Table 4.

Dose effect: Prevalence of nasal MRSA colonization and Ascaris suum seropositivity by decreasing intensity of swine livestock exposure

Pathogen	Exposure categories	n	N	%	p‐Value*
MRSA, N = 261	>3 swine livestock visits/week	18	47	38.3	<.01
	>1–3 swine livestock visits/week	2	20	10.0
	>0–1 swine livestock visits/week	2	21	9.5
	0 swine livestock visit/week	13	173	7.5
A. suum, N = 248	>5 swine livestock visits/week	23	37	62.2	<.01
	>1–5 swine livestock visits/week	15	25	60.0
	>0–1 swine livestock visits/week	11	21	52.4
	0 swine livestock visit/week	60	165	36.4

^* p‐Value is calculated by using chi‐square test for trend.