Immune Responses to the Attenuated Mycoplasma hyopneumoniae 168 Strain Vaccine by Intrapulmonic Immunization in Piglets
文献类型: 外文期刊
作者: Feng Zhi-xin 1 ; Shao Guo-qing 1 ; Liu Mao-jun 1 ; Wu Xu-su 1 ; Zhou Yong-qi 1 ; Gan Yuan 1 ;
作者机构: 1.Jiangsu Acad Agr Sci, Minist Agr, Natl Ctr Engn Res Vet Bioprod, Key Lab Anim Dis Diagnost & Immunol,Inst Vet Med, Nanjing 210014, Peoples R China
关键词: Mycoplasma hyopneumoniae;attenuated vaccine;cellular immunity;mucosal immunity
期刊名称:AGRICULTURAL SCIENCES IN CHINA ( 影响因子:0.82; 五年影响因子:0.997 )
ISSN: 1671-2927
年卷期: 2010 年 9 卷 3 期
页码:
收录情况: SCI
摘要: To investigate the immune responses to the attenuated Mycoplasma hyopneumoniae 168 strain vaccine, 8-15 d old piglets were immunized with M. hyopneumoniae 168 strain vaccine by intrapulmonic route. And the specific IgG antibody in serum, lymphoproliferation, IFN gamma, and specific secretory IgA (SIgA) antibody in bronchoalveolar lavage fluid were detected on 30 and 60 d post-immunization (DPI), respectively. On 60 DPI, all the pigs except for those in health control group were challenged with a field M. hyopneumoniae strain JS. Necropsy was performed on 30 d post-challenge (DPC). The results showed that IFN gamma and specific SIgA were stimulated on surface of respiratory tract after immunization. And peripheral blood mononuclear cells could also be proliferated about 1.81 and 2.12 fold on 30 and 60 DPI when stimulated by M. hyopneumoniae protein in vitro. However, no serum IgG antibody against M. hyopneumoniae was detected during the whole immune phage. After challenge, vaccinated pigs were observed with only very slight histological lesion in individual lobes. None of vaccinated pigs showed any clinical signs. While the unvaccinated pigs from challenge control group showed varying degrees of clinical sign and severe macroscopical lesion of mycoplasmal pneumonia of swine (MPS). The result suggested that the attenuated M. hyopneumoniae 168 strain vaccine inoculated by intrapulmonic route could activate the systemic cellular immunity, the local mucosal immunity and IFN gamma secretion in respiratory tract to against M. hyopneumoniae infection in piglets.
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