Title |
Attenuated Actinobacillus pleuropneumoniae double-deletion mutant S-8∆clpP/apxIIC confers protection against homologous or heterologous strain challenge
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Published in |
BMC Veterinary Research, January 2017
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DOI | 10.1186/s12917-016-0928-9 |
Pubmed ID | |
Authors |
Fang Xie, Gang Li, Long Zhou, Yanhe Zhang, Ning Cui, Siguo Liu, Chunlai Wang |
Abstract |
Actinobacillus pleuropneumoniae is the etiological agent of porcine pleuropneumonia, which leads to large economic losses to the swine industry worldwide. In this study, S-8△clpP△apxIIC, a double-deletion mutant of A. pleuropneumoniae was constructed, and its safety and protective efficacy were evaluated in pigs. The S-8△clpP△apxIIC mutant exhibited attenuated virulence in a murine (BALB/c) model, and caused no detrimental effects on pigs even at a dose of up to 1.0 × 10(9) CFU. Furthermore, the S-8△clpP△apxIIC mutant was able to induce a strong immune response in pigs, which included high levels of IgG1 and IgG2, stimulated gamma interferon (IFN-γ), interleukin 12 (IL-12), and interleukin 4 (IL-4) production, and conferred effective protection against the lethal challenge with A. pleuropneumoniae serovars 7 or 5a. The pigs in the S-8△clpP△apxIIC immunized groups have no lesions and reduced bacterial loads in the lung tissue after challenge. The data obtained in this study suggest that the S-8△clpP△apxIIC mutant can serve as a highly immunogenic and potential live attenuated vaccine candidate against A. pleuropneumoniae infection. |
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Unknown | 2 | 100% |
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Members of the public | 2 | 100% |
Mendeley readers
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Unknown | 19 | 100% |
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Researcher | 5 | 26% |
Student > Bachelor | 3 | 16% |
Student > Ph. D. Student | 2 | 11% |
Lecturer | 1 | 5% |
Student > Master | 1 | 5% |
Other | 1 | 5% |
Unknown | 6 | 32% |
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Pharmacology, Toxicology and Pharmaceutical Science | 2 | 11% |
Agricultural and Biological Sciences | 2 | 11% |
Nursing and Health Professions | 1 | 5% |
Other | 1 | 5% |
Unknown | 6 | 32% |