This text has been reconstructed from news coverage and may not reflect the exact original wording.
Southwestern
Drug-Resistant TB at a 20,000-Student Community College: The Hardest Case to Treat
Confirmed Threat
In April 2026, the San Diego County Tuberculosis Prevention and Care Program announced a potential exposure to multidrug-resistant tuberculosis (MDR-TB) at Southwestern Community College's main campus in Chula Vista. The exposure window spanned October 27 to December 14, 2025 -- most of the fall semester -- potentially affecting more than 20,000 students and staff who attended the Otay Lakes Road campus.
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Institution
Southwestern Community College
Community College · CA
~20,000 studentsSouthwestern College Health Notification
Confirmed Timeline
Alert Sequence
1 message in sequence
Some alert texts below are approximate reconstructions from news coverage, not confirmed verbatim transcripts. Reconstructed texts are shown in italic with a dashed border. Verified verbatim texts have a solid border and are marked accordingly.
INITIAL ALERTEmail
Approximate reconstructionReconstructed from San Diego County News Center official release and NBC 7, CBS 8, and Hoodline reporting909 chars
The San Diego County Tuberculosis Prevention and Care Program is announcing a potential exposure to multidrug-resistant tuberculosis (MDR-TB) at Southwestern Community College, 900 Otay Lakes Road, Chula Vista. The period of possible exposure was October 27 through December 14, 2025. MDR-TB is a type of tuberculosis that does not respond to standard first-line medications. The County is focused on people who shared frequent or extended indoor space with the identified case and will be offering TB testing, symptom checks, chest X-rays, and, when appropriate, preventive treatment. If you believe you may have been exposed, please call the County TB Prevention and Care Program at (619) 692-8621. Tuberculosis is an airborne disease spread when a person with active TB coughs, speaks, or breathes. Most people who are exposed do not develop active disease, but all identified contacts should be evaluated.
MDR-TB is a critical public health escalation over ordinary TB: standard medications (isoniazid and rifampin) are ineffective, requiring second-line drugs that take 18-24 months to complete treatment and carry more side effects.
The seven-week exposure window covering most of the fall 2025 semester meant that the potential contact population was very large -- up to 20,000 students and staff who attended the Otay Lakes campus during that period.
San Diego County has one of the highest TB incidence rates in California (247 active cases in 2024), partly due to proximity to the US-Mexico border and large immigrant communities from high-burden countries -- a structural risk factor for community college TB exposures.
Context
Background
Southwestern Community College's spring 2026 MDR-TB exposure notification was unusual in two respects: it involved multidrug-resistant tuberculosis -- the most treatment-challenging form of the disease -- and the potential contact population was extremely large, with more than 20,000 students and staff who attended the Chula Vista campus during the October-December 2025 exposure window. The San Diego County TB Prevention and Care Program managed the notification and follow-up, focusing contact tracing on individuals with frequent or extended indoor exposure to the index case. MDR-TB does not respond to the standard two-drug first-line regimen of isoniazid and rifampin; treatment requires second-line medications over 18-24 months. San Diego County reported 247 active TB cases in 2024, one of the highest rates in California -- a structural risk factor linked to the county's large population of recent immigrants from high-TB-burden countries and its proximity to the US-Mexico border. Community colleges in the region have faced repeated TB exposure notifications, reflecting their enrollment of students from communities with elevated TB incidence. Identified contacts were offered a comprehensive follow-up package: TB testing, symptom evaluation, chest X-rays, and preventive treatment where appropriate.
Analysis
Key Findings
MDR-TB -- tuberculosis resistant to the standard first-line drugs isoniazid and rifampin -- is significantly harder to treat, requiring 18-24 months of second-line medications
The fall 2025 semester exposure window (October 27 to December 14) potentially affected more than 20,000 students and staff at the Chula Vista campus
San Diego County's high TB incidence (247 cases in 2024) reflects structural risk factors including border proximity and large communities from high-burden countries -- elevating exposure risk at community colleges serving those populations
This was among several TB exposure notifications at San Diego-area community colleges in recent years, illustrating a pattern of elevated campus TB risk in the region
Outcome
County TB Prevention and Care Program managed direct outreach to identified close contacts, offering TB testing, symptom checks, chest X-rays, and preventive treatment where appropriate. MDR-TB does not respond to standard first-line medications and requires extended treatment regimens.
Provenance
Sources
- Official
- News
- News
- News
Tags
tuberculosistbmdr-tbmultidrug-resistantpublic-healthdisease-outbreakcommunity-collegecaliforniasan-diegochula-vistaexposure-notification
Added May 2026Updated May 2026Via ingestion