Deadly Outbreak of Flesh-Eating Bacteria in Japan
Spread of Streptococcal Toxic Shock Syndrome (STSS)

The deadly outbreak of a “flesh-eating bacteria” is rapidly spreading across Japan, alarming health officials with its quick progression towards death.
Close to 1,000 cases of Streptococcal toxic shock syndrome (STSS) have been reported in Japan this year, with symptoms proving fatal within 48 hours.
As of June 2, Japan has recorded 977 STSS cases, surpassing last year’s total within the first half of 2024, according to the National Institute of Infectious Diseases in Japan.
Tokyo has been severely impacted by this outbreak, with 145 cases reported in the first six months of this year. Most cases are seen in adults over 30, with a death rate of approximately 30 percent.
This disease is caused by Group A Streptococcus (GAS), the same bacteria responsible for strep throat in children. Certain strains of this bacteria can rapidly develop symptoms like fever, low blood pressure, limb pain, and swelling, leading to necrosis, organ failure, breathing difficulties, and death if left untreated.
Insight from Professor Ken Kikuchi
Professor Ken Kikuchi, an expert in infectious diseases at Tokyo Women’s Medical University, expressed concern over the rapid progression of this disease. He warns that individuals could die within 48 hours of noticing symptoms, such as swelling in the foot that can quickly spread to the knee.
Warning of a potential increase in cases, Kikuchi predicts that Japan may see more than 2,500 cases this year, with those over 50 being particularly vulnerable. Prompt medical attention and treatment, including high-dose IV antibiotics and supportive care, are critical in managing STSS.
Prevention and Protection
To safeguard against GAS and STSS, the National Institute of Infectious Diseases advises good hygiene practices, prompt treatment of bacterial infections, and vigilant monitoring of skin wounds, cuts, or infections.
Individuals with open wounds, recovering from surgeries, or dealing with viral infections that cause sores are at increased risk for STSS, according to the U.S. Centers for Disease Control (CDC).
Moreover, the Public Health Agency of Canada has identified invasive Group A Streptococcus (iGAS) disease activity as a priority for monitoring and control, given the heightened infection rates observed post-pandemic.
Several other countries worldwide have reported an uptick in GAS and iGAS infections, indicating a concerning trend post the COVID-19 pandemic.
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