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Infection and Immunity, December 2000, p. 7156-7158, Vol. 68, No. 12
National Public Health
Institute,1 Pohja Military
Hospital,4 and Department of
Microbiology, University of Oulu,3 Oulu, and
Lapland Air Command, Rovaniemi,2 Finland
Received 26 May 2000/Returned for modification 12 July
2000/Accepted 13 September 2000
The development of Chlamydia pneumoniae-specific
cell-mediated immunity was studied during a primary C. pneumoniae infection. The immune response was detected as
positive lymphocyte proliferation and secretion of interferon gamma.
C. pneumoniae-induced activation of both CD4+
and CD8+ T cells was detected in the early phase of
infection, but activation of only CD4+ T cells was detected
in the later stage.
0019-9567/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Cell-Mediated Immune Response during Primary
Chlamydia pneumoniae Infection

*
Corresponding author. Mailing address: National Public
Health Institute, Box 310, 90101 Oulu, Finland. Phone: 358-8-5376232. Fax: 358-5376222. E-mail: helja-marja.surcel{at}ktl.fi.
Present address: Labsystems Research Laboratories, Labsystems Oy,
00811 Helsinki, Finland.
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