Antibiotic usage and persistence of Chlamydia pneumoniae carriage and symptoms over time among 40 cases of C. pneumoniae respiratory infection at a federal correctional facility. *Indicates chest radiography–confirmed pneumonia. Abbreviations: AC, symptomatic, cleared (real-time polymerase chain reaction [qPCR] negative); AP, symptomatic, persistent infection (or reinfection); D, doxycycline; NS, not specified; SC, symptomatic, cleared (qPCR negative); SP, symptomatic, persistent infection (or reinfection); Z, azithromyccin.