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Ms Macdonald has questioned the validity of the tests and says that they are returning false positives because he had been "primed" before them by being injected with bovine tuberculin.

Macdonald said she believes the test results returned a false positive because Geronimo had been given a tuberculin vaccine before testing, which led to antibodies in his system.

MacDonald believes the tests results returned a false positive because Geronimo had been given the tuberculin vaccine before testing with led to antibodies in his system.

The tuberculosis skin test requires an intradermal injection of liquid — 0.1 milliliter of a purified protein derivative called tuberculin — in the lower part of their arm, according to the Centers for Disease Control and Prevention.

Health officials are asking anyone who may have been in close contact with the student, including classmates, to accept a free tuberculin skin testing.