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Updated: May 22, 2026

Constructing Mutants in Serotype 1 Streptococcus pneumoniae strain 519/43
Published on: September 11, 2020
[Group A streptococcal pneumonia]
Heikki Lukkarinen1, Harri Marttila, Juha Perttilä
1TYKS, lastenklinikka.
Insights
Group A betahemolytic streptococcus can cause severe pneumonia with toxic shock syndrome. Early clindamycin use may improve outcomes in this rare but serious infection.
Area of Science:
- Infectious Diseases
- Critical Care Medicine
- Microbiology
Background:
- Group A betahemolytic streptococcus (GABHS) is a significant pathogen.
- GABHS can lead to severe pneumonia, septic shock, and multiorgan failure.
- This severe presentation is rare and can have delayed diagnosis and treatment.
Observation:
- This study reports on four patients (two children, two adults) with GABHS pneumonia and toxic shock syndrome.
- All patients required mechanical ventilation.
- Three patients received clindamycin in addition to other antibiotics.
Findings:
- All patients experienced a full recovery from the acute illness.
- One patient developed permanent optic neuropathy, resulting in vision loss.
- Clindamycin's role in restraining GABHS toxin production was utilized.
Implications:
- Prompt diagnosis and aggressive treatment are crucial for GABHS-induced pneumonia and toxic shock syndrome.
- Clindamycin may be a valuable adjunct therapy due to its effect on toxin production.
- Healthcare providers should be vigilant for this rare but devastating condition.
Abstract:
Group A betahemolytic streptococcus may cause a severe pneumonia that is accompanied by septic shock and multiorgan failure. The disease is rare and may develop slowly and thus the diagnosis and the most efficient treatment may be delayed. We describe two children and two adults with pneumonia and toxic shock syndrome caused by group A streptococci. All patients needed ventilator treatment. In addition to other antibiotics clindamycin, that restrains toxin production by group A streptococci, was administered to three of the patients. All patients had a full recovery, but one patient developed optic neuropathy and lost his vision.
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