Table 2.

Prevalence of EHS infections expressed as the number of PCR-positive composite fecal samples from room surveillance mice

	Facility (no. of rooms surveyed)
Infection status	A (14)	B (5)	C (19)	D (14)	E (3)	F (2)	Prevalence by species (%)
Genus level Helicobacter	0	1	7	8	0	0	28
H. hepaticus	0	0	7b,c,e,g	8b,c,e,f,h	0	0	26
H. bilis	0	1a	3a,g	5d,f,h	0	0	16
H. rodentium	0	1a	2a,b,c,e	4b,c,e,h	0	0	12
H. typhlonicus	0	0	4e,g	5d,e,f,h	0	0	16
H. mastomyrinus	0	0	2	0	0	0	4
Prevalence by facility (%)	0	20	47	64	0	0	not applicable

Infection status is represented via superscript as either one set of surveillance mice coinfected with ^aH. bilis and H. rodentium, ^bH. hepaticus and H. rodentium, ^cH. hepaticus and H. bilis, ^dH. bilis and H. typhlonicus, ^eH. hepaticus, H. rodentium, and H. typhlonicus, or ^fH. hepaticus, H. bilis, and H. typhlonicus or 2 sets of surveillance mice coinfected with ^gH. hepaticus, H. bilis, and H. typhlonicus or H. hepaticus, H. bilis, H. rodentium, and H. typhlonicus.