<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF NATIONAL DIAGNOSTICS, INC. FOR THE 3 MONTHS ENDED JUNE
30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                          72,874
<SECURITIES>                                 1,800,000
<RECEIVABLES>                                3,076,765
<ALLOWANCES>                                   735,755
<INVENTORY>                                          0
<CURRENT-ASSETS>                             4,374,035
<PP&E>                                       9,981,296
<DEPRECIATION>                               3,925,262
<TOTAL-ASSETS>                              10,945,807
<CURRENT-LIABILITIES>                        4,988,043
<BONDS>                                      4,191,769
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         1,164
<OTHER-SE>                                   1,176,831
<TOTAL-LIABILITY-AND-EQUITY>                10,945,807
<SALES>                                              0
<TOTAL-REVENUES>                             2,612,347
<CGS>                                                0
<TOTAL-COSTS>                                1,497,338
<OTHER-EXPENSES>                             1,257,362
<LOSS-PROVISION>                               128,014
<INTEREST-EXPENSE>                             188,528
<INCOME-PRETAX>                               (458,895)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (458,895)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (458,895)
<EPS-PRIMARY>                                     (.17)
<EPS-DILUTED>                                     (.17)