Comparison of immune responses to intranasal and intrapulmonary vaccinations with the attenuated Mycoplasma hyopneumoniae 168 strain in pigs
文献类型： 外文期刊
作者： Li, Pengcheng 1 ; Li, Yunfeng 1 ; Shao, Guoqing 3 ; Yu, Qinghua 1 ; Yang, Qian 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Vet Med, Nanjing, Jiangsu, Peoples R China
2.Jiangsu Acad Agr Sci, Natl Res Ctr Vet Biol Engn & Technol, Nanjing, Jiangsu, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Vet Med, Key Lab Anim Dis Diagnost & Immunol, Nanjing, Jiangsu, Peoples R China
关键词： attenuated Mycoplasma hyopneumoniae 168 strain;intranasal immunization;intrapulmonary immunization;respiratory tract;swine
期刊名称：JOURNAL OF VETERINARY MEDICAL SCIENCE （ 影响因子：1.267； 五年影响因子：1.348 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： The aim of this study was to evaluate the immune responses to intranasal and intrapulmonary vaccinations with the attenuated Mycoplasma hyopneumoniae (Mhp) 168 strain in the local respiratory tract in pigs. Twenty-four pigs were randomly divided into 4 groups: an intranasal immunization group, an intrapulmonary immunization group, an intramuscular immunization group and a control group. The levels of local respiratory tract cellular and humoral immune responses were investigated. The levels of interleukin (IL)-6 in the early stage of immunization (P<0.01), local specific secretory IgA (sIgA) in nasal swab samples (P<0.01); and IgA- and IgG-secreting cells in the nasal mucosa and trachea were higher after intranasal vaccination (P<0.01) than in the control group. Interestingly, intrapulmonary immunization induced much stronger immune responses than intranasal immunization. Intrapulmonary immunization also significantly increased the secretion of IL-6 and local specific sIgA and the numbers of IgA- and IgG-secreting cells. The levels of IL-10 and interferon-gamma in the nasal swab samples and the numbers of CD4(+) and CD8(+) T lymphocytes in the lung and hilar lymph nodes were significantly increased by intrapulmonary immunization compared with those in the control group (P<0.01). These data suggest that intrapulmonary immunization with attenuated Mhp is effective in evoking local cellular and humoral immune responses in the respiratory tract. Intrapulmonary immunization with Mhp may be a promising route for defense against Mhp in pigs.
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