| OUTCOMES |
|
Type of outcome
|
Outcome
|
Timepoint(s) at which outcome measured
|
| Primary Outcome |
The primary outcome is the change in the mean count of 11 targeted fecal bacterial pathogen group present between baseline and 35th day after randomization. The list of 11 selected pathogens to be detected by TAC (qPCR) includes Aeromonas, Campylobacter coli, Campylobacter jejuni, Campylobacter Pan, Enteroaggregative E. Coli, Enteropathogenic E. Coli, Enterotoxigenic E. Coli, Plesiomonas, Shigella_EIEC, Salmonella and Vibrio cholera |
2 weeks afer the last dose of the intervention |
| Secondary Outcome |
Change in the average count and relative abundance of specific enteric pathogens (Salmonella, Shigella, Campylobacter, ETEC, EPEC, EAEC, rotavirus, norovirus, Giardia, and Cryptosporidium) detected in stool by TAC-qPCR in pregnant women at Day 21, Day 35, Day 63, and 7 days postpartum, compared to the placebo arm and the observation arm. |
7 days postpartum |
| Secondary Outcome |
Persistence of VE818 strains in pregnant women, measured by shotgun metagenomic sequencing of fecal samples and CapScan collected at Day 21, Day 35, Day 63, and 7 days postpartum. |
7 days postpartum |
| Secondary Outcome |
Change in the concentration of intestinal inflammation biomarkers (myeloperoxidase, neopterin, calprotectin, and lipocalin) in pregnant women measured by ELISA between the start of the study (before and after oral vancomycin treatment) and Day 21, Day 35, Day 63, and 7 days postpartum, compared to the placebo arm and the observation arm. |
7 days postpartum |
| Secondary Outcome |
Change in intestinal permeability measured by the Lactulose/Rhamnose (LR) ratio in pregnant women between the start of the study (before oral vancomycin treatment) and Day 35, compared to the placebo arm and the observation arm. |
35 days after intervention start |
| Secondary Outcome |
Change in alpha and beta diversity of the fecal microbiota in pregnant women measured by shotgun metagenomic sequencing between the start of the study (before and after oral vancomycin treatment) and Day 21, Day 35, Day 63, and 7 days postpartum, compared to the placebo arm and the observation arm. |
7 days postpartum |
| Secondary Outcome |
Change in alpha and beta diversity of the vaginal microbiome in pregnant women measured by shotgun metagenomic sequencing between the start of the study (before and after oral vancomycin treatment) and Day 21, Day 35, and Day 63, compared to the placebo arm and the observation arm. |
21 days, 35 days and 63 days after the start of intervention |
| Secondary Outcome |
Change in alpha and beta diversity of the oral microbiome in pregnant women measured by shotgun metagenomic sequencing between the start of the study (before oral vancomycin treatment), and Day 21 and Day 35, compared to the placebo arm and the observation arm. |
21 days and 35 days after the start of the intervention |
| Secondary Outcome |
Change in the blood, fecal, and urinary metabolome in pregnant women between the start of the study (before and after oral vancomycin treatment), and Day 21, Day 35, and Day 63, compared to the placebo arm and the observation arm. |
21 days, 35 days and 63 days after the start of the intervention |
| Secondary Outcome |
Change in the concentration of a panel of blood biomarkers (CRP, AGP, sCD14, LBP, CD163 and iFABP) in pregnant women as measured by ELISA between the start of the study (before and after oral vancomycin pretreatment) and Day 35 and Day 63 in the treatment arm compared to the placebo arm and the observation-only arm. |
35 days and 63 days after the start of the study |