AVITAR adds to Managerial and Sales Staff.

February 22, 2000

CANTON, MA, February 22, 2000 – Avitar, Inc. (NASDBB: AVIT.OB) has appointed Joseph Jones as Operations Manager to its U.S. Drug Testing Laboratories (USDTL) unit. Mr. Jones comes to Avitar with 13 years of experience with the Laboratory Corporation of America, of Raleigh, N.C.. Mr. Jones will be responsible for the day to day management of the laboratories which perform HAIRscreen™ tests for drugs of abuse, as well as the confirmation tests for Avitar’s point of care ORALscreen™ drugs of abuse tests.

"Joe brings to us a strong background in operations management, which will enable us to rapidly expand our volume in hair testing and oral fluid confirmations. Joe’s skills are very complementary to the strong scientific capabilities currently in place in our lab," said Doug Lewis, President of Avitar’s USDTL unit.

Avitar also announced the appointment of Kevin Miller as the Regional Sales Manager for its North Central region. Mr. Miller has extensive sales experience in the drugs of abuse area with both MedTox Laboratories and most recently, Lab One. Prior to his experience with MedTox, Kevin was with the U.S. Army Special Operations (Airborne) at Fort Bragg, N.C..

"Kevin brings to us a very successful sales background with two of the well-known laboratories in this country who provide drugs of abuse laboratory testing services. His knowledge of the market and the region in which he will be located will enable us to provide outstanding sales coverage to this area as we continue to execute our strategies of having direct sales resources to cover the entire country," said Peter Phildius, chairman and chief executive officer of Avitar.

Avitar, Inc. (NASDBB: AVIT.OB), headquartered in Canton, Massachusetts, develops, manufactures and markets innovative medical devices based on core technologies in oral fluid diagnostics and customized polyurethane applications. The company markets a unique portfolio of substance abuse testing products and services that includes the first point-of-contact rapid oral fluid screening device for drugs of abuse. Avitar also markets an oral fluid collection system for DNA testing, as well as a proprietary line of polyurethane-based high tech medical devices. For more information, see Avitar’s web site at avitarinc.com.

This release forward looking statements that are subject to risks and uncertainties, including the development of new applications, that are detailed from time to time in the Company’s filings with the Securities and Exchange Commission.