NEWS RELEASE
FOR IMMEDIATE RELEASE

INVESTOR RELATIONS CONTACT:                             COMPANY CONTACT:
Hayden Communications                                   Anthony J. Simonetta
Brett Maas  (brett@haydenir.com)                        Chief Financial Officer
Matt Hayden (matt@haydenir.com)                         (302) 456-6789
(843) 272-4653                                          www.sdix.com


      STRATEGIC DIAGNOSTICS REPORTS INCREASE IN FOOD SAFETY PRODUCT ORDERS

 FOOD PATHOGEN TEST SALES TO NEW CUSTOMERS BOTH DOMESTICALLY AND INTERNATIONALLY
                             CONTRIBUTE TO INCREASE

NEWARK, DEL., JUNE 20, 2005 - STRATEGIC DIAGNOSTICS INC. (NASDAQ: SDIX), a
leading provider of biotechnology-based detection solutions for a broad range of
food, water, agricultural, industrial and environmental applications, today
announced that new customers for the Company's food pathogen test products have
continued to drive demand while the number of product evaluations, a leading
indicator of method adoption, continue to grow. In addition, the Company's new
international distributor for food pathogen testing has begun to place orders
for new customers and those orders have been shipped. In aggregate, domestic and
international revenue related to recent orders from new customers is estimated
to be in excess of $500,000 annually.

"These results reflect growing customer acceptance of our products and sales
strategy related to the Company's food safety product line," commented Matthew
Knight, President and CEO of SDI. "We are pleased with our continuing progress
and our ability to further accelerate the growth of our food pathogen product
line."

Incremental revenue growth is provided in part by a top-40 U.S. producer of
finished consumer meat products. Upon completion of a comprehensive evaluation
of the Company's Listeria test, this customer has adopted it as their standard
method and initiated routine orders with SDI.

SDI customers and prospects have now run thousands of validation tests on
hundreds of different foods and environmental samples. These studies continue to
demonstrate the combined efficacy of the Company's proprietary enrichment media
and unique lateral flow test devices in producing required sensitivity and
specificity to the target. These same evaluations also continue to demonstrate
how SDI methods can dramatically improve customer testing efficiency and lower
cost. The Company continues to work closely with customers to tailor application
of the technology to their matrix requirements. Worldwide demand for rapid food
pathogen diagnostics and the associated enrichment media is estimated to be $250
million annually.

About Strategic Diagnostics Inc.
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SDI develops and markets biotechnology based detection solutions for a broad
range of agricultural, industrial, environmental and water management
applications. By leveraging its expertise in immunology, proteomics,
bio-luminescence, and other bio-reactive technologies with innovative
application and production capabilities, the Company is able to provide
sophisticated diagnostic testing and immunoreagent systems to a diverse customer
base serving multiple vertical markets. Through its Strategic BioSolutions(TM)
brand, SDI serves the research, human diagnostic and pharmaceutical sectors with
a wide range of services including complete outsourcing for the production of
monoclonal and polyclonal antibodies used in commercialized products offered by
leading diagnostic and pharmaceutical companies. FeedChek(TM), Trait Chek(TM),
GMO QuickChek(TM), and GMO Chek(TM) are pending trademarks for SDI.

This news release contains forward-looking statements reflecting SDI's current
expectations. When used in this press release, the words "anticipate", "could",
"enable", "estimate", "intend", "expect", "believe", "potential", "will",
"should", "project" "plan" and similar expressions as they relate to SDI are
intended to identify said forward-looking statements. Investors are cautioned
that all forward-looking statements involve risks and uncertainties, which may
cause actual results to differ from those anticipated by SDI at this time. Such
risks and uncertainties include, without limitation, changes in demand for
products, delays in product development, delays in market acceptance of new
products, retention of customers and employees, adequate supply of raw
materials, inability to obtain or delays in obtaining fourth party, including
AOAC, or required government approvals, the ability to meet increased market
demand, competition, protection of intellectual property, non-infringement of
intellectual property, seasonality, and other factors more fully described in
SDI's public filings with the U.S. Securities and Exchange Commission.