LA Medical Office Finds Dangerous Bacteria After Worker Tests Positive for Airborne Illness

WHO:

Yahoo - One Los Angeles County employee tested positive for Legionnaires’ disease; the employee’s identity and condition were not disclosed.

Yahoo - The Los Angeles County Department of Public Health was notified of the employee’s positive test, according to a department spokesperson speaking to NBC.

Yahoo - A spokesperson for the Los Angeles County Department of Medical Examiner declined to answer questions and referred inquiries to the Department of Public Health.

Yahoo - County health officials said healthcare providers must report “symptomatic cases” and that public health authorities monitor high-risk settings.

NY Post - The article reported that legionella was detected in the medical examiner’s office cooling system.

WHAT:

Yahoo - Legionella, the bacteria that causes Legionnaires’ disease, was detected in a cooling system at the medical examiner’s office.

Yahoo - Officials have not publicly established whether the employee’s infection was connected to the contaminated system.

Yahoo - The county reported no additional cases involving people with shared exposure to the employee. Officials said, “To date, no additional cases have been identified with shared common exposures to this individual.”

Yahoo - Legionnaires’ disease is a serious form of pneumonia caused by Legionella bacteria and is usually treatable with antibiotics, according to the U.S. Centers for Disease Control and Prevention.

Yahoo - Symptoms can include fever, chills, headaches, coughing, and breathing difficulties; they generally emerge two to 14 days after exposure.

WHERE:

Yahoo - The bacteria was found at the Los Angeles County Department of Medical Examiner’s Office near downtown Los Angeles.

NY Post - The bacteria was detected in a cooling system at the office near downtown Los Angeles.

WHEN:

Yahoo - The bacteria was found during maintenance work in May 2026.

Yahoo - Employees in affected buildings were notified later in 2026.

WHY:

Yahoo - People can contract the disease by breathing in contaminated water droplets or mist, which can come from cooling equipment or building plumbing systems.

Yahoo - County officials described Legionella as “commonly found in building plumbing systems, especially in older buildings.”

HOW:

Yahoo - Legionnaires’ disease does not typically spread directly between people; contaminated water systems can release airborne droplets carrying the bacteria.

(UPDATED October 22, 2026 08:08 UTC)

A Los Angeles County employee has tested positive for Legionnaires’ disease, while Legionella bacteria were detected in a cooling system at the county medical examiner’s office near downtown Los Angeles. Officials have not established whether the employee’s infection was connected to the contaminated system, and they have identified no other cases involving people with shared exposure. The bacteria was found during maintenance work, and employees in affected buildings were notified later. Legionella can spread when people breathe in contaminated water droplets or mist released by cooling equipment or plumbing systems. The disease does not usually pass directly from person to person. It is a serious form of pneumonia that is generally treatable with antibiotics. Symptoms may include fever, chills, headache, cough and difficulty breathing, usually appearing two to 14 days after exposure. County officials say healthcare providers must report symptomatic cases, and public health authorities monitor high-risk settings.