Microbe of the Week
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Microbe of the Week. Salmonella typhi Gram-negative, motile, mesophilic enteric bacterium Causative agent of typhoid fever (aka “enteric fever”. Microbe of the Week. Salmonella typhi Gram-negative, motile, mesophilic enteric bacterium Causative agent of typhoid fever (aka “enteric fever”.

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Microbe of the Week

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Microbe of the week

Microbe of the Week

  • Salmonella typhi

    • Gram-negative, motile, mesophilic enteric bacterium

    • Causative agent of typhoid fever (aka “enteric fever”


Microbe of the week

Microbe of the Week

Salmonella typhi

Gram-negative, motile, mesophilic enteric bacterium

Causative agent of typhoid fever (aka “enteric fever”


Microbe of the week

Microbe of the Week

Salmonella typhi

Gram-negative, motile, mesophilic enteric bacterium

Causative agent of typhoid fever (aka “enteric fever”


Microbe of the week

Sources

  • Humans are sole reservoir (does not infect animals)

  • Carriers may harbor the organism in their gall bladder

  • Contaminated food – by handlers (milk, sandwiches, meat, cake!)

    • or …

  • Contaminated water – e.g. shellfish in polluted waters

  • Organism survives in shellfish up to 4 days, sea water up to 9 days, for weeks in sewage

  • Transmission: mainly from water contaminated with human waste or human carriers


Microbe of the week

Typhoid Mary

Sociological implications of infectious disease

  • Typhoid Mary's real name was Mary Mallon.

  • Irish immigrant who made her living as a cook

  • Mallon was the first person found to be a "healthy carrier" of typhoid fever in the United States.

    • She herself was not sick – but over 30% of the bacteria in her feces were S. typhi

  • Mallon is attributed with infecting 47 people with typhoid fever, three of whom died.

  • Interred on a N. Brother Island, NY for 26 years

    • 1907-1910

    • 1915- till her death in 1938


Microbe of the week

Typhoid Mary

Sociological implications of infectious disease

  • Typhoid Mary's real name was Mary Mallon.

  • Irish immigrant who made her living as a cook

  • Mallon was the first person found to be a "healthy carrier" of typhoid fever in the United States.

    • She herself was not sick – but over 30% of the bacteria in her feces were S. typhi

  • Mallon is attributed with infecting 47 people with typhoid fever, three of whom died.

  • Interred on a N. Brother Island, NY for 26 years

    • 1907-1910

    • 1915- till her death in 1938


Microbe of the week

Typhoid Mary

Sociological implications of infectious disease

  • Typhoid Mary's real name was Mary Mallon.

  • Irish immigrant who made her living as a cook

  • Mallon was the first person found to be a "healthy carrier" of typhoid fever in the United States.

    • She herself was not sick – but over 30% of the bacteria in her feces were S. typhi

  • Mallon is attributed with infecting 47 people with typhoid fever, three of whom died.

  • Interred on a N. Brother Island, NY for 26 years

    • 1907-1910

    • 1915- till her death in 1938


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