Differences in the gut microbiota between Gurkhas and soldiers of British origin.

Previous work indicated that the incidence of travellers' diarrhoea (TD) is higher in soldiers of British origin, when compared to soldiers of Nepalese descent (Gurkhas). We hypothesise that the composition of the gut microbiota may be a contributing factor in the risk of developing TD in soldiers of British origin. This study aimed to characterise the gut microbial composition of Gurkha and non-Gurkha soldiers of the British Army. Recruitment of 38 soldiers (n = 22 Gurkhas, n = 16 non-Gurkhas) and subsequent stool collection, enabled shotgun metagenomic sequencing-based analysis of the gut microbiota. The microbiota of Gurkhas had significantly (P < 0.05) lower diversity, for both Shannon and Simpson diversity indices, using species level markers than the gut microbiota of non-Gurkha soldiers. Non-metric Multidimensional Scaling (NMDS) of the Bray-Curtis distance matrix revealed a significant difference in the composition of the gut microbiota between Gurkhas and non-Gurkha soldiers, at both the species level (P = 0.0178) and the genus level (P = 0.0483). We found three genera and eight species that were significantly enriched in the non-Gurkha group and one genus (Haemophilus) and one species (Haemophilus parainfluenzae) which were enriched in the Gurkha group. The difference in the microbiota composition between Gurkha soldiers and soldiers of British origin may contribute to higher colonization resistance against diarrhoeal pathogens in the former group. Our findings may enable further studies into interventions that modulate the gut microbiota of soldiers to prevent TD during deployment.

COVID-19-related health anxieties and impact of specific interventions in patients with inflammatory bowel disease in the UK.

OBJECTIVE: Health-related concerns brought on by the COVID-19 pandemic and the impact of specific local and national interventions have not been explored in patients with inflammatory bowel disease (IBD) in the UK. We evaluated perspectives of patients with IBD on the pandemic and effectiveness of information dissemination in addressing concerns. METHODS: We prospectively conducted a survey among patients with IBD during the COVID-19 pandemic to assess concerns, information-seeking behaviours, risk perception, compliance and effect of specific interventions. RESULTS: A total of 228 patients were interviewed of whom 89% reported being concerned about the impact of COVID-19 on their health. Access to at least one IBD-specific clinical interaction during the pandemic (COVID-19 information letter from IBD team, interaction with IBD team or general practitioner, Crohn and Colitis UK website visit) was significantly associated with alleviating concerns (OR 2.66; 95% CI 1.35 to 5.24; p=0.005). Seeking health information solely through unofficial channels (search engines or social media) was less likely to ease concerns (OR 0.15; 95% CI 0.03 to 0.61; p=0.008). A quarter of patients disagreed with their assigned risk groups, with majority perceiving higher-risk profiles. This discordance was greatest in patients within the moderate-risk group and constituted immunosuppression use. Nearly 40% of patients had ongoing concerns with regard to their medications of whom a third felt their concerns were not addressed. CONCLUSION: IBD-specific clinical interactions are associated with alleviation of COVID-19 health concerns. These findings have wider implications and emphasise importance of innovative solutions that facilitate effective communication with patients without overburdening current services.