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Flesh-eating bug 'is going global'

A terrifying new strain of flesh-eating bug that kills one in four of those it invasively infects is spreading around the world, evidence suggests.

The group A streptococcus bacteria have caused a sharp rise in skin and throat infections in the UK over the past 17 years. In severe cases, the microbes can cause necrotising fasciitis - the "flesh-eating" condition which destroys body tissue - pneumonia and blood poisoning.

Around a quarter of people who suffer an invasive infection do not survive.