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Numbers of CD4+ αβ T cells in LPL ileum sections. The number of CD4+ αβ T cells per mm2 of lamina proprium (plus the SE), as determined by immunohistochemistry, is shown for sections of ileum derived from cows from the control (n = 5), shedder (n = 6), and clinical (n = 6) groups. Letters above columns indicate the result of the statistical analysis. Columns that do not share letters are significantly different (P < 0.05).
