Table 3.

H2O2 production by lactobacilli isolated from stool and vaginal specimens

SpeciesNo. of strains testedH2O2 productionNo. of isolates
StoolVaginaTotal (%)
MotherInfant
L. crispatus60Strongly positive465060 (100)
Weakly positive0000 (0)
Negative0000 (0)
L. gasseri44Strongly positive66618 (40.9)
Weakly positive561526 (59.1)
Negative0000 (0)
L. fermentum17Strongly positive4015 (29.4)
Weakly positive2114 (23.5)
Negative3148 (47.1)
L. paracasei subsp. paracasei8Strongly positive0000 (0)
Weakly positive0000 (0)
Negative5308 (100)
L. paracasei subsp. tolerans5Strongly positive0000 (0)
Weakly positive0000 (0)
Negative3205 (100)
L. plantarum7Strongly positive0000 (0)
Weakly positive0000 (0)
Negative4037 (100)
L. reuteri2Strongly positive1001 (50)
Weakly positive0000 (0)
Negative1001 (50)
L. rhamnosus3Strongly positive0000 (0)
Weakly positive1102 (66.7)
Negative1001 (33.3)
L. salivarius subsp. salicinius7Strongly positive1001 (14.3)
Weakly positive1203 (42.9)
Negative1113 (42.9)
L. salivarius subsp. salivarius10Strongly positive0303 (30)
Weakly positive0314 (40)
Negative3003 (30)
L. vaginalis9Strongly positive0044 (44.4)
Weakly positive0055 (55.6)
Negative0000 (0)