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And if you go, is the employee at checkout yawning because of fatigue or the bubonic plague?

That doesn’t include the cost of the diseases the animals spread, such as hantavirus, murine typhus and bubonic plague, nor the mental health toll of living among them.

But apart from family dynamics, Saklatvala was also deeply influenced by the devastation caused by the bubonic plague in Bombay in the late 1890s.

Cockroaches carry a wide range of diseases and pathogens including bubonic plague, dysentery, hepatitis, hookworms, leprosy, salmonella and polio.

Madagascar is one of the last places where outbreaks of human bubonic plague still happen regularly.