"Public health officials in Northern California are investigating a tuberculosis outbreak, identifying more than 50 cases at a private Catholic high school and ordering those who are infected to stay home. The outbreak comes as tuberculosis cases have been on the rise statewide since 2023. The San Francisco Department of Public Health issued a health advisory last week after identifying three active cases and 50 latent cases of tuberculosis at Archbishop Riordan High School in San Francisco."
"A person with active TB can develop symptoms and is infectious; a person with a latent tuberculosis infection cannot spread the bacteria to others and doesn't feel sick. However, a person with a latent TB infection is at risk of developing the disease anytime. The three cases of active TB have been diagnosed at the school since November, according to public health officials. The additional cases of latent TB have been identified in people within the school community."
Public health officials identified more than 50 tuberculosis cases tied to Archbishop Riordan High School in San Francisco, including three active cases and 50 latent infections. Active TB can cause symptoms and be infectious; latent TB cannot be transmitted and is asymptomatic but may progress to active disease later. The three active cases were diagnosed since November, and additional latent infections were found among people in the school community. School officials canceled in-person classes, plan to resume Feb. 9, will use temporary hybrid learning until Feb. 20, and will permit students who test negative to return. Health officials say the general population risk is low while testing, contact tracing, and isolation focus on the school community.
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