SACRAMENTO (CBS13) – County health officials confirm that a Sacramento-area high school student has been diagnosed with active tuberculosis.

According to the Sacramento County Health and Human Services, the student attends Florin High School. Officials have already sent off a letter to parents alerting them about the case.

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“Public Health is working closely with school officials to proactively investigate and screen any potential exposures,” said Sacramento County Public Health Officer Dr. Olivia Kasirye in a statement released Saturday.

Health officials note that for someone to become infected with TB, they must be in close and prolonged contact with a person with active tuberculosis.

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Only students and staff who shared a classroom with the student diagnosed with active TB will be screened and tested in the coming days, health officials say.

“We want to focus first on those in the same classrooms as the diagnosed student, so that we can quickly evaluate them and provide preventive treatment,” Kasirye said.

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The infected student has been isolated at home and is not considered a further exposure risk.