Abstract: Bioengineered collagen constructs with antimicrobial properties are provided. The bioengineered collagen constructs comprise a sheet-like layer of purified collagenous tissue matrix derived from a tissue source, such as the tunica submucosa of small intestine or a processed intestinal collagen layer derived from the tunica submucosa of small intestine, treated with an antimicrobial agent. The constructs are biocompatible. The present invention has a variety of applications, including wound dressing and surgical repair devices. Methods for treating a damaged or diseased soft tissue are provided. Methods for treating a wound in need of care and treatment are also disclosed.