The plague

The plague: Yersinia pestis Laura Brennan, Hayley Gibbins, Kirsty Heath, and Sabrina Ul-Hasan http://www.sciencephoto.com/media/11356/enlarge

[object Object],[object Object],[object Object],[object Object],It is thought that this nursery rhyme has origins from plague. “Ring” refers to an early clinical sign that appears on the skin (perhaps the ulcer that commonly appears around a flea bite wound infected with Y. pestis ); “a pocket full of posies” refers to the use of flower petals as a means of warding off the stench and infection of a plague victim; “ashes, ashes” refers to dust to dust; and “all fall down” refers to victims who were falling down dead.

Yersinia pestis- The Anatomy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Yersinia pestis-The Anatomy ,[object Object],[object Object],[object Object],[object Object],[object Object]

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Types of plague ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Epidemiology-Host suseptibility

The plague

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The plague