{Reference Type}: Journal Article
{Title}: Gut microbiota dynamics in travelers returning from India colonized with extended-spectrum cephalosporin-resistant Enterobacteriaceae: A longitudinal study.
{Author}: Pires J;Kraemer JG;Kuenzli E;Kasraian S;Tinguely R;Hatz C;Endimiani A;Hilty M;
{Journal}: Travel Med Infect Dis
{Volume}: 27
{Issue}: 0
{Year}: Jan 2019 0
{Factor}: 20.441
{DOI}: 10.1016/j.tmaid.2018.10.012
{Abstract}: Intestinal colonization by extended-spectrum cephalosporin-resistant Enterobacteriaceae (ESC-R-Ent) has been attributed to travel to high prevalence countries. However, the dynamics of the microbiota changes during ESC-R-Ent colonization and whether there is a particular bacterial composition which is associated with subsequent colonization is unknown.<BR>Forty healthy volunteers living in Switzerland underwent screening before and after a trip to India, and also 3, 6 and 12 months after traveling. Culture-based ESC-R-Ent screening and microbiota analysis based on 16S rRNA amplicon sequencing were performed at all time points.<BR>Prevalence of ESC-R-Ent colonization before traveling was 10% (n = 4), whereas it increased to 76% (n = 31) after the trip. Based on bacterial diversity analyses of the gut microbiota, there were few but significant differences for colonized versus non-colonized individuals. However, an alternative, cluster based analysis revealed that individuals remained in the same cluster over time indicating that neither traveling nor ESC-R-Ent colonization significantly influences bacterial composition. Moreover, none of the found microbiota clusters were significantly associated with subsequent risk of ESC-R-Ent colonization.<BR>Based on their microbiota patterns, every volunteer was at the same risk of ESC-R-Ent colonization while traveling to India. Therefore, other risk factors for ESC-R-Ent colonization are responsible for this phenomenon.