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Published on: August 19, 2016
Pathogenesis of group A streptococcal infections
Anna Henningham1, Timothy C Barnett, Peter G Maamary
1School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, University of Queensland, St. Lucia, Queensland 4072, Australia.
Abstract:
Group A Streptococcus (GAS; Streptococcus pyogenes) is a human pathogen which causes significant morbidity and mortality globally. GAS typically infects the throat and skin of the host, causing mild infections such as pharyngitis and impetigo, in addition to life threatening conditions including necrotizing fasciitis, streptococcal toxic shock syndrome (STSS), and bacteremia. Repeated infection with GAS may result in the non-suppurative sequelae, acute rheumatic fever, and acute glomerulonephritis. GAS remains sensitive to the antibiotic penicillin which can be administered as a means to treat infection or as prophylaxis. However, issues with patient compliance and a growing concern over the possible emergence of resistant GAS strains may limit the usefulness of antibiotics in the future. A vaccine capable of preventing GAS infection may be the only effective way to control and eliminate GAS infection and disease.
Insights
Group A Streptococcus (GAS) causes serious global health issues, from mild infections to life-threatening conditions. A GAS vaccine is crucial for future control due to antibiotic resistance concerns.
Area of Science:
- Microbiology
- Infectious Diseases
- Public Health
Background:
- Group A Streptococcus (GAS), or Streptococcus pyogenes, is a significant human pathogen responsible for global morbidity and mortality.
- GAS infections range from common pharyngitis and impetigo to severe conditions like necrotizing fasciitis, streptococcal toxic shock syndrome (STSS), and bacteremia.
- Repeated GAS infections can lead to severe non-suppurative sequelae, including acute rheumatic fever and acute glomerulonephritis.
Purpose of the Study:
- To highlight the global health impact of Group A Streptococcus infections.
- To discuss the limitations of current antibiotic treatments for GAS.
- To emphasize the potential of a GAS vaccine for future disease control.
Main Methods:
- This is a review and discussion of existing literature on GAS epidemiology, clinical manifestations, and treatment challenges.
- Analysis of the current sensitivity of GAS to penicillin and concerns regarding emerging resistance.
- Evaluation of the potential role of vaccination in preventing GAS infections.
Main Results:
- GAS infections present a wide spectrum of disease severity and can lead to long-term complications.
- Penicillin remains effective but faces challenges from patient compliance and potential antibiotic resistance.
- Vaccination is proposed as a critical future strategy for controlling GAS.
Conclusions:
- Group A Streptococcus poses a substantial global health burden, necessitating effective control strategies.
- The emergence of antibiotic resistance and compliance issues underscore the need for alternative prevention methods.
- A vaccine for GAS is essential for the future control and potential elimination of GAS-related diseases.
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