Development and validation of an attenuated Mycoplasma hyopneumoniae aerosol vaccine

文献类型： 外文期刊

第一作者： Feng, Zhi-Xin

作者： Feng, Zhi-Xin;Wei, Yan-Na;Li, Gui-Lan;Lu, Xiao-Ming;Wang, Zhan-Wei;Kong, Meng;Gan, Yuan;Bai, Fang-Fang;Liu, Mao-Jun;Xiong, Qi-Yan;Wu, Xu-Su;Shao, Guo-Qing;Wan, Xiu-Feng;Pharr, G. Todd

作者机构：

关键词： Mycoplasma hyopneumoniae;Aerosol vaccine;Attenuated aerosol vaccine;Nebulization

期刊名称：VETERINARY MICROBIOLOGY （ 影响因子：3.293； 五年影响因子：3.599 ）

ISSN： 0378-1135

年卷期： 2013 年 167 卷 3-4 期

页码：

收录情况： SCI

摘要： Mycoplasma hyopneumoniae (M. hyopneumoniae) causes a chronic respiratory disease with high morbidity and low mortality in swine, and has been presented as a major cause of growth retardation in the swine industry. Aerosol vaccination presents a needle free, high throughput, and efficient platform for vaccine delivery, and has been widely applied in poultry vaccination. However, aerosol vaccines have rarely been used in swine vaccination primarily because the long and curving respiratory track of swine presents a barrier for vaccine particle delivery. To develop an effective M. hyopneumoniae aerosol vaccine, three major barriers need to be overcome: to optimize particle size for aerosol delivery, to maintain the viability of mycoplasma cells in the vaccine, and to optimize the environmental conditions for vaccine delivery. In this study, an aerosol mycoplasma vaccine was successfully developed based on a conventional live attenuated M. hyopneumoniae vaccine. Specifically, the Pari LCD nebulizer was used to produce an aerosol vaccine particle size less than 5 mu m; and a buffer with 5% glycerol was developed and optimized to prevent inactivation of M. hyopneumoniae caused by aerosolization and evaporation. Before nebulization, the room temperature and relative humidity were control to 20-25 degrees C and 70-75%, respectively, which helped maintain the viability of aerosol vaccine. Animal experiments demonstrated that this newly developed aerosol vaccine was effectively delivered to swine low respiratory track, being confirmed by nested-PCR, in situ hybridization and scanning electron microscope. Moreover, M. hyopneumoniae specific sIgA secretion was detected in the nasal swab samples at 14 days post-immunization. To our knowledge, this is the first report on a live M. hyopneumoniae aerosol vaccine. (C) 2013 Elsevier B.V. All rights reserved.

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