CANTON, Mass.--(BUSINESS WIRE)--Avitar Inc. (OTCBB:AVTI), manufacturers of nationally branded oral fluid testing diagnostic devices and customized polyurethane applications used in wound dressings, announced today that the company is poised to take advantage of the conversion by several major international companies from traditional urine-based drug testing to AVITAR’S ORALscreen rapid on-site test for drugs-of-abuse.