Plaguecarrying fleas found in Arizona

The plague, also known as the Black Death, is caused by a bacterium called Yersinia pestis and is spread by lea bites. The bacteria was responsible for killing around 60 per cent of the European population in the 1300s. This month, health authorities in Arizona have reported two counties with leas testing positive for the bacterium.
Is this anything to worry about? Probably not, because we can treat the disease easily these days. But it
does serve as a reminder that these ancient bacteria are still present in our world and we need to monitor them and
be vigilant to prevent outbreaks.


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