Arrayit Corporation and the USDA Join Forces to Protect America’s Crop Plants

SUNNYVALE, CA--(Marketwire - October 22, 2009) - Arrayit Corporation (OTCBB: ARYC), a proprietary life sciences technology leader, announced on October 21st, 2009 that the US Department of Agriculture in Baton Rouge, Louisiana, purchased Arrayit’s proprietary technology to assist the USDA in fighting off honeybee extinction and the catastrophic loss of America’s crop plants.

The USDA is deploying Arrayit’s proprietary SpotLight microarray scanning technology and high-speed BioBlue computers to identify biomarkers in the honeybee genome that confer resistance to varroa and tracheal mites, the parasites that threaten the worldwide honeybee population. Honeybee numbers have recently dwindled by 60-70% in some regions of the United States, and honeybees pollinate an estimated $14 billion worth of American crop plants including many essential fruits, seeds and vegetables.

“We are pleased that the USDA is using our scanning and computing technology for this important project,” states Rene Schena, CEO of Arrayit Corp. “Arrayit is dedicated to protecting American agriculture for the benefit of farmers and consumers.”

About Arrayit Corporation

Arrayit Corporation, headquartered in Sunnyvale, California, leads and empowers the genetic, research, pharmaceutical, and diagnostic communities through the discovery, development and manufacture of proprietary life science technologies and consumables for disease prevention, treatment and cure. It now offers over 650 products to a customer base, including most every major university, pharmaceutical and biotech company, major agricultural and chemical company, government agency, national research foundation and many private sector enterprises. Please visit www.arrayit.com for more information.

Safe Harbor Statement

Except for historical information contained herein, statements made in this release that constitute forward-looking statements are based on currently available information, involve certain risks and uncertainties and the Company assumes no responsibility to update any such forward-looking statement. The following factors, among others, may cause actual results to differ materially from the results suggested in the forward-looking statements. Risks that may result from changes in the Company’s business operations; our ability to keep pace with technological advances; significant competition in the biomedical business; our relationships with key suppliers and customers; quality and consumer acceptance of newly introduced products; market volatility; non-availability of product; excess inventory; price and product competition; new product introductions, the outcome of our legal disputes; the possibility that the review of our prior filings by the SEC may result in changes to our financial statements; and the possibility that stockholders or regulatory authorities may initiate proceedings against Arrayit and/or our officers and directors as a result of any restatements. Risk factors associated with our business, including some of the facts set forth herein, are detailed in the Company’s Form 10-K/A for the fiscal year ended December 31, 2008 and Form 10-Q/A for the fiscal first quarter ended March 31, 2009 and Form 10-Q/A for the fiscal third quarter ended September 30, 2008.