Instances of altered gut microbiomes among Irish cricketers over periods of travel in the lead up to the 2016 World Cup: A sequencing analysisOriginal paper
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Read MoreWhat was studied?
This study examined whether travel undertaken by elite athletes in the build-up to the 2016 Cricket World Cup altered the composition of the gut microbiome. Researchers collected faecal samples at baseline and after travel and analyzed them using 16S rRNA amplicon sequencing. A subset of samples was also examined with shotgun metagenomic sequencing to look at antibiotic resistance and virulence genes in more detail. The work was motivated by concern that travel-related stress and antibiotic resistance gene spread could affect gut microbiome stability and, potentially, athletic performance.
Who was studied?
The cohort consisted of Irish cricket players preparing for the 2016 Cricket World Cup, including 14 male and 7 female athletes. Faecal samples were collected from all 21 participants at baseline and after travel. A smaller subset of four participants had their samples additionally analyzed by shotgun metagenomic sequencing.
What were the most important findings?
One particular travel time point was identified as having the potential to disrupt the gut microbiome, unlike other travel periods examined. Following this travel, alpha diversity of the gut microbiome decreased, accompanied by shifts in the taxonomic profile of the microbial community. Shotgun metagenomic analysis also revealed changes in antibiotic resistance genes and virulence genes after travel. These changes appeared to be linked, in particular, to episodes of gastrointestinal distress during travel.
What are the greatest implications of this study?
The findings suggest that travel, especially when accompanied by gastrointestinal distress, can disrupt the gut microbiome of elite athletes, including reductions in diversity and changes in resistance and virulence gene content. Because this analysis was conducted in athletes, the authors note the findings may have broader relevance beyond sport. The results raise concern that travel-associated microbiome disruption could carry implications for health and, potentially, performance in populations that travel frequently. This underscores the value of monitoring gut microbiome stability during periods of travel.