Neogen chosen for new Russell index

LANSING, Mich., July 11, 2005 – Neogen Corporation (NASDAQ: NEOG) today announced it has been chosen by the Russell Investment Group to be included in its new Russell Microcap™ Index.

Launched on July 1, the Russell Microcap Index offers portfolio managers and other investors a comprehensive, unbiased barometer to compare their performance against the genuine microcap marketplace of stocks.

“We’re very pleased with our increasing opportunities to discuss Neogen’s attractive fundamentals with a wider investment audience,” said James Herbert, Neogen’s president. “This notice by the prestigious Russell Group should increase interest in our stock at the institutional level.”

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. For the complete list of companies in the new Russell Microcap Index, visit www.russell.com/US/Indexes.

Neogen plans to report its fourth quarter and FY 2005 financial results on Tuesday, July 26. Neogen President Herbert will host a conference call for investors and analysts at 11 a.m. ET on July 26 to discuss the results, and look behind the numbers. To participate in the conference call, contact Investor Relations Manager Terry Maynard at 517-372-9200 or via e-mail at tmaynard@neogen.com.

Neogen Corporation develops and markets products and services dedicated to food and animal safety. The company’s Food Safety Division markets dehydrated culture media, and diagnostic test kits to detect foodborne bacteria, natural toxins, genetic modifications, food allergens, unique proteins, drug residues, plant diseases and sanitation concerns. Neogen’s Animal Safety Division markets a complete line of diagnostics, veterinary instruments, veterinary pharmaceuticals, nutritional supplements, disinfectants, and rodenticides.

Certain portions of this news release that do not relate to historical financial information constitute forward-looking statements. These forward-looking statements are subject to certain risks and uncertainties. Actual future results and trends may differ materially from historical results or those expected depending on a variety of factors listed in Management’s Discussion and Analysis of Financial Condition and Results of Operations in the Company’s most recently filed Form 10-K.