HEMAGEN DIAGNOSTICS INC
SC 13D/A, 1999-07-13
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                  SCHEDULE 13D
                                 (Rule 13d-101)

    INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a)
             AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a)

                                (Amendment No. 1)


                            Hemagen Diagnostics, Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)



                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                   423501 105
- --------------------------------------------------------------------------------
                                 (CUSIP Number)


                               Mark A. Weiss, Esq.
                           Keating, Muething & Klekamp
                       One East Fourth Street, 18th Floor
                             Cincinnati, Ohio 45202
                                 (513) 579-6411
- --------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)


                                  July 7, 1999
- --------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


         If the filing person has  previously  filed a statement on Schedule 13G
     to report the acquisition that is the subject of this Schedule 13D, and is
filing this schedule because of Rule 13d-1(e),  13d-1(f) or 13d-1(g),  check the
following box [ ].

                       (Continued on the following pages)

<PAGE>

  CUSIP No. 423501 105                13D                   Page 2 of 8  Pages
- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          Jerry L. Ruyan
- --------------------------------------------------------------------------------
 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*        (a)    [X]
                                                                   (b)    [ ]

- --------------------------------------------------------------------------------
 3        SEC USE ONLY

- --------------------------------------------------------------------------------
 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------
 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
          TO ITEM 2(d) or 2(e)                                               [ ]

- --------------------------------------------------------------------------------
 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States citizen
- --------------------------------------------------------------------------------
                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES             ---------------------------------------------------
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      684,854 - See Item 5(I)(b)
         REPORTING           ---------------------------------------------------
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     345,154 - See Item 5(I)(b)
                             ---------------------------------------------------
                             10      SHARED DISPOSITIVE POWER

                                     -0-
- --------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          684,854 - See Item 5(I)(a)
- --------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*                                                    [ ]

- --------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          8.7%
- --------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

          IN
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


  CUSIP No. 423501 105                13D                   Page 3 of 8  Pages
- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

           William P. Hales
- --------------------------------------------------------------------------------
 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*        (a)    [X]
                                                                   (b)    [ ]

- --------------------------------------------------------------------------------
 3        SEC USE ONLY

- --------------------------------------------------------------------------------
 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------
 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
          TO ITEM 2(d) or 2(e)                                               [ ]

- --------------------------------------------------------------------------------
 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States citizen
- --------------------------------------------------------------------------------
                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES             ---------------------------------------------------
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      684,854 - See Item 5(II)(b)
         REPORTING           ---------------------------------------------------
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     249,600 - See Item 5(II)(b)
                             ---------------------------------------------------
                             10      SHARED DISPOSITIVE POWER

                                     -0-
- --------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          684,854 - See Item 5(II)(a)
- --------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*                                                   [ ]

- --------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          8.7%
- --------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

          IN
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>

<PAGE>


  CUSIP No. 423501 105                13D                   Page 4 of 8  Pages
- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

           Thomas A. Donelan
- --------------------------------------------------------------------------------
 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*        (a)    [X]
                                                                   (b)    [ ]

- --------------------------------------------------------------------------------
 3        SEC USE ONLY

- --------------------------------------------------------------------------------
 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------
 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
          TO ITEM 2(d) or 2(e)                                               [ ]

- --------------------------------------------------------------------------------
 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States citizen
- --------------------------------------------------------------------------------
                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES             ---------------------------------------------------
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      684,854 - See Item 5(III)(b)
         REPORTING           ---------------------------------------------------
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     50,100
                             ---------------------------------------------------
                             10      SHARED DISPOSITIVE POWER

                                     -0-
- --------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          684,854 - See Item 5(III)(a)
- --------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*                                                   [ ]

- --------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          8.7%
- --------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

          IN
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


 CUSIP No. 423501 105                13D                   Page 5 of 8  Pages
- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

           Christopher P. Hendy
- --------------------------------------------------------------------------------
 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*        (a)    [X]
                                                                   (b)    [ ]

- --------------------------------------------------------------------------------
 3        SEC USE ONLY

- --------------------------------------------------------------------------------
 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------
 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
          TO ITEM 2(d) or 2(e)                                               [ ]

- --------------------------------------------------------------------------------
 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States citizen
- --------------------------------------------------------------------------------
                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES             ---------------------------------------------------
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      684,854 - See Item 5(IV)(b)
         REPORTING           ---------------------------------------------------
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     40,000
                             ---------------------------------------------------
                             10      SHARED DISPOSITIVE POWER

                                     -0-
- --------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          684,854 - See Item 5(IV)(a)
- --------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*                                                   [ ]

- --------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          8.7%
- --------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

             IN
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


     This Amendment No. 1 to Schedule 13D is being filed solely to amend Items 4
and 5.

Item 4.  Purpose of Transaction.

          Mr.  Ruyan  resigned  as a  director  of  Meridian  Diagnostics,  Inc.
          effective as of July 7, 1999.

Item 5.  Interest in Securities of Issuer.

          I.   Jerry L. Ruyan

               (a)  See page 2, nos. 11 and 13. No. 11 includes 122,227 warrants
                    to  purchase  Common  Stock,  all  of  which  are  currently
                    exercisable.

               (b)  See page 2, nos.  7-10. No. 8 includes  122,227  warrants to
                    purchase  Common Stock.  No. 9 includes  72,727  warrants to
                    purchase  Common  Stock.  All such  warrants  are  currently
                    exercisable.

               (c)  The following  market  transactions are all trades involving
                    the  Common  Stock  made in the last 60 days  that  were not
                    previously reported:

                                    Purchase         Number           Price
                     Date           or Sale         of Shares        Per Share
                     ----           --------        ---------        ---------
                    6/29/99         Purchase          3,000           $1.38

               (d)  None.

               (e)  Not Applicable.

          II.  William P. Hales

               (a)  See page 3, nos. 11 and 13. No. 11 includes 122,227 warrants
                    to  purchase  Common  Stock,  all  of  which  are  currently
                    exercisable.

               (b)  See page 3, nos.  7-10. No. 8 includes  122,227  warrants to
                    purchase  Common Stock.  No. 9 includes  49,500  Warrants to
                    purchase  Common  Stock.  All such  warrants  are  currently
                    exercisable.

               (c)  All  trades  in the  Common  Stock in the last 60 days  were
                    previously reported.

               (d)  None.

               (e)  Not Applicable.

          III. Thomas A. Donelan

               (a)  See page 4, nos. 11 and 13. No. 11 includes 122,227 warrants
                    to  purchase  Common  Stock,  all  of  which  are  currently
                    exercisable.

               (b)  See page 4, nos.  7-10. No. 8 includes  122,227  warrants to
                    purchase   Common   Stock,   all  of  which  are   currently
                    exercisable.

               (c)  The following  market  transactions are all trades involving
                    the  Common  Stock  made in the last 60 days  that  were not
                    previously reported:

<PAGE>

                                    Purchase         Number           Price
                     Date           or Sale         of Shares        Per Share
                     ----           --------        ---------        ---------
                    6/28/99         Purchase          25,000           $1.38
                    6/29/99         Purchase          25,000            1.38

               (d)  None.

               (e)  Not Applicable.

          IV.  Christopher P. Hendy

               (a)  See page 5, nos. 11 and 13. No. 11 includes 122,227 warrants
                    to  purchase  Common  Stock,  all  of  which  are  currently
                    exercisable.

               (b)  See page 5, nos.  7-10. No. 8 includes  122,227  warrants to
                    purchase   Common   Stock,   all  of  which  are   currently
                    exercisable.

               (c)  The following  market  transactions are all trades involving
                    the  Common  Stock  made in the last 60 days  that  were not
                    previously reported:

                                    Purchase         Number           Price
                     Date           or Sale         of Shares        Per Share
                     ----           --------        ---------        ---------
                     6/29/99        Purchase          3,500             $1.31
                     7/1/99         Purchase          5,000              1.25

               (d)  None.

               (e)  Not Applicable.

          V.   Messrs. Ruyan, Hales, Donelan and Hendy

               (a)  684,854  shares  or  8.7%.   Includes  122,227  warrants  to
                    purchase   Common   Stock,   all  of  which  are   currently
                    exercisable.

               (b)  See pages 2 -5, nos. 7-10.  Items 8 and 11 include  warrants
                    to purchase 122,227 shares of Common Stock, all of which are
                    currently exercisable.

               (c)  See (I)(c), (II)(c), III(c) and IV(c) above.

               (d)  None.

               (e)  Not Applicable.


Dated: July 12, 1999                                 *
                                                     ---------------------------
                                                     Jerry L. Ruyan




                                                     *
                                                     ---------------------------
                                                     William P. Hales



                                                     *
                                                     ---------------------------
                                                     Thomas A. Donelan



                                                     *
                                                     ---------------------------
                                                     Christopher P. Hendy




                                                     *By: /s/Mark A. Weiss
                                                     ---------------------------
                                                          Mark A. Weiss
                                                          Attorney-in-Fact


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