Table 3.

Vaginal and rectal occurrence of Lactobacillus species, expressed as percentage of subjects positive, according to different studies

Authors	Population studied	Species	Vagina only	Vagina alla	Vagina & Rectum	Rectum only	Rectum alla	Overall
Antonio et al. 1999	302 sexually active women	L. crispatus	32
		L. jensenii	23
		L. gasseri	5
		L. iners	15
		L. vaginalis	< 1
Antonio et al. 2005	290 nonpregnant women	L. crispatus	17	31	14	1	15	33
		L. jensenii	17	23	6	4	10	27
		L. gasseri	3	5	2	8	10	13
		L. iners	15	16	1	0	1	16
		L. vaginalis	< 1	0	0	0	0	0
Marrazzo et al. 2009	237 women having sex with women	L. crispatus	49	93	44	5	49	98
		L. jensenii	8	10	2	1	3	11
		L. gasseri	10	16	6	6	12	21
		L. iners	1	1	0	0	0	1
		L. vaginalis	0	0	0	0	0	0
This study	132 pregnant women	L. crispatus	33	41	8	3	11	42
		L. jensenii	21	32	11	2	13	33
		L. gasseri	18	30	12	3	15	33
		L. iners	11	11	0	2	2	12
		L. vaginalis	10	10	0	0	0	10

a: The column entitled 'Vagina all' presents the sum of subjects with the species in the vagina only and those with the species in both vagina and rectum. The column entitled 'Rectum all' presents the sum of subjects with the species in the rectum only and those with the species in both vagina and rectum.