Rare clay used by B.C. aboriginals found to kill bacteria resistant to antibiotics, say UBC researchers
UBC researchers say the clay exhibits potent antibacterial activity against multidrug-resistant pathogens.
Researchers at the University of B.C. have discovered that a rare clay used as medicine by aboriginals in northern B.C. contains antibacterial properties that could be used to treat antibiotic-resistant bacteria.
Some 400 kilometres north of Vancouver, on the Heiltsuk First Nation’s traditional territory, sits a 400-million kilogram deposit of glacial clay in Kisameet Bay that scientists believe was formed near the end of the last Ice Age, approximately 10,000 years ago.
The grey-green clay, known as Kisolite, has been used for centuries by the Heiltsuk First Nations to treat a range of ailments, including ulcerative colitis, arthritis, neuritis, phlebitis, skin irritation, and burns. Locals have also historically used the clay for eczema, acne and psoriasis.
Now, UBC researchers say the clay exhibits potent antibacterial activity against multidrug-resistant pathogens.
Testing conducted by UBC microbiologist Julian Davies and researcher Shekooh Behroozian found that the clay, suspended in water, killed 16 strains of ESKAPE bacteria samples from sources including Vancouver General Hospital, St. Paul’s Hospital, and the University of B.C.’s waste water treatment plant.