Reactivation of Chlamydia pneumoniae infection in mice by cortisone treatment.
K Laitinen, A L Laurila, M Leinonen, and P Saikku
National Public Health Institute, Helsinki, Finland.
Infect Immun. 1996 April; 64(4): 1488–1490
Reactivation of Chlamydia pneumoniae infection was studied by inducing immunosuppression by cortisone acetate treatment given every other day for 14 days in intranasally infected NIH/s mice. The treatment started 2 or 4 weeks after primary infection, when no C. pneumoniae was detected. C. pneumoniae could be recovered from the lung cultures on days 7 and 9 in 10 and 60% of the mice, respectively, when cortisone treatment was begun 30 days after infection. These results confirm the persistent nature of C. pneumoniae infection.