Historical Diseases in Early Plymouth and American Plantations: Epidemics That Shaped Colonial America

Early European settlers (1620s onward) and enslaved Africans faced devastating epidemics due to novel pathogens, malnutrition, crowding, and poor sanitation.

Major Infectious Diseases

1. Smallpox (Variola major): High mortality (30%+), scarring, blindness. Devastated Native Americans (no immunity).
2. Measles: Highly contagious; pneumonia, encephalitis complications.
3. Yellow Fever: Aedes aegypti vector; urban epidemics in coastal cities (Philadelphia 1793, New Orleans). Jaundice, hemorrhage, "black vomit."
4. Malaria (Ague): P. vivax, P. falciparum; endemic in tidal/riverine areas. Chronic debility.
5. Typhoid Fever: Salmonella Typhi; fecal-oral via contaminated water. Prolonged fever, rose spots, intestinal perforation.
6. Dysentery (Bloody Flux): Shigella, Entamoeba histolytica; severe diarrhea, dehydration, high case fatality.
7. Tuberculosis (Consumption): Airborne; chronic cough, wasting, hemoptysis. Leading cause of death 18th–19th century.
8. Cholera: Vibrio cholerae; pandemics 1832, 1849, 1866. Rice-water stool, rapid dehydration death.
9. Scarlet Fever: Streptococcus pyogenes; sandpaper rash, strawberry tongue, post-strep sequelae (rheumatic fever, glomerulonephritis).
10. Influenza: Seasonal epidemics; 1918 pandemic devastated communities.

Mortality was highest among children, elderly, and immunologically naïve Indigenous populations. These diseases shaped demographic, social, and economic trajectories.