TABLE 8.

Geometric mean endpoint titers obtained by three C. pneumoniae MIF assays for sera from patients with (groups I and II) and without (group III) acute respiratory tract infectionsa

MIF testTiter
Groups I and IIGroup III
IgMIgGIgAIgGIgA
WRF1731167511359
MRL15913110211470
LAB491145NDNDND
  • a Numbers of C. pneumoniae antibody-positive sera were as follows: groups I and II, IgM ≥ 16, 32 (WRF), 29 (MRL), and 32 (LAB); IgG ≥ 64, 54 (WRF), 63 (MRL), and 57 (LAB); IgA ≥ 32, 47 (WRF) and 39 (MRL); group III, IgG ≥ 64, 43 (WRF), and 43 (MRL); IgA ≥ 32, 45 (WRF) and 51 (MRL). ND, not done.