Celebration of Scholars
Assessing the ability of a microgravity environment to promote the transfer of antibiotic resistance genes between bacteria
Name:
Tristan Grams
Major: Biology
Hometown: Cudahy, WI
Faculty Sponsor:
Andrea Henle
Other Sponsors: Kasthuri Venkateswaran, Camilla Urbaniak
Type of research: Independent research
Funding: NASA under Award No. NIP17_1.0
Abstract
Anti-microbial resistance (AMR) is a major concern worldwide, which prompted the World Health Organization (WHO) this year to publish the first ever list of antibiotic resistant “priority pathogens” that pose the greatest threat to human health. While AMR is a serious problem on Earth, it is an even bigger issue in space, as astronauts become immune-compromised and therefore more prone to infection. This, coupled with the fact that bacteria become more virulent and antibiotic resistant when grown in space, make the study of AMR under microgravity a high priority. It is not yet known what causes bacteria grown in space to become resistant or more susceptible to antibiotics, but we believe it could be due to increased horizontal gene transfer (HGT) of AMR genes and/or increased mutations in AMR genes, leading to a gain of function when these bacteria are exposed to microgravity.
A microbial monitoring study of the International Space Station (ISS), isolated various strains of Acinetobacter pittii, which were resistant to 6 antibiotics, one of which was oxacillin. To carry out our hypothesis, S. aureus, isolated from the ISS, and negative for blaOXA, will be incubated with A. pittii, which carries OXA75 and OXA421, under simulated microgravity using the High Aspect Ratio Vessel (HARV). Determining the cause of increased AMR will help protect astronauts on future long-term space missions.