Table 2.

Effects of Bacitracin, Neomycin, and Penicillin V on PCC frequency (Hz).

Antibiotic	Concentration (mg/ml)	Segment	Krebs	Treatment	P (t-test)	n
Bacitracin	0.43	Colon	0.011 ± 0.003	0.010 ± 0.003	0.013	16
	0.43	Jejunum	0.01 ± 0.002	0.011 ± 0.002	0.839	16
	1.42	Colon	0.009 ± 0.002	0.011 ± 0.003	0.037	20
	1.42	Jejunum	0.013 ± 0.002	0.012 ± 0.002	0.373	20
	4.27	Colon	0.012 ± 0.003	0.013 ± 0.003	0.055	20
	4.27	Jejunum	0.031 ± 0.029	0.019 ± 0.009	0.084	20
	14.23	Colon	0.009 ± 0.004	0.009 ± 0.004	0.89	20
	14.23	Jejunum	0.018 ± 0.009	0.024 ± 0.014	0.208	20
Neomycin	0.27	Colon	0.01 ± 0.004	0.009 ± 0.003	0.098	16
	0.27	Jejunum	0.011 ± 0.005	0.012 ± 0.003	0.667	16
	0.91	Colon	0.009 ± 0.002	0.011 ± 0.003	0.027	16
	0.91	Jejunum	0.011 ± 0.003	0.009 ± 0.002	0.007	16
	2.73	Colon	0.009 ± 0.003	0.011 ± 0.002	0.093	16
	2.73	Jejunum	0.009 ± 0.003	0.011 ± 0.002	0.037	16
	9.09	Colon	0.008 ± 0.002	0.006 ± 0.003	0.164	16
	9.09	Jejunum	0.011 ± 0.004	0.024 ± 0.046	0.201	16
Penicillin V	1.17	Colon	0.008 ± 0.003	0.007 ± 0.003	0.237	20
	1.17	Jejunum	0.015 ± 0.009	0.015 ± 0.007	0.873	20
	3.88	Colon	0.009 ± 0.002	0.012 ± 0.002	0.003	16
	3.88	Jejunum	0.009 ± 0.002	0.009 ± 0.003	0.709	16
	11.65	Colon	0.008 ± 0.004	0.008 ± 0.005	0.696	20
	11.65	Jejunum	0.015 ± 0.006	0.008 ± 0.003	0.002	16