Imbed Biosciences says its wound-healing product is being used at five hospitals and more than 20 veterinary clinics, and a new investment will let the young Fitchburg company expand sales nationwide.

Imbed’s MicroLyte Ag Matrix is a patented, ultra-thin film coated with silver nanoparticles that stick to the surface of a wound.

More than 1,000 patients with chronic wounds — including those from surgery, burns, trauma wounds and diabetic ulcers — have been treated with the film in the past year, CEO and co-founder Ankit Agarwal said.

“It kills the bacteria that was hidden in deep wound tissue … and allows the body to regain its normal healing powers,” Agarwal said. Read the full story here.