SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    Form 10-Q


              (X) QUARTERLY REPORT PURSUANT TO SECTION 13 or 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                For the Quarterly Period Ended December 31, 1996

                                       OR

              ( )TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                For the transition period from        to        

Commission file number   0-14902


                           Meridian Diagnostics, Inc.
- --------------------------------------------------------------------------------

Incorporated under
the laws of Ohio                                   31-0888197
- --------------------                       -------------------------------------
                                           (I.R.S. Employer Identification No.)

                             3471 River Hills Drive
                             Cincinnati, Ohio 45244
                                 (513) 271-3700

Indicate  by a check  mark  whether  the  Registrant  (1) has filed all  reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
Registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.

                                   Yes   X    No


Indicate the number of shares  outstanding  of each of the  issuer's  classes of
common stock, as of the latest practicable date.

           Class                                 Outstanding at January 24, 1997
- --------------------------                       -------------------------------
Common stock, no par value                                 14,356,744

                                        Page 1 of 14





                   MERIDIAN DIAGNOSTICS, INC. AND SUBSIDIARIES

                     INDEX TO QUARTERLY REPORT ON FORM 10-Q

                                                                         Page(s)
                                                                         -------

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements-

        Consolidated Balance Sheets -                             
        December 31, 1996 and September 30, 1996                         3-4


        Consolidated Statements of Earnings -
        Three Months Ended December 31, 1996 and 1995                     5


        Consolidated Statements of Cash Flows - Three Months
        Ended December 31, 1996 and 1995                                  6


        Notes to Consolidated Financial Statements                       7-8


Item 2. Management's Discussion and Analysis of
        Financial Condition and Results of Operations                   9-11



PART II.OTHER INFORMATION

        Item 5. Other Information                                         12
        Item 6. Exhibits and Reports on Form 8-K                          13

        Signature

        Exhibit 11 Computation of Earnings per Common Share               14
        Exhibit 27 Financial Data Schedule                              15-17




                                        Page 2 of 14







                   MERIDIAN DIAGNOSTICS, INC. AND SUBSIDIARIES
                           Consolidated Balance Sheets
                                   (Unaudited)

                                     ASSETS

                                                   December 31,    September 30,
                                                        1996             1996
                                                   ------------    -------------
CURRENT ASSETS:
    Cash and cash equivalents                       $15,883,872      $ 5,648,225
    Short-term investments                            6,068,409       14,094,299
    Accounts receivable, less allowance of
       $124,504 and $128,013 for doubtful 
       accounts                                       8,009,535        9,206,498
    Inventories                                       5,164,869        4,251,531
    Prepaid expenses and other                          730,011          189,433
    Deferred tax assets                                 364,331          402,125
                                                     ----------       ----------

       Total current assets                          36,221,027       33,792,111
                                                     ----------       ----------

PROPERTY, PLANT AND EQUIPMENT:
    Land                                                278,529          277,691
    Building improvements                             5,909,647        5,864,008
    Machinery, equipment and furniture                6,400,483        6,322,071
    Construction in progress                          1,086,886        1,061,002
                                                     ----------       ----------

                                                     13,675,545       13,524,772
    Less- Accumulated depreciation and 
       amortization                                   5,442,005        5,171,388
                                                     ----------       ----------

       Net property, plant and equipment              8,233,540        8,353,384
                                                     ----------       ----------


  OTHER ASSETS:
    Long-term receivable and other                      547,999          573,710
    Deferred royalties                                  235,718          278,027
    Deferred tax assets                                 136,803          109,503
    Deferred debenture offering costs, net of
       accumulated amortization of $35,250 
       and $1,500                                     1,293,086        1,260,543
    Covenants not to compete, net of 
       accumulated amortization
       of $2,566,510 and $2,381,064                   2,954,085        3,139,530
    License agreements, net accumulated 
       amortization of $844,376 and $829,987            290,737          305,125
    Patents, tradenames, customer lists and 
       distributorships, net of accumulated 
       amortization of $829,876 and $707,474          3,289,124        3,417,517
    Other intangible assets, net of accumulated
       amortization of $191,819 and $154,469          2,049,181        2,086,531
    Costs in excess of net assets acquired, net
       of accumulated amortization of $738,002 
       and $675,553                                   3,090,991        3,153,441


       Total other assets                            13,887,724       14,323,927
                                                     ----------       ----------

       Total assets                                 $58,342,291      $56,469,422
                                                    ===========      ===========


                                        Page 3 of 14







                   MERIDIAN DIAGNOSTICS, INC. AND SUBSIDIARIES

                           Consolidated Balance Sheets
                                   (Unaudited)


                      LIABILITIES AND SHAREHOLDERS' EQUITY


                                                   December 31,    September 30,
                                                        1996             1996
                                                   -----------     -------------


CURRENT LIABILITIES:

    Current portion of long-term obligations      $    346,000    $    258,663
    Current portion of capital lease
       obligation                                      128,424         139,019
    Accounts payable                                 2,367,834         990,249
    Accrued payroll and payroll taxes                  467,628         850,722
    Other accrued expenses                           1,138,159       1,065,417
    Income taxes payable                             1,630,544         831,723
                                                    ----------      ----------

       Total current liabilities                     6,078,589       4,135,793
                                                    ----------      ----------


LONG-TERM OBLIGATIONS                               22,077,774      22,148,012
                                                    ----------      ----------

CAPITAL LEASE OBLIGATIONS                              594,247         617,619
                                                    ----------      ----------


SHAREHOLDERS' EQUITY:

    Preferred stock, no par value, 1,000,000
     shares authorized; none issued                       --              --

    Common stock, no par value, 50,000,000
     shares authorized; 14,284,468 and
     14,278,578 shares issued and outstanding,
     respectively stated at                          2,389,123       2,386,153
    Additional paid-in capital                      20,548,727      20,526,337
    Retained earnings                                6,795,772       6,809,830
    Cumulative foreign currency translation
     adjustment                                       (141,941)       (154,322)
                                                    ----------      ----------

       Total shareholders' equity                   29,591,681      29,567,998
                                                    ----------      ----------

       Total liabilities and shareholders'
         equity                                   $ 58,342,291    $ 56,469,422
                                                  ============    ============


                                        Page 4 of 14







                   MERIDIAN DIAGNOSTICS, INC. AND SUBSIDIARIES
                       Consolidated Statements of Earnings
                                   (Unaudited)

                                                         Three Months Ended
                                                             December 31,
                                                      --------------------------
                                                         1996            1995
                                                      -----------     ----------


NET SALES                                             $ 7,561,793   $ 5,521,529

COST OF SALES                                           2,710,869     1,747,499
                                                      -----------   -----------

        Gross profit                                    4,850,924     3,774,030
                                                      -----------   -----------

OPERATING EXPENSES:
    Research and development                              398,510       340,387
    Selling and marketing                               1,794,576     1,363,321
    General and administrative                          1,050,831     1,018,740
                                                      ------------   ----------

        Total operating expenses                        3,243,917     2,722,448
                                                      -----------   -----------

        Operating income                                1,607,007     1,051,582

OTHER INCOME (EXPENSE):
    Licensing and related fees                               -           15,900
    Interest income                                       304,438       127,083
    Interest expense                                     (490,300)     (146,667)
    Currency gains (losses)                                (3,794)       22,288
    Other, net                                             (1,526)       (7,440)
                                                      ------------   ----------
        Total other income (expense)                     (191,182)       11,164
                                                      ------------   ----------
        Earnings before income taxes                    1,415,825     1,062,746


INCOME TAXES                                              573,079       433,585
                                                      ------------   ----------
        Net earnings                                  $   842,746   $   629,161
                                                      ============= ============
PRIMARY WEIGHTED AVERAGE NUMBER
    OF COMMON SHARES OUTSTANDING                       14,735,225    13,897,766
                                                      ============= ============
PRIMARY EARNINGS PER COMMON SHARE                   $         .06 $         .05
                                                      ============= ============

FULLY DILUTED WEIGHTED AVERAGE NUMBER
    OF COMMON SHARES OUTSTANDING                           N/A       14,375,048
                                                      ------------   ----------
FULLY DILUTED EARNINGS PER COMMON SHARE                    N/A    $         .04
                                                      ------------   ----------

                                  Page 5 of 14







                   MERIDIAN DIAGNOSTICS, INC. AND SUBSIDIARIES
                      Consolidated Statements of Cash Flows
                                   (Unaudited)

                                                         Three Months Ended
                                                             December 31,
                                                      --------------------------
                                                         1996            1995
                                                      -----------     ----------

CASH FLOWS FROM OPERATING ACTIVITIES:
    Net earnings                                    $    842,746   $    629,161
    Noncash items-
       Depreciation of property, plant
          and equipment                                  273,319        254,964
       Amortization of intangible assets
          and deferred royalties                         498,101        272,991
       Deferred interest expense                          41,646         39,294
       Deferred income taxes                              10,494        (52,553)
    Change in current assets excluding
       cash and short-term investments                  (256,953)       685,882
    Change in current liabilities, excluding
       current portion of long term obligations        1,866,054        682,392
    Long term receivable and payable                      27,966         (7,602)
                                                     -----------    -----------
       Net cash provided by operating activities       3,303,373      2,504,529
                                                     -----------    -----------
CASH FLOWS FROM INVESTING ACTIVITIES:
    Property, plant and equipment acquired, net         (142,765)      (122,988)
    Sale of short-term investments                     8,025,890             --
                                                     -----------    -----------
       Net cash provided by (used for) investing
         activities                                    7,883,125       (122,988)

CASH FLOWS FROM FINANCING ACTIVITIES:
    Subordinated debentures offering costs               (66,293)            --
    Proceeds from other long-term obligations                 --        339,538
    Repayment of long-term obligations                   (60,769)      (225,123)
    Dividends paid                                      (856,804)      (732,975)
    Proceeds from issuance of common stock, net           25,359        (68,665)
                                                     -----------    -----------
       Net cash provided by (used for) financing
          activities                                    (958,507)      (687,225)
                                                     -----------    -----------
    Effect of exchange rate changes on cash                7,656        (15,676)
                                                     -----------    -----------
NET INCREASE (DECREASE) IN CASH AND CASH
    EQUIVALENTS                                       10,235,647      1,678,640

CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD       5,648,225      8,918,637
                                                     -----------    -----------
CASH AND CASH EQUIVALENTS AT END OF PERIOD          $ 15,883,872   $ 10,597,277
                                                    ============   ============

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
    Cash paid during the period for-
       Income taxes                                 $    119,050   $     14,500
       Interest                                           18,247         46,550
                                                    ============   ============

    Non-cash activities-
       Common stock issued from conversion of
       subordinated debentures, net of
       amortization of deferred debenture
       offering cost of $379,847 and net
       conversion cost of $77,649                   $       --     $  7,409,504
                                                    ============   ============


                                  Page 6 of 14







                   MERIDIAN DIAGNOSTICS, INC. AND SUBSIDIARIES


                   Notes to Consolidated Financial Statements
                                   (Unaudited)




(1)    Basis of Presentation-

       The  consolidated  financial  statements  included  herein  have not been
       examined by independent public  accountants,  but include all adjustments
       (consisting  of normal  recurring  entries)  which are, in the opinion of
       management,  necessary  for a fair  presentation  of the results for such
       periods.

       Certain  information  and  footnote   disclosures  normally  included  in
       financial  statements  prepared in  accordance  with  generally  accepted
       accounting  principles have been omitted  pursuant to the requirements of
       the Securities  and Exchange  Commission,  although the Company  believes
       that the disclosures  included in these financial statements are adequate
       to make the information not misleading.

       It is suggested that these consolidated  financial  statements be read in
       conjunction with the consolidated  financial statements and notes thereto
       included in the Company's latest annual report on Form 10-K.

       The results of  operations  for the interim  periods are not  necessarily
       indicative of the results to be expected for the year.


(2)    Inventories-

       Inventories are comprised of the following:



                                    December 31,         September 30,
                                        1996                  1996
                                    ------------         -------------
       Raw materials                 $1,529,334            $1,223,438
       Work-in-process                1,277,200               966,437
       Finished goods                 2,358,335             2,061,656
                                     ----------            ----------
                                     $5,164,869            $4,251,531
                                     ==========            ==========




                                        Page 7 of 14









(3)    Income Taxes-

       The provisions for income taxes were computed at the estimated annualized
       effective  tax rates  utilizing  current tax law in effect,  after giving
       effect to research and experimentation credits.


(4)    Earnings Per Common Share-

       Net earnings per share has been computed based upon the weighted  average
       number of shares  outstanding  during the periods.  No material  dilution
       results  from   outstanding   stock   options,   the  only  common  stock
       equivalents,  nor  from  the  assumed  conversion  of the 7%  Convertible
       Subordinated  Debentures  issued  September 27, 1996, due in 2006.  These
       debentures  assuming  their  conversion,  net of the pro forma  after tax
       interest expense, are anti-dilutive.  All share and per share information
       have been adjusted to reflect the  conversion  of the 7 1/4%  Convertible
       Subordinated Debentures due in 2001, called for redemption on October 10,
       1995 into  common  stock,  as well as the 3 for 2 stock  split in October
       1995.


(5)    Translation of Foreign Currency-

       Assets and liabilities of foreign operations are translated using quarter
       end exchange  rates,  and revenues  and  expenses  are  translated  using
       exchange rates prevailing  during the year with gains or losses resulting
       from  translation  included  in a  separate  component  of  shareholders'
       equity.   Gains  and  losses  resulting  from   transactions  in  foreign
       currencies were immaterial.


(6)    Reclassifications

       Certain  reclassificatons  have been made to the  accompanying  financial
       statements to conform to the December 31, 1996 presentation.

                                        Page 8 of 14







Item 2. Management's  Discussion and Analysis Of Financial Condition and Results
        of Operations

Results of Operations

Net sales  increased  $2,040,000,  or 37%, to  $7,562,000  for the first  fiscal
quarter  compared to the prior year. This increase is attributable to the strong
unit growth in the Premier product line,  primarily from the Cambridge  products
plus Toxin A, EHEC,  Giardia and H. pylori;  growth in the ImmunoCardR  line, up
over 80%  compared to the prior year,  principally  in Toxin A,  mycoplasma,  H.
pylori and  rotavirus;  ParaPakR,  up over 25%; and the Inova line of autoimmune
products in Italy, which more than tripled.

The increase in sales of $2,040,000  was comprised of volume of  $2,118,000,  or
38%, currency of $68,000, or 1%, offset by pricing of $146,000, or 2%.

European  sales for the quarter  increased  $261,000,  or 21%.  The increase was
attributable to continued  strong unit growth across the ImmunoCard  line, which
more than doubled;  growth in the Premier line, up 31%, primarily EHEC; plus the
growth in the Inova line mentioned above. This increase of $261,000 is comprised
of volume of  $287,000,  or 24%,  currency of $68,000 or 5%,  offset by price of
$94,000,  or 8%. This reduction in price is largely a result of very competitive
pricing in the German market for the EHEC product.

Gross profit increased 29% compared to the sales increase of 37% and declined as
a  percentage  of net sales to 64.2% for the first  fiscal  quarter  compared to
68.4% for the  three-month  period ended December 31, 1995. The reduction in the
gross  profit rate is largely  related to the higher costs  associated  with the
enteric  product line  acquisition  from Cambridge in June 1996. The acquisition
included,  in addition  to the  amortization  of certain  acquisition  costs,  a
one-year inventory purchase agreement at a negotiated cost expected to be higher
than the Company's  cost of  manufacturing  when the  purchased  product line is
fully  integrated  into the  Company's  manufacturing  facilities  in Cincinnati
during the third fiscal quarter of 1997.  The impact of lower pricing  mentioned
above accounts for the majority of the balance of the decline.

Total  operating  expenses  increased  $521,000,  or 19%,  for the first  fiscal
quarter versus the three months ended December 31, 1995, however,  declined over
six points as a percent of sales to 42.9% from 49.3% versus the prior year.

Research  and  development  expenses  for the  first  fiscal  quarter  increased
$58,000, or 17%, from the prior year. These increases are attributable to higher
personnel  costs and timing of  purchases  of  supplies.  The labor  increase is
related to EHEC  development  for use in food,  development  of novel  detection
assays for H. pylori and for antibody  purification  for Toxin B associated with
the transition of Cytoclone from Cambridge.  Selling and marketing  expenses are
up 32%,  primarily from U.S. sales personnel added during fiscal 1996 to provide
improved  geographic  coverage  and  penetration  of national  accounts,  higher
national  sales  meeting   expenses  and   amortization  of  certain   Cambridge
acquisition costs.  European selling and marketing expenses were relatively flat
excluding the effect of currency.  General and administrative expenses increased
3% for the first quarter. The majority of this increase is amortization expenses
associated with  Cambridge.  The balance of the increase stems from the currency
effect of the stronger lira versus the dollar.


                                        Page 9 of 14







Operating  income as a result of the above increased  $555,000,  or 53%, for the
first fiscal quarter and improved over 2 points as a percent of sales.

Other  income/(expense)  increased  $202,000 for the quarter.  This  increase in
expense is directly  attributable to the interest expense of $350,000 associated
with the 7% Convertible  Subordinated  Debentures due 2006,  issued in September
1996. For the same quarter last year,  debenture  interest  expense was $43,000.
The increase in interest income reflects the increased  amount of cash (from the
debentures)  invested during the period.  Gains/losses in foreign  exchange were
not material during the periods.  The cumulative  foreign  currency  translation
adjustment  changed by $12,000 during the quarter as a result of the U.S. dollar
softening against the lira during the period.

The  Company's  effective  tax rate  declined  marginally to 40% from 41% in the
prior year.


Liquidity and Capital Resources

Net cash flow provided by operations  increased $799,000,  or 32%, to $3,303,000
for the three month period ended  December 31, 1996.  This increase is primarily
from the growth in accounts  payable as a result of the purchase of  inventories
associated with the Cambridge acquisition, up $1,378,000, the reduction in trade
accounts  receivable,  down  $1,197,000  and the timing of income  tax  payments
offset by increases in inventories and prepaid expenses.

Net cash provided by investing  activities  increased  $8,006,000 as a result of
the sale of short term  investment  with  maturities  greater than 90 days which
have been  reinvested into maturities of less than 90 days and reflected in Cash
and Cash  Equivalents  of  $15,884,000.  Net cash used for financing  activities
increased $271,000, the major items being higher dividend payments including the
year end special cash dividend of $0.025 per share plus expenses associated with
the issuance of the 7% debentures due in 2006.

Net cash flow from  operations  is expected to continue to fund working  capital
requirements.  Currently,  the Company has an unused  $10,000,000 line of credit
with a commercial bank and cash and short-term investments of $21,952,000.



                                        Page 10 of 14







Recently Issued Accounting Standards

In March 1995, the Financial  Accounting Standards Board (FASB) issued Statement
No. 121 (Statement 121) on "Accounting  for the Impairment of Long-lived  Assets
and for  Long-lived  Assets to be Disposed Of."  Statement 121 is required to be
applied  prospectively  for  assets  to be held  and  used.  Statement  121 also
establishes  accounting standards for long-lived assets that are to be disposed.
The initial application of Statement 121 to assets held for disposal is required
to be reported as the cumulative effect of a change in accounting principle. The
Company  is  required  to adopt  Statement  121 in 1997  and,  based on  current
circumstances, the effect of the adoption will not have a material effect on its
financial position or results of operations.

In October 1995, the FASB issued Statement of Financial Accounting Standards No.
123  (Statement  123)  "Accounting  for Stock Based  Compensation"  establishing
financial   accounting  and  reporting   standards  for   stock-based   employee
compensation  plans.  Statement 123  encourages  the use of the fair value based
method to measure compensation cost for stock-based employee compensation plans;
however,  it also  continues  to allow  the  intrinsic  value  based  method  of
accounting as  prescribed by APB Opinion No. 25, which is currently  used by the
Company. If the intrinsic value based method continues to be used, Statement 123
requires pro forma  disclosures of net income and earnings per share,  as if the
fair value based method of  accounting  had been  applied.  The fair value based
method requires that  compensation cost be measured at the grant date based upon
the value of the award and recognized over the service period, which is normally
the vesting period.  The Company  adopted  Statement 123 in fiscal 1997 and will
make the required  footnote  disclosures only.  Therefore,  the adoption of this
Statement will not have a material effect on the Company's financial position or
results of operations.


                                        Page 11 of 14








                           PART II. OTHER INFORMATION



Item 5.  Other Information



On November 1, 1996,  the  Paul-Ehrlich  Institute in Germany  approved  Premier
EHEC, the diagnostic  test for E. coli bacterial  toxins.  While often linked to
under-cooked  meat,  E. coli  toxins  have been found in fruit  juice,  drinking
water, produce and raw milk. Premier EHEC and a companion product, Premier 0157,
have played a key role in ensuring the safety of Germany's milk products.



                                        Page 12 of 14








Item 6.   Exhibits and Reports on Form 8-K.

     (a)  Exhibits-

     Exhibit No.            Description                                  Page(s)
     -----------            ----------------------------------------     -------
          11                Computation of earnings per common share          14
          27                Financial Data Schedule                        15-17


     (b)   Reports on Form 8-K - None


Signature

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
     Registrant  has duly  caused  this report to be signed on its behalf by the
     undersigned there-unto duly authorized.




                                          MERIDIAN DIAGNOSTICS, INC.



Date:    January 27, 1997                /S/     GERARD BLAIN
       --------------------              --------------------------------------
                                             GERARD BLAIN, Vice President,
                                             Chief Financial Officer (Principal
                                                 financial officer)



                                  Page 13 of 14