Characterization of a Soil-Derived Bacterium in the Search for Novel Antibiotics to Combat Antibiotic Resistance
Location
CoLab, COM 390
Start Date
30-4-2026 5:30 PM
Document Type
Poster
Description
Antibiotic resistance is a growing global concern, highlighting the need to discover new antimicrobial compounds from natural sources such as soil bacteria. Soil is a rich source of diverse bacteria, many of which play important roles in medicine and the environment. In this study, a soil sample was collected and bacteria were isolated using serial dilution and plating techniques to obtain individual colonies. A selected isolate (Candidate #3) was further analyzed using differential staining methods to determine its morphology and cellular characteristics. Gram staining showed that the microbe is Gram-positive and rod-shaped (bacillus). Results from the endospore stain indicated that the isolate does not form endospores, and the acid-fast stain showed that it is acid-fast negative, suggesting the absence of mycolic acids in the cell wall. Together, these findings characterize Candidate #3 as a Gram-positive, non-endospore-forming, non-acid-fast bacterium. These findings demonstrate how basic microbiological techniques can be used to identify and classify unknown bacteria while supporting efforts in antibiotic discovery.
Characterization of a Soil-Derived Bacterium in the Search for Novel Antibiotics to Combat Antibiotic Resistance
CoLab, COM 390
Antibiotic resistance is a growing global concern, highlighting the need to discover new antimicrobial compounds from natural sources such as soil bacteria. Soil is a rich source of diverse bacteria, many of which play important roles in medicine and the environment. In this study, a soil sample was collected and bacteria were isolated using serial dilution and plating techniques to obtain individual colonies. A selected isolate (Candidate #3) was further analyzed using differential staining methods to determine its morphology and cellular characteristics. Gram staining showed that the microbe is Gram-positive and rod-shaped (bacillus). Results from the endospore stain indicated that the isolate does not form endospores, and the acid-fast stain showed that it is acid-fast negative, suggesting the absence of mycolic acids in the cell wall. Together, these findings characterize Candidate #3 as a Gram-positive, non-endospore-forming, non-acid-fast bacterium. These findings demonstrate how basic microbiological techniques can be used to identify and classify unknown bacteria while supporting efforts in antibiotic discovery.
Comments
The faculty mentor for this project was Eulandria Biddle.