Journal
CANADIAN JOURNAL OF MICROBIOLOGY
Volume 63, Issue 8, Pages 719-729Publisher
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/cjm-2017-0179
Keywords
Brucella melitensis M5-90; bp26 gene; live attenuated vaccines
Categories
Funding
- National Natural Science Foundation of China [31360610, 31402166, 31460650, 31572491, 31660705]
- National Science and Technology Major Project [2017YFD0500304]
- International Science Technology Cooperation Project of China [2015DFR31110]
Ask authors/readers for more resources
Brucella is Gram-negative intracellular bacterial pathogen that infects humans and animals and contributes to great economic losses in developing countries. Presently, live attenuated Brucella vaccines (Brucella melitensis M5-90) are the most effective means of brucellosis control and prevention in animals. However, these vaccines have several drawbacks, such as an inability to distinguish between a natural infection and immunization and an association with abortions in pregnant animals. Therefore, this study constructed a Brucella M5-90 Delta bp26 mutant and evaluated its virulence. The survival of the M5-90 Delta bp26 mutant was attenuated in human placenta trophoblastic 8 cells (HPT-8 cells) and in BALB/c mice, with a high immunoprotectivity noted in mice. Furthermore, safety tests showed that the M5-90 Delta bp26 mutant was less virulent than the M5-90 vaccine strain. Additionally, an indirect enzyme-linked immunosorbent assay (ELISA) screening was shown to detect the presence of Brucella protein 26 (BP26) with high sensitivity, with M5-90 Delta bp26 inoculation accompanied with a lack of BP26 expression, and was further confirmed by western blotting. Together, the M5-90 Delta bp26 mutant and the indirect ELISA can be employed to distinguish vaccinated livestock from infected animals.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available