The Centers for Disease Control and Prevention now wants the 17 people who were seated near the infected man to be tested for the disease.
TB is spread through the air.
However, CDC spokeswoman Shelly Diaz said the risk of transmission is low and that this is a "cautionary move".
The infected passenger is being kept in isolation at Annapolis Hospital in Dearborn, Michigan.
Diaz said details about the sick passenger weren't being released.
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