Summary of SYMHC Classics: Scarlet fever

Overview of SYMHC Classics: Scarlet Fever

This Stuff You Missed in History Class episode traces the history of scarlet fever—from its earliest descriptions and 19th-century deadly outbreaks to modern-day resurgences. Hosts Tracy V. Wilson and Holly Frey explain how the disease was long feared as a major childhood killer, how medical understanding of it evolved, and why it still appears in headlines today despite being treatable with antibiotics.

What Scarlet Fever Is

• Scarlet fever is caused by group A Streptococcus bacteria.
• It typically begins with:
  • fever
  • sore throat
  • headache
  • nausea or vomiting
• A distinctive rash usually appears a day or two later:
  • often red and sandpapery on lighter skin
  • may look darker or less visibly red on brown or Black skin
• Another classic sign is a “strawberry tongue”: a white-coated tongue that can become red and bumpy.

Why it can be dangerous

If untreated, scarlet fever and related strep infections can lead to:

• organ damage
• rheumatic fever
• nephritis/kidney inflammation
• invasive, potentially deadly strep infections

Historical Origins and Early Descriptions

• The hosts note that strep bacteria existed long before scarlet fever was clearly identified, but scarlet fever itself likely emerged when certain strep strains gained toxin-producing ability through a bacteriophage (a virus that infects bacteria).
• Early references to fever-and-rash illnesses appear in ancient medical writing, but it’s often impossible to know whether those texts describe scarlet fever or another disease.
• Clearer descriptions begin in the 16th century:
  • Giovanni Filippo Ingrassia described roselia in 1553.
  • Johan Bär added the sore-throat connection in 1565.
  • Jean Cotier and Daniel Sennert later described classic symptoms such as rash, peeling skin, and complications.

Thomas Sydenham’s 17th-century account

• Sydenham described scarlet fever as a disease that often spread through families, especially children.
• He observed the peeling skin that can follow infection and recommended treatment based on the medical ideas of the time.
• His approach avoided some more aggressive practices like bloodletting, but still included outdated remedies such as laxatives, blisters, and opium tincture in severe cases.

Why Scarlet Fever Became So Feared in the 19th Century

• Scarlet fever outbreaks became much more severe in the 1820s and 1830s.
• By around 1840, it was a leading cause of childhood death in parts of the U.S. and Europe.

Possible reasons for the rise

The episode lays out several theories:

• Urban crowding and poor sanitation made spread easier.
• Malnutrition, possibly linked to wheat prices, may have made children more vulnerable.
• A more virulent strain may have evolved.
• The disease was also introduced into new regions through colonization and global movement.

Places where scarlet fever appeared later

• Madeira: 1806
• South America: 1829
• Greenland: 1847
• Australia and New Zealand: 1848
• California: 1849

Public health impact

The fear of scarlet fever helped drive:

• quarantine measures
• school closures
• disinfection campaigns
• the development of public health systems

Key Scientific Breakthroughs

Connecting strep and scarlet fever

• In 1836, Richard Bright linked scarlet fever to later kidney disease.
• In 1867, Dr. Michael Taylor traced a scarlet fever outbreak to contaminated milk.
• In 1874, Theodor Billroth identified and named Streptococcus.
• In 1884, Friedrich Julius Rosenbach named Streptococcus pyogenes.

Milk as a transmission source

• Emanuel Klein later argued that scarlet fever could spread through infected cows and milk.
• His work was significant because it suggested that destroying contaminated milk alone might not be enough.
• These findings contributed to the eventual push for pasteurization.

The toxin and bacteriophage connection

• In the 1910s and 1920s, researchers discovered:
  • bacteriophages
  • the toxin that causes scarlet fever symptoms
  • tests to determine susceptibility
• George and Gladys Dick confirmed the bacterial cause and identified the scarlet fever toxin.
• Their Dick test helped show whether someone was susceptible.

Treatment: From Isolation to Antibiotics

• Early control efforts relied heavily on:
  • isolation hospitals
  • quarantine
  • disinfection of clothing, bedding, books, and toys
• By the 1930s, sulfa drugs were used against strep infections.
• The major breakthrough came with penicillin, and later amoxicillin, which are still standard treatments today.

Important nuance

The episode emphasizes that:

• scarlet fever deaths were already declining before penicillin
• antibiotics helped dramatically
• but they do not fully explain the long-term drop in mortality

Modern Resurgence and Current Uncertainty

• Starting in the 1980s, invasive strep infections began rising again.
• Scarlet fever itself saw a major increase beginning around 2008 in parts of Asia, later spreading to the UK, Europe, and the U.S.
• The UK experienced a major spike in 2015.
• Globally, scarlet fever cases rose five-fold from 2011 to 2020, with a dip during COVID-19 mitigation periods.

What might be causing recent spikes?

The episode notes several hypotheses:

• changing patterns of exposure after pandemic restrictions
• a more aggressive toxin produced by the bacteria
• shifts in circulation of strep strains

But the hosts stress that:

• there is no credible evidence that COVID-19 vaccines or flu vaccines caused the rise
• current explanations remain speculative

Scarlet Fever in Literature and Culture

The hosts close by highlighting how often scarlet fever appears in classic literature and real family histories:

• Little Women: Beth’s scarlet fever is one of the novel’s most memorable and tragic plot points.
• The Little House books: Laura Ingalls Wilder used scarlet fever as part of Mary’s fictionalized illness/blindness story.
• The von Trapp family: scarlet fever affected the family before the events that led to the Trapp Family Singers and inspired The Sound of Music.
• The Velveteen Rabbit: the boy’s scarlet fever leads to the feared burning of his toys, making the story much darker than many remember.

Main Takeaways

• Scarlet fever is not a “returned” disease, but one that has recurred in outbreaks for centuries.
• Its history helped shape:
  • infectious disease science
  • bacteriology
  • pasteurization
  • public health systems
• Although it is usually treatable today, it still matters because:
  • strep infections remain common
  • outbreaks can still happen
  • invasive complications can be serious
• The episode also highlights how deeply scarlet fever has entered cultural memory through children’s literature and historical storytelling.