Table 2.

Cross-reactivity of 62 C. pneumoniae-positive serum samples with titers of ≥32 withC. trachomatis- and C. psittaciEBsa

KitNo. (%) of serum samples
C. trachomatis IgG titer ≥ 32C. psittaci IgG titer ≥ 32C. trachomatis andC. psittaci IgG titers ≥ 32
MRL24 (38.7)9 (14.5)9 (14.5)
Labsystems30 (48.4)38 (61.3)28 (45.2)
  • a There was no statistically significant difference in cross-reactivity with C. trachomatis(P ≥ 0.05) . In contrast, the difference in cross-reactivity with C. psittaci alone and with bothC. psittaci and C. trachomatis was significant (P < 0.001) .