<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF NATIONAL DIAGNOSTICS, INC. FOR THE THREE MONTHS ENDED
JUNE 30, 1998, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                               0
<SECURITIES>                                 1,874,618
<RECEIVABLES>                                3,197,417
<ALLOWANCES>                                   678,417
<INVENTORY>                                          0
<CURRENT-ASSETS>                             2,660,551
<PP&E>                                       9,976,773
<DEPRECIATION>                               5,235,994
<TOTAL-ASSETS>                               9,752,369
<CURRENT-LIABILITIES>                        8,719,932
<BONDS>                                        732,388
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                  1,475,260
<COMMON>                                         1,936
<OTHER-SE>                                  (1,177,147)
<TOTAL-LIABILITY-AND-EQUITY>                 9,752,369
<SALES>                                              0
<TOTAL-REVENUES>                             5,118,294
<CGS>                                                0
<TOTAL-COSTS>                                2,625,208
<OTHER-EXPENSES>                             2,762,564
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             328,185
<INCOME-PRETAX>                               (516,189)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (516,189)
<EPS-PRIMARY>                                    (4.04)
<EPS-DILUTED>                                        0