Gull Laboratories, the Salt Lake-based manufacturer of medical diagnostics, has entered into a distribution agreement with Stuart Scientific, Greensburg, Pa., allowing Stuart to distribute Gull test kits and reagents in six northeastern states.

Ernie Sumsion, vice president of marketing for Gull, said the agreement will nearly double Gull product sales in that area. Stuart Scientific is a subsidiary of Stuart Drug and Surgical Inc., a producer and marketer of medical equipment, diagnostics and supplies for more than 30 years.