Description
With antibiotic resistance causing over 1.2 million annual deaths, there is a critical need for new therapeutic compounds. This study investigated the antimicrobial potential of soil microorganisms isolated from Hampton University’s waterfront at Marine Point, a bridge between terrestrial and marine conditions. Today, soil remains a primary source for antibiotic discovery due to the competitive chemical defenses, or metabolites, produced by the diverse microbes. Environmental samples were cultured on marine agar to support possible halotolerant species. Six distinct isolates were selected based on unique characteristics and were exposed to antimicrobial testing via the cross-streak method. Test organisms included Escherichia coli, Enterococcus faecalis, Pseudomonas aeruginosa, Staphylococcus epidermidis, Staphylococcus aureus, and Bacillus subtilis. Of the six isolates screened, three demonstrated inhibitory activity against the test organisms. A red-pigmented isolate referred to as “Strawberry Guy” (SG) demonstrated broad-spectrum activity against both Gram-negative (P. aeruginosa, E. coli) and Gram-positive bacteria. Isolate “Warrior 1” (W1) showed high inhibitory activity against S. aureus and B. subtilis. Finally, the isolate “Turtle Shell Loner” (TSL) reduced the colony density of S. aureus. To date, DNA was isolated from W1 and successfully prepared for sequencing to facilitate molecular identification and further characterization of the organism. Future experiments will focus on the isolation and purification of these antimicrobial chemicals using solvent extraction to recover bioactive compounds from the microbial cultures. These results confirm that the Marine Point ecosystem on Hampton’s campus harbors diverse microbial communities capable of producing various metabolic properties, offering new leads in the global battle against antibiotic resistance.