One month after spraying, there was no appreciable change in IgG results but significant J-WS specific IgE titers were demonstrated in 5 of 16 skin- test-positive high-exposure workers. Although there was not a correlation between skin test positivity and the cut-off level of J-WS-specific IgE [? mean + 3 SD (0.18) of a pool of 14 nonexposed urban control sera], there was a definite trend to rising specific IgE anti- body titers 1 month after exposure.
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Immune responses in farm workers after exposure to Bacillus thuringiensis pesticides.
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