Large gatherings in crowds may be contributing to a growing health challenge that threatens millions. Antimicrobial resistance (AMR) is an escalating global threat that makes deadly diseases harder to treat. Knowing how to mitigate this risk is crucial, as the danger posed by AMR is projected to increase in coming decades.
Recent research published in Nature Water demonstrated how large crowds help infect nearby wastewater systems with antibiotic resistance genes (ARGs). The findings contribute to a growing recognition of wastewater as a valuable disease surveillance tool. They also further highlight how large groups of people create pathogenic risk. Offsetting the increasing AMR of dangerous bacterial strains remains a top health priority.
What Were the Key Findings About Large Gatherings and AMR?
The study found ARGs in wastewater that boost resistance to two beta-lactam antibiotics. Both metallo-beta-lactamase (MBL) and extended-spectrum beta-lactamase (ESBL) appeared in collected samples. These findings explained antibiotic-resistant bacterial colonies researchers found in sewage after large gatherings.
No resistant colonies showed up in wastewater from a control plant that did not have mass gatherings nearby. The stark contrast provides clear evidence for how mass gatherings help AMR strains spread.
The study’s authors recommend that their discovery serves as a basis for future wastewater monitoring efforts. They also suggest that untreated sewage and poor quality wastewater infrastructure could increase the risk of AMR. Further research could use molecular analysis to more closely monitor the cultivation of bacteria with ARGs. Such investigations could lead to better prevention and awareness of AMR threats.
How Did the Study Show Large Gatherings Increase AMR?
Large gatherings after the COVID-19 pandemic provided a suitable opportunity see how they spread ARGs. The study documented sewage samples collected from plants that get untreated wastewater from large gatherings. Researchers also collected samples from locations in the nearby community. As a control, they also gathered samples from a plant that processed no wastewater from crowded events.
Metagenomic analysis allowed researchers to identity the prevalence of ARGs. The study also pinpointed a specific beta-lactamase gene that appeared during large gatherings. These findings strongly suggest that crowds spread ARGs through communities.
The study used gatherings observing Hajj and Umrah as part of Ramadan in Saudi Arabia. The Hajj pilgrimage gathers millions of religious observers to the cities of Mecca and Medina. The pilgrims all make their journeys over the same period of about a week. Researchers drew samples from Hajj pilgrimages during July 2020, 2021, and 2022. Umrah yielded samples collected during Ramadan in 2021 and 2022.
Researchers compared these samples to baseline data from 2017-2019 prior to the COVID-19 pandemic. By analyzing 649 metagenomes derived from 96 countries, they compared the abundance of ARGs in wastewater. As a result, the study could derive clear conclusions about the influence of mass gatherings on AMR resistance in communities.
Conclusion
A recent study shows how mass gatherings increase the potential for AMR to spread. Large crowds help introduce antimicrobial resistance genes (ARGs) to nearby wastewater systems. The findings could lead to better prevention and monitoring strategies for future outbreaks of AMR strains.
Have an upcoming trip? Passport Health offers a wide variety of options to help keep you safe from disease, including vaccines. Call or book online to schedule your appointment today.
Logan Hamilton is a health and wellness freelance writer for hire. He’s passionate about crafting crystal-clear, captivating, and credible content that elevates brands and establishes trust. When not writing, Logan can be found hiking, sticking his nose in bizarre books, or playing drums in a local rock band. Find him at loganjameshamilton.com.
US - English
CA - English
Rest of World - English
