Updated

Updated · NBC San Diego · Jul 10

San Diego County Warns of MDR-TB Exposure at CSU San Marcos, With 4 Sprinter Dates Listed

Updated

Updated · NBC San Diego · Jul 10

San Diego County Warns of MDR-TB Exposure at CSU San Marcos, With 4 Sprinter Dates Listed

Q: Why must officials issue broad alerts instead of using technology to directly notify those exposed on a public train?

Officials issue broad alerts because, on a public train, they usually do not know exactly who was there or how to reach them. Unlike an airline, a commuter rail line typically has no complete passenger manifest with names, phone numbers, or email addresses for every rider. Many people pay in ways that do not reliably identify them, and even when some data exists, it may not show who was actually in the same car or exposed long enough to matter. With tuberculosis, that detail is important because risk depends heavily on proximity, ventilation, and duration of contact. Technology also cannot determine exposure with medical precision. TB is airborne, but infection is not instant or certain. Officials can identify a time window and location, as San Diego County did for the Sprinter, but they cannot use phone or transit data to prove who inhaled infectious particles. That is why public health agencies rely on exposure windows and ask people to self-identify. Privacy law is another barrier. Health departments can warn the public, but directly linking transit records, location data, and a person’s possible disease exposure raises legal and ethical limits, especially without prior consent or a formal system built for that purpose. So broad alerts are the practical public-health tool: they cast the widest net, protect privacy, and prompt people who may have been exposed—especially those with symptoms or weakened immune systems—to seek screening quickly.

1 articles · Updated · NBC San Diego · Jul 10

Dec. 15, 2025, to May 14, 2026 marks the potential multidrug-resistant tuberculosis exposure window at California State University San Marcos, San Diego County said Friday.
Four Sprinter dates — May 18, 20, 26 and 27 — were also flagged for brief eastbound exposures between Melrose Drive and Civic Center-Vista stations, though officials said short transit contact is less likely to spread infection.
MDR-TB does not respond to standard medications, making treatment longer and more complex, but county health officials said it remains treatable and urged anyone potentially exposed to seek screening quickly.
247 active TB cases were reported in San Diego County in 2024, up from 193 in 2020; MDR-TB remained rarer, with three cases in 2024 and two in 2025.

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NBC San Diego1d ago

San Diego County: MDR-TB Exposure at CSU San Marcos, NCTD Sprinter

With TB cases rising for years, is San Diego's public health strategy failing to stop drug-resistant strains from spreading?

What does the grueling and expensive 20-month treatment for multidrug-resistant TB actually involve for a patient?

Why must officials issue broad alerts instead of using technology to directly notify those exposed on a public train?

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1 total

NBC San Diego1d ago

San Diego County: MDR-TB Exposure at CSU San Marcos, NCTD Sprinter

San Diego County Warns of MDR-TB Exposure at CSU San Marcos, With 4 Sprinter Dates Listed

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