The Live Attenuated Actinobacillus pleuropneumoniae Triple-Deletion Mutant Delta apxIC Delta apxIIC Delta apxIV-ORF1 Strain, SLW05, Immunizes Pigs against Lethal Challenge with Haemophilus parasuis
文献类型： 外文期刊
作者： Fu, Shulin 1 ; Ou, Jiwen 1 ; Zhang, Minmin 2 ; Xu, Juan 1 ; Liu, Huazhen 1 ; Liu, Jinlin 3 ; Yuan, Fangyan 4 ; Chen, Huan 1 ;
作者机构： 1.Huazhong Agr Univ, State Key Lab Agr Microbiol, Coll Vet Med, Wuhan, Hubei, Peoples R China
2.Chinese Acad Agr Sci, State Key Lab Vet Biotechnol, Harbin Vet Res Inst, Beijing 100193, Peoples R China
3.Cent China Normal Univ, Coll Life Sci, Wuhan, Hubei, Peoples R China
4.Hubei Acad Agr Sci, Hubei Key Lab Anim Embryo & Mol Breeding, Inst Anim Husb & Vet Sci, Wuhan, Hubei, Peoples R China
期刊名称：CLINICAL AND VACCINE IMMUNOLOGY （ 影响因子：3.233； 五年影响因子：2.562 ）
ISSN： 1556-6811
年卷期： 2013 年 20 卷 2 期
页码：
收录情况： SCI
摘要： Haemophilus parasuis and Actinobacillus pleuropneumoniae both belong to the family Pasteurellaceae and are major respiratory pathogens that cause large economic losses in the pig industry worldwide. We previously constructed an attenuated A. pleuropneumoniae serovar 1 live vaccine prototype, SLW05 (Delta apxIC Delta apxIIC Delta apxIV-ORF1), which is able to produce nontoxic but immunogenic ApxIA, ApxIIA, and ApxIVA. This triple-deletion mutant strain was shown to elicit protective immunity against virulent A. pleuropneumoniae. In the present study, we investigated whether immunization with SLW05 could also protect against lethal challenge with virulent H. parasuis SH0165 (serovar 5) or MD0322 (serovar 4). The SLW05 strain was found to elicit a strong humoral antibody response in pigs and to confer significant protection against challenge with a lethal dose of H. parasuis SH0165 or MD0322. IgG subtype analysis revealed that SLW05 induces a bias toward a Th1-type immune response and stimulates interleukin 2 (IL-2) and gamma interferon (IFN-gamma) production. Moreover, antisera from SLW05-vaccinated pigs efficiently inhibited both A. pleuropneumoniae and H. parasuis growth in a whole-blood assay. This is the first report that a live attenuated A. pleuropneumoniae vaccine with SLW05 can protect against lethal H. parasuis infection, which provides a novel approach for developing an attenuated H. parasuis vaccine.
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