Table 1.

Experimental groups testing the effect of antibiotic-disrupted resident microbiomes on Mycoplasma gallisepticum (MG) virulence.

	Sham	MG
No Antibiotics (Control)	N = 10 (6:4)	N = 10 (6:4)
Short Antibiotics (Pre-MG only)	N = 10 (5:5)	N = 10 (5:5)
Long Antibiotics (Pre + Post-MG)	N = 10 (5:5)	N = 10 (5:5)

Sex ratios listed as (male:female). All birds in the “MG” treatments were confirmed naïve to the pathogen at capture (see Supplement).