2 doctors weighed in:

What causes scarlet fever and what are the symptoms?

2 doctors weighed in
Dr. James Ferguson
Pediatrics

In brief: Strep A + gene

Group a streptococcus is cause of throat & skin infections.
It is acquired from contaminated fingers or contact with oral secretions of a source case. Some people carry it without getting infected year round. Some strains have additional genes that code for making a toxin that spreads thru the blood & gives a red, sandpaper & sunburn like rash starting within 12 hrs of the fever.

In brief: Strep A + gene

Group a streptococcus is cause of throat & skin infections.
It is acquired from contaminated fingers or contact with oral secretions of a source case. Some people carry it without getting infected year round. Some strains have additional genes that code for making a toxin that spreads thru the blood & gives a red, sandpaper & sunburn like rash starting within 12 hrs of the fever.
Dr. James Ferguson
Dr. James Ferguson
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Dr. John Leander Po
Internal Medicine - Infectious Disease

In brief: S. pyogenes bacteria

Streptococcus pyogenes is the bacteria responsible for causing scarlet fever.
Also known as "group a strept" (gas), the bacteria is also known as the "flesh-eating bacteria", causing severe soft tissue infections such as "necrotizing fasciiitis". The bacteria produces toxins that is responsible for many of its symptoms such as fever, a bright intense red rash, profound weakness and malaise.

In brief: S. pyogenes bacteria

Streptococcus pyogenes is the bacteria responsible for causing scarlet fever.
Also known as "group a strept" (gas), the bacteria is also known as the "flesh-eating bacteria", causing severe soft tissue infections such as "necrotizing fasciiitis". The bacteria produces toxins that is responsible for many of its symptoms such as fever, a bright intense red rash, profound weakness and malaise.
Dr. John Leander Po
Dr. John Leander Po
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