中国畜牧兽医 ›› 2025, Vol. 52 ›› Issue (8): 3838-3846.doi: 10.16431/j.cnki.1671-7236.2025.08.032

• 预防兽医 • 上一篇    

响应面法优化副猪嗜血杆菌12型H31菌株发酵培养基组分的研究

赖小婷, 吴崟沣, 任晓敏, 洪健渠, 严芬   

  1. 福州大学生物科学与工程学院, 福州 350108
  • 收稿日期:2024-11-01 发布日期:2025-08-02
  • 通讯作者: 严芬 E-mail:yanfen@fzu.edu.cn
  • 作者简介:赖小婷,E-mail:1805382674@qq.com。
  • 基金资助:
    中央引导地方科技发展专项项目(2022L3033)

Optimization of Fermentation Medium Components of Haemophilus parasuis Serotype 12 H31 Strain by Response Surface Methodology

LAI Xiaoting, WU Yinfeng, REN Xiaomin, HONG Jianqu, YAN Fen   

  1. College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China
  • Received:2024-11-01 Published:2025-08-02

摘要: 【目的】 应用响应面法优化副猪嗜血杆菌(Haemophilus parasuis,Hps)12型H31菌株的发酵培养基组分,以提高活菌数,降低Hps 12型H31菌株发酵生产疫苗的成本,为工业化生产Hps疫苗提供参考。【方法】 通过单因素试验考察牛血清、酵母提取物、烟酰胺腺嘌呤二核苷酸(NAD)、硫酸镁(MgSO4)4种培养基成分对Hps 12型H31菌株活菌数的影响,确定各因素最佳水平范围后,选取合适水平进行BBD(Box-Behnken design)响应面优化设计。通过对牛血清、酵母提取物、NAD、MgSO4 4种培养基成分进行不同组合,系统优化培养基中4种组分的添加量。利用二次响应面回归方法建立活菌数与各组分之间的数学模型,并通过回归分析确定各组分对活菌数的影响程度。【结果】 单因子优化显示,活菌数较大时发酵培养基中各组分添加量区间范围分别为:牛血清8%~10%、酵母提取物0.4%~0.6%、NAD 0.05%~0.1%、MgSO4 0.3~0.5 g/L。在此基础上进一步应用响应面优化,经优化后Hps 12型H31菌株的最佳发酵培养基组分为:牛血清浓度为9.91%,MgSO4浓度为0.21 g/L,酵母提取物浓度为0.59%,NAD浓度为0.09%。与初始培养基成分相比,该菌株经优化后的活菌数从1.2×108 CFU/mL提高到3.0×109 CFU/mL,提升了24倍。【结论】 本试验通过响应面法优化Hps 12型H31菌株发酵培养基,优化后的发酵培养基能提高Hps的活菌数,为工业化生产Hps疫苗提供参考。

关键词: 副猪嗜血杆菌12型H31菌株; 响应面法; 发酵培养基优化

Abstract: 【Objective】 This study aimed to optimize the fermentation medium components of Haemophilus parasuis (Hps) serotype 12 H31 strain by response surface methodology,improve the number of viable bacteria,reduce the cost of vaccine production by fermentation of Haemophilus parasuis serotype 12 H31 strain,and provide reference for industrial production of Hemophilus parasuis vaccine. 【Method】 Employing single-factor experiments,the effects of bovine serum,yeast extract,nicotinamide adenine dinucleotide (NAD) and MgSO4 on the viable bacteria count of Haemophilus parasuis serotype 12 H31 strain were investigated meticulously.After determining the optimal level ranges,suitable levels were selected for Box-Behnken design (BBD) response surface optimization design.The fermentation conditions were systematically optimized by different combinations of bovine serum,yeast extract,NAD and MgSO4.The mathematical model between viable count and each component was established by quadratic response surface regression method,and the influence degree of each component on viable count was determined by regression analysis. 【Result】 Single factor optimization revealed that the optimal ranges of the various components added to the fermentation medium were as follows:When the viable count was high,bovine serum was 8%-10%,yeast extract was 0.4%-0.6%,NAD was 0.05%-0.1% and MgSO4 was 0.3-0.5 g/L.Further application of surface optimization resulted in the determination of the optimal culture medium components for Haemophilus parasuis serotype 12 H31 strain after optimization, bovine serum concentration was 9.91%,MgSO4 concentration was 0.21 g/L,yeast extract concentration was 0.59%,NAD concentration was 0.09%.Compared with the initial medium components,the viable count of the strain was increased from 1.2×108 to 3.0×109 CFU/mL,which was 24 times higher after optimization. 【Conclusion】 In this experiment,the response surface method was used to optimize the fermentation conditions of Haemophilus parasuis serotype 12 H31 strain.The optimized fermentation medium could improve the number of viable bacteria of Haemophilus parasuis well,and provide a reference for the industrial production of Haemophilus parasuis vaccine.

Key words: Haemophilus parasuis serotype 12 H31 strain; response surface methodology; optimization of fermentation medium

中图分类号: