Back to Search
Start Over
Investigation of group A Streptococcus immune responses in an endemic setting, with a particular focus on J8
- Source :
- Vaccine. 36:7618-7624
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Sustained control of group A Streptococcus (GAS) infections in settings of poverty has proven to be challenging, and an effective vaccine may be the most practical long-term strategy to reduce GAS-related disease burden. Candidate GAS vaccines based on the J8 peptide have demonstrated promising immunogenicity in mice, however, less is known about the role of J8 antibodies in the human immune response to GAS infection. We analysed the stimulation of J8 antibodies in response to infection, and the role of existing J8 antibodies in protection against subsequent infection, using data collected in the Fijian population: (1) cross sectional population serosurvey; (2) paired serum collection for assessment of M-specific and J8 antibody responses; and (3) longitudinal assessment of GAS infection and immunity. Median J8 antibody concentrations peaked in the 5-14 year age group, but there was no sustained increase with age. J8 antibody concentration was neither a significant predictor of time to next infection, nor did it show any relationship to the time since last recorded skin infection. Similarly, J8 antibody fold changes over a defined period were associated neither with the time since last skin infection, nor the number of intervening skin infections. While strong M-specific antibody responses were observed for skin infection, similarly strong J8 antibody responses were not observed. There is no indication that antibodies to the J8 antigen would be useful as either a marker of GAS infection or a measure of population immunity, with J8 antibody responses to infection fleeting, if existent at all.
- Subjects :
- 0301 basic medicine
Endemic Diseases
Skin infection
Mice
0302 clinical medicine
Seroepidemiologic Studies
Longitudinal Studies
Prospective Studies
030212 general & internal medicine
Child
education.field_of_study
biology
Immunogenicity
Age Factors
Middle Aged
Antibodies, Bacterial
Infectious Diseases
Child, Preschool
Molecular Medicine
Antibody
Adult
Adolescent
Streptococcus pyogenes
030106 microbiology
Population
Article
Herd immunity
Young Adult
03 medical and health sciences
Immune system
Antigen
Immunity
Streptococcal Infections
medicine
Animals
Fiji
Humans
education
Aged
Antigens, Bacterial
General Veterinary
General Immunology and Microbiology
business.industry
Infant, Newborn
Public Health, Environmental and Occupational Health
Infant
medicine.disease
Cross-Sectional Studies
Immunology
biology.protein
business
Subjects
Details
- ISSN :
- 0264410X
- Volume :
- 36
- Database :
- OpenAIRE
- Journal :
- Vaccine
- Accession number :
- edsair.doi.dedup.....e7c69a5bc842d5a429be4ff26effc056