TABLE 2.

Incidence of seroconversions suggesting acute C. pneumoniae infection and the annual prevalences of IgG and IgA antibodies among Oulu personnel

Assay and yearNo. of subjectsNo. of acute infectionsaPerson-yearsIncidenceb% Prevalence by antibody
IgGIgA
MIF
    9421NA05710
    95341214.87124
    96361323.17225
    97371352.96816
    98292296.96214
    99282287.16414
EIA
    9421NA06738
    95342345.97950
    96361362.87842
    973743710.87841
    982802807136
    99281283.67550
Total
    MIF71454.8
    EIA81445.6
  • a NA, not applicable.

  • b Rate per 100 person-years at risk.