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Home > All Images > 1987 > August > 17 Aug 1987

Images Dated 17th August 1987

Choose from 7 pictures in our Images Dated 17th August 1987 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Coloured TEM of Yersinia pestis bacteria Featured 17 Aug 1987 Print

Coloured TEM of Yersinia pestis bacteria

False colour transmission electron micrograph (SEM) of Yersinia pestis, a species of Gram negative, non- motile, capsulated, aerobic bacilli (oval/rod- shaped bacteria) that is the causative agent of bubonic plague (the Black Death of the Middle Ages) in humans. The bacteria are primarily flea- carried pathogens of rats. Transfer to man occurs when a flea is obliged to leave its dead rodent host (often because its feeding apparatus is blocked by multiplying bacteria and it is starving) and suck human blood. Infection is rapid, featuring swelling (bubo) of lymph nodes and leading to septicaemia and pulmonary infection. Magnification: X 10, 500 at 35mm size

© CNRI/SCIENCE PHOTO LIBRARY