TABLE 3.

Median levels of IgG and IgM to L. pneumophila in male employees working at different sites on the industrial premises, as determined by ELISA

WorkplaceNo. of employeesMedian IgG value (U/ml)Median IgM value (U/ml)
Air scrubber3412.515.5
Biological treatment plant2114a17b
Combustion plant71417
Other sites at main premises1081111
Plant 2 km away2210.510.5
All workplaces1921212
  • a Significantly higher than for those working at other sites on the main premises (P = 0.034) or 2 km away (P = 0.028).

  • b Significantly higher than for those working at other sites on the main premises (P = 0.013) or 2 km away (P = 0.046).