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Antibiotic administration affects splenic iNOS mRNA. A. The mean level of iNOS mRNA was increased in the spleen immediately after SDR († indicates p = .07). This increased mean level was not evident in the antibiotic treated mice exposed to SDR. B. Antibiotic treatment reduced iNOS mRNA in the spleen regardless of whether mice were in the SDR + 15 hr or HCC + 15 hr group. * indicates main effect for antibiotic administration, p< .05. n = 9 per group.
