EXHIBIT 99.1

JOINT FILER INFORMATION

Other Reporting Person(s)

1. BECKER DRAPKIN MANAGEMENT, L.P.

Item	Information
Name:	BECKER DRAPKIN MANAGEMENT, L.P.
Address:	300 Crescent Court, Suite 1111, Dallas, Texas 75201
Designated Filer:	Steven R. Becker
Date of Event Requiring Statement (Month/Day/Year):	May 17, 2011
Issuer Name and Ticker or Trading Symbol:	Strategic Diagnostics Inc. [SDIX]
Relationship of Reporting Person(s) to Issuer:	10% Owner
If Amendment, Date Original Filed (Month/Day/Year):	Not Applicable
Individual or Joint/Group Filing:	Form filed by More than One Reporting Person
Signature:	By:	/s/ Ashley Sekimoto
	Name:	Ashley Sekimoto
	Title:	Attorney-in-Fact
	Date:	May 19, 2011

2. BECKER DRAPKIN PARTNERS (QP), L.P.

Item	Information
Name:	BECKER DRAPKIN PARTNERS (QP), L.P.
Address:	300 Crescent Court, Suite 1111, Dallas, Texas 75201
Designated Filer:	Steven R. Becker
Date of Event Requiring Statement (Month/Day/Year):	May 17, 2011
Issuer Name and Ticker or Trading Symbol:	Strategic Diagnostics Inc. [SDIX]
Relationship of Reporting Person(s) to Issuer:	10% Owner
If Amendment, Date Original Filed (Month/Day/Year):	Not Applicable
Individual or Joint/Group Filing:	Form filed by More than One Reporting Person
Signature:	By:	Becker Drapkin Management, L.P.
	Its:	General Partner
	By:	BC Advisors, LLC
	Its:	General Partner
	By:	/s/ Ashley Sekimoto
	Name:	Ashley Sekimoto
	Title:	Attorney-in-Fact
	Date:	May 19, 2011

3. BECKER DRAPKIN PARTNERS, L.P.

Item	Information
Name:	BECKER DRAPKIN PARTNERS, L.P.
Address:	300 Crescent Court, Suite 1111, Dallas, Texas 75201
Designated Filer:	Steven R. Becker
Date of Event Requiring Statement (Month/Day/Year):	May 17, 2011
Issuer Name and Ticker or Trading Symbol:	Strategic Diagnostics Inc. [SDIX]
Relationship of Reporting Person(s) to Issuer:	10% Owner
If Amendment, Date Original Filed (Month/Day/Year):	Not Applicable
Individual or Joint/Group Filing:	Form filed by More than One Reporting Person
Signature:	By:	Becker Drapkin Management, L.P.
	Its:	General Partner
	By:	BC Advisors, LLC
	Its:	General Partner
	By:	/s/ Ashley Sekimoto
	Name:	Ashley Sekimoto
	Title:	Attorney-in-Fact
	Date:	May 19, 2011

4. BC ADVISORS, LLC

Item	Information
Name:	BC ADVISORS, LLC
Address:	300 Crescent Court, Suite 1111, Dallas, Texas 75201
Designated Filer:	Steven R. Becker
Date of Event Requiring Statement (Month/Day/Year):	May 17, 2011
Issuer Name and Ticker or Trading Symbol:	Strategic Diagnostics Inc. [SDIX]
Relationship of Reporting Person(s) to Issuer:	10% Owner
If Amendment, Date Original Filed (Month/Day/Year):	Not Applicable
Individual or Joint/Group Filing:	Form filed by More than One Reporting Person
Signature:	By:	/s/ Ashley Sekimoto
	Name:	Ashley Sekimoto
	Title:	Attorney-in-Fact
	Date:	May 19, 2011

5. MATTHEW A. DRAPKIN

Item	Information
Name:	MATTHEW A. DRAPKIN
Address:	300 Crescent Court, Suite 1111, Dallas, Texas 75201
Designated Filer:	Steven R. Becker
Date of Event Requiring Statement (Month/Day/Year):	May 17, 2011
Issuer Name and Ticker or Trading Symbol:	Strategic Diagnostics Inc. [SDIX]
Relationship of Reporting Person(s) to Issuer:	10% Owner
If Amendment, Date Original Filed (Month/Day/Year):	Not Applicable
Individual or Joint/Group Filing:	Form filed by More than One Reporting Person
Signature:	By:	/s/ Ashley Sekimoto
	Name:	Ashley Sekimoto
	Title:	Attorney-in-Fact
	Date:	May 19, 2011