Figure 3From: Heavy metal exposure reverses genetic resistance to Chlamydia-induced arthritisThe effect of prior exposure to mercuric chloride (HgCl2) on serum IgE levels in Chlamydia-induced arthritis. The serum IgE levels are significantly increased compared with controls (P < 0.0001) (n = 8 in each group). O.D., optical density.Back to article page