Two federal buildings in downtown San Diego that house courthouses and a daycare recently tested positive for the Legionella bacteria. The bacteria, which lives in water droplets and commonly grows in cooling towers, can cause Legionnaires’ disease, a serious type of pneumonia the CDC says will kill about one in 10. Team 10 has learned Legionella was found in 13 out of 15 samples taken at the James M. Carter and Judith N. Keep U.S. Courthouse. Next door in the Edward J. Schwartz Federal Building and United States Courthouse, 24 out of 46 samples were positive for Legionella, Christi Chidester Votisek, a spokesperson for the U.S. General Services Administration, said.