Bactericidal Activity of M Protein Antibodies Against Group A Streptococcus
Author Information
Author(s): Yoonim Nonglak, Olive Colleen, Pruksachatkunakorn Chulabhorn, Pruksakorn Sumalee
Primary Institution: Department of Microbiology, Faculty of Medicine, Chiang Mai University, Thailand
Hypothesis
Can antibodies against the conserved region of the M protein effectively kill various strains of group A streptococcus from the Northern Thai population?
Conclusion
The study found that antibodies raised against the M protein conserved C-repeat region can effectively kill multiple strains of group A streptococcus in the Northern Thai population.
Supporting Evidence
- The study identified 14 different J14-types among the GAS isolates.
- Antisera raised against the M protein conserved C-repeat region showed over 70% bactericidal activity against multiple GAS strains.
- The J14.1 type was the most common sequence found in the C2 and C3-repeats.
Takeaway
Scientists tested some special proteins to see if they could help fight a type of bacteria that makes people sick, and they found that these proteins worked really well.
Methodology
The study involved sequencing emm genes of GAS isolates and testing the bactericidal activity of antisera against multiple Thai GAS strains.
Limitations
Only 25% of GAS isolates contained the J14 sequence, which may limit the effectiveness of the vaccine.
Participant Demographics
GAS strains were isolated from the normal population and patients with sore throat, rheumatic heart disease, or impetigo in Chiang Mai, Thailand.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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