (b*) values, and slow down the color change of cooked beef (p< 0.05). These findings suggest that RRPCE can effectively inhibit S. aureus, and has the potential as a natural preservative for the preservation of cooked beef.

Published
2023
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5. Emergence of a Plasmid-Encoded Resistance-Nodulation-Division Efflux Pump Conferring Resistance to Multiple Drugs, Including Tigecycline, in Klebsiella pneumoniae

Author

Lv, Luchao, primary, Wan, Miao, additional, Wang, Chengzhen, additional, Gao, Xun, additional, Yang, Qiwen, additional, Partridge, Sally R., additional, Wang, Yang, additional, Zong, Zhiyong, additional, Doi, Yohei, additional, Shen, Jianzhong, additional, Jia, Peiyao, additional, Song, Qianhua, additional, Zhang, Qianhui, additional, Yang, Jun, additional, Huang, Xianhui, additional, Wang, Minggui, additional, and Liu, Jian-Hua, additional

Published
2020
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6. Rapid Increase in Carbapenemase-Producing Enterobacteriaceae in Retail Meat Driven by the Spread of the bla NDM-5 -Carrying IncX3 Plasmid in China from 2016 to 2018

Author

Zhang, Qianhui, primary, Lv, Luchao, additional, Huang, Xiuyu, additional, Huang, Ying, additional, Zhuang, Zilin, additional, Lu, Jiaxun, additional, Liu, Enyu, additional, Wan, Miao, additional, Xun, Haoliang, additional, Zhang, Zhiwei, additional, Huang, Jin, additional, Song, Qianhua, additional, Zhuo, Chao, additional, and Liu, Jian-Hua, additional

Published
2019
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9. Rapid Increase in Carbapenemase-Producing Enterobacteriaceaein Retail Meat Driven by the Spread of the blaNDM-5-Carrying IncX3 Plasmid in China from 2016 to 2018

Author

Zhang, Qianhui, Lv, Luchao, Huang, Xiuyu, Huang, Ying, Zhuang, Zilin, Lu, Jiaxun, Liu, Enyu, Wan, Miao, Xun, Haoliang, Zhang, Zhiwei, Huang, Jin, Song, Qianhua, Zhuo, Chao, and Liu, Jian-Hua

Abstract

The presence and molecular characteristics of carbapenemase-producing Enterobacteriaceae(CPE) among meat products in China were investigated. A total of 110 carbapenem-resistant Enterobacteriaceae(CRE) isolates, including 94 Escherichia coliand 10 Klebsiella pneumoniaeisolates, were identified from 105 of 794 (13.2%) samples. The positive rates markedly increased from 2016 (9.4%) to 2018 (22.2%). Only blaNDMgenes were detected; 79.1% of blaNDMgenes were carried by IncX3 plasmids.

Published
2019
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