Which of the following is NOT true about human plague (Yersinia pestis infection)? Painful swollen lymph nodes are called "buboes" Yersinia pestis infection of lymph nodes can sometimes spread to the lungs, causing secondary pneumonic plague Infected fleas' gastrointestinal tract is blocked by Y. pestis growth, causing them to regurgitate and infect a new host when they bite Usually acquired in the US from bites of fleas that have fed on infected urban rats None of the other four answers (All are true about human plague)

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