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 * Calzavara Marco G.   2. Issuer Name and Ticker or Trading Symbol MERIDIAN BIOSCIENCE INC [VIVO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Pres & Managing Director, MBE (Last) (First) (Middle) 3471 RIVER HILLS DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 04/21/2011 (Street) CINCINNATI, OH 4524 4. If Amendment, Date Original Filed(Month/Day/Year) 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 Common Stock 04/21/2011   A   3,200 (1) A $ 0 3,200 D   Common Stock 04/21/2011   A   1,500 (2) A $ 0 4,700 D   Common Stock 04/21/2011   A   1,500 (3) A $ 0 6,200 D   Common Stock 04/21/2011   A   3,200 (4) A $ 0 9,400 D

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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Calzavara Marco G. 3471 RIVER HILLS DRIVE CINCINNATI, OH 4524			Pres & Managing Director, MBE

Signatures

/s/ Melissa A. Lueke as Attorney-in-Fact for Marco Calzavara		04/22/2011
**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)	These restricted shares are awarded under the 2004 Equity Compensation Plan and vest in four tranches of 25% each. The first tranche vests on July 20, 2011, with each of the remaining tranches vesting on July 20, 2012; July 20, 2013; and July 20, 2014.
(2)	These restricted shares are awarded under the 2004 Equity Compensation Plan and vest in four tranches of 25% each. Subject to the attainment of a specified earnings target for fiscal 2011, the first tranche vests on November 11, 2011, with the remaining tranches vesting on November 11, 2012; November 11, 2013; and November 11, 2014.
(3)	These restricted shares are awarded under the 2004 Equity Compensation Plan and vest in full (or 100%) on November 11, 2014.
(4)	These restricted shares are awarded under the 2004 Equity Compensation Plan and vest in four tranches of 25% each. The first tranche vests on January 31, 2012, with each of the remaining tranches vesting on January 31, 2013; January 31, 2014; and January 31, 2015.

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