Washington: An Indian woman with a rare deadly form of tuberculosis has created a health scare in three US states where authorities are tracking down hundreds of people who may have been in her contact during her visit.

The woman, who arrived in Chicago from India on April 4 and travelled by car to visit relatives in Illinois, Tennessee and Missouri, is now being treated at the National Institutes of Health (NIH) Clinical Center in Bethesda, Maryland. She is suffering from an extremely rare drug-resistant form of the disease, known as XDR-TB, which is immune to most Tuberculosis drugs, The New York time reported.