FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * TAMERIUS JOHN   2. Issuer Name and Ticker or Trading Symbol QUIDEL CORP /DE/ [QDEL] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP - Clinical/Reg Affairs (Last) (First) (Middle) 10165 MCKELLAR COURT 3. Date of Earliest Transaction (Month/Day/Year) 02/25/2013 (Street) SAN DIEGO, CA 92121 4. If Amendment, Date Original Filed(Month/Day/Year) 02/27/2013 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Non-Qualified Stock Option

$ 22.21

02/25/2013

A

19,736

(1)

02/25/2023

Common Stock

19,736

$ 0

19,736

D

Restricted Stock Units

(2)

02/25/2013

A

900

(3)

(3)

Common Stock

900

$ 0

900

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
TAMERIUS JOHN 10165 MCKELLAR COURT SAN DIEGO, CA 92121			SVP - Clinical/Reg Affairs

Signatures

Robert J. Bujarski, attorney-in-fact for John Tamerius		03/27/2013
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	9,868 shares will vest on the second anniversary date of the grant date, February 25, 2015. 4,934 shares will vest on the third anniversary date of the grant date, February 25, 2016. 4,934 shares will vest on the fourth anniversary date of the grant date, February 25, 2017.
(2)	Each restricted stock unit represents the right to receive one share of Quidel Corporation common stock.
(3)	450 shares will vest on the second anniversary date of the grant date, February 25, 2015. 225 shares will vest on the third anniversary date of the grant date, February 25, 2016. 225 shares will vest on the fourth anniversary date of the grant date, February 25, 2017.
Remarks: This amended Form 4 is being filed to correct the number of derivative securities acquired by the reporting person, the related amount of securities underlying the derivative securities, and the amounts that vest on the respective vesting dates.

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