The seroprevalence of
Chlamydia pneumoniae
and
Mycoplasma pneumoniae
in hantavirus seronegative patients, who had symptoms and signs compatible with pneumonia was established. For this purpose we used the indirect fluorescent antibody test. Titers ≥ 1:16 for
C. pneumoniae and
M. pneumoniae were found in 8.6% and 17.1% of the serum, respectively, showing evidence of recent or current infection.
