Neogen acquires assets of Rivard Instruments

EXHIBIT 99.1

FOR IMMEDIATE RELEASE

CONTACT:               Richard Current

Neogen VP & CFO

517/372-9200

Neogen acquires assets of Rivard Instruments

LANSING, Mich., Dec. 4, 2007 — Neogen Corporation (Nasdaq: NEOG) announced today that it has acquired the assets of Rivard Instruments, Inc., of Winnipeg, Canada. Rivard Instruments and Neogen’s subsidiary, Ideal Instruments, Inc., are both manufacturers of detectable veterinary hypodermic needles.

The acquisition settles lengthy litigation between the two companies regarding numerous patents owned by each. The patent battles were centered on lawsuits filed by Ideal Instruments in federal courts in Iowa charging Rivard Instruments with patent infringement. A similar lawsuit in Canada was also settled as a part of this acquisition agreement.

Ideal Instruments and Rivard Instruments collectively own patents protecting the manufacturing and marketing of detectable veterinary hypodermic needles specially designed to reduce breakage during animal injections. The major advantage