FIG. 1.

Campylobacter jejuni plate counts from trial 2. Six treatments are represented: poults that received no adult cecal content (UC), poults that received adult cecal contents only (IC), and poults that received both cecal contents and therapeutic levels of one antibiotic, either virginiamycin (VIR), enrofloxacin (ENR), neomycin (NEO), or vancomycin (VNC). C. jejuni load was measured for four poults per treatment, with the exception of the VNC treatment (three poults). ANOVA generated an F statistic of 63.4 and a P value of <0.001. Tukey's least significant difference test identified two statistically significant groups (a and b), as noted above the data bars. Error bars indicate standard errors of the means.