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Table 3 IgE titers measured by P-K reaction against pollen in rats immunized three or four times

From: Elevated serum immunoglobulin E to Cryptomeria japonica pollen in rats exposed to diesel exhaust during fetal and neonatal periods

  Immunized three times Immunized four times
  n log2P-K IgE titers n log2 P-K IgE titers
Control 8 5.0 ± 1.0 8 6.0 ± 0.5
Total-C-C 8 7.5 ± 0.2 9 8.9 ± 0.2**
Filtered-C-C 8 7.4 ± 0.2 8 8.4 ± 0.3**
C-Total-C 8 5.6 ± 0.7 6 8.6 ± 0.3*
C-Filtered-C 7 5.4 ± 1.0 8 8.6 ± 0.3**
C-C-Total 7 2.0 ± 0.0 7 6.9 ± 0.1
C-C-Filtered 6 2.7 ± 0.4 6 5.8 ± 0.6
  1. Values are expressed as mean ± SD. Testosterone and estrogen levels on day 4 were pooled serum from males. * Different from Control, p < 0.05; ** different from Control, p < 0.01