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Use of Proteins Identified through a Functional Genomic Screen To Develop a Protein Subunit Vaccine That Provides Significant Protection against Virulent Streptococcus suisin Pigs
- Source :
- Infection and Immunity; December 2017, Vol. 86 Issue: 3
- Publication Year :
- 2017
-
Abstract
- ABSTRACTStreptococcus suisis a bacterium that is commonly carried in the respiratory tract and that is also one of the most important invasive pathogens of swine, commonly causing meningitis, arthritis, and septicemia. Due to the existence of many serotypes and a wide range of immune evasion capabilities, efficacious vaccines are not readily available. The selection of S. suisprotein candidates for inclusion in a vaccine was accomplished by identifying fitness genes through a functional genomics screen and selecting conserved predicted surface-associated proteins. Five candidate proteins were selected for evaluation in a vaccine trial and administered both intranasally and intramuscularly with one of two different adjuvant formulations. Clinical protection was evaluated by subsequent intranasal challenge with virulent S. suis. While subunit vaccination with the S. suisproteins induced IgG antibodies to each individual protein and a cellular immune response to the pool of proteins and provided substantial protection from challenge with virulent S. suis, the immune response elicited and the degree of protection were dependent on the parenteral adjuvant given. Subunit vaccination induced IgG reactive against different S. suisserotypes, indicating a potential for cross protection.
Details
- Language :
- English
- ISSN :
- 00199567 and 10985522
- Volume :
- 86
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Infection and Immunity
- Publication Type :
- Periodical
- Accession number :
- ejs44855457
- Full Text :
- https://doi.org/10.1128/IAI.00559-17