Seven cooling towers in the South Bronx have tested positive for live Legionella bacteria, city officials said Wednesday as they continue to investigate a Legionnaires' disease cluster that has killed two people.

The seven are among 10 sites where previous PCR tests indicated the presence of Legionella — but the earlier tests can’t distinguish between live and dead bacteria. Only live bacteria can cause the disease.

Culture tests for live bacteria at the remaining three towers, including at Yankee stadium, are still pending, health officials said.

At least 23 people have tested positive amid the South Bronx outbreak, the Department of Health and Mental Hygiene said as of Wednesday. Three people remained hospitalized.

The South Bronx cases follow another outbreak that hit Manhattan’s Upper East Side earlier in the summer. The UES outbreak sickened 94 people and killed 11, making it the deadliest outbreak since 2015.

All 10 of the South Bronx towers where PCR tests indicated Legionella had been cleaned and disinfected as of last week as part of what city officials called an “aggressive response” to the latest outbreak.

“Our community health workers have been on the ground since we launched this investigation, speaking with more than 3,200 people, distributing more than 8,800 informational flyers, and reaching out to more than 280 organizations and businesses in the area,” health department Commissioner Alister Martin said in a statement. “We will continue to move with urgency and keep New Yorkers informed as this investigation unfolds.”

The city health department said culture tests confirmed live bacteria at the following locations:

  • 820 Concourse Village West
  • 470 E. 161st St.
  • 1265 Franklin Ave.
  • 567 Melrose Ave.
  • 3339 Park Ave.
  • 1160 Teller Ave.
  • 890 Washington Ave.

Culture tests were still pending at:

  • 234 E. 149th St.
  • 1 E. 161st St.
  • 1085 Washington Ave.

Health officials advise anyone who lives or has recently visited ZIP codes 10451, 10455, 10456 or 10459 and has developed flu-like symptoms to seek medical attention immediately.