Methodology Reveals How Golden Staph Survives Inside Human Cells

University of Melbourne researchers uncovered new findings about Staphylococcus aureus, commonly known as Golden staph, in their recent paper published in the journal eLife. Dr. Abdou Hachani led the team to develop a state-of-the-art methodology called 'InToxSa,' which allows for a comprehensive investigation of Golden staph's behavior within human cells. The findings shed light on the bacterium's ability to survive and thrive inside the human body, providing valuable insights for developing precision medicine and new strategies to combat severe infections.

Golden staph is present in the noses or on the skin of approximately one in three people globally, posing a potential threat if it enters the bloodstream through wounds or medical procedures. While most carriers remain unaffected, the bacterium can cause severe infections and even be fatal.

Dr. Hachani and his team utilized the InToxSa methodology to analyze hundreds of S. aureus strains taken from patients with bloodstream infections. This approach enabled them to observe specific changes that make the bacteria less harmful and more adept at surviving within the human body.

By identifying the genes responsible for Golden staph's ability to persist inside host cells without killing them, the researchers made a vital advancement in understanding the mechanisms behind lethal S. aureus infections.

Additionally, the InToxSa platform, combining genetic analysis, microbiological data, and statistical comparisons, revealed mutations in the bacterium that are clinically relevant and enhance its capacity to survive intracellularly. This groundbreaking knowledge will guide future research endeavors aimed at discovering innovative methods to combat these infections.

InToxSa represents a step forward in the study of S. aureus intracellular behavior. Its versatile, high-throughput cell-based phenomics platform enables researchers to investigate and quantify intracellular cytotoxic phenotypes of S. aureus on a large scale.

By focusing on the context of the host cell-bacterium interaction during infection, InToxSa overcomes the limitations of traditional toxicity assays that primarily assess extracellular factors produced during bacterial growth. Moreover, the platform's ability to handle a large volume of data in a standardized and systematic manner accelerates the scientific discovery process, making it an valuable tool for future research endeavors.