Exhibit 10.1-5

                            THIRD AMENDMENT TO LEASE

         This Third  Amendment  to Lease,  made and entered into as of this 11th
day of August, 1999 by and between Crocker Realty, L.P. (hereinafter referred to
as "Lessor"),  a Delaware limited  liability  company,  Successor in interest to
Connecticut  General Life Insurance Company on behalf of its Separate Account R,
and Immucor, Inc., a Georgia corporation (hereinafter referred to as "Lessee").

                                   WITNESSETH:

         Whereas,  Lessor's  predecessor  in interest and Lessee  entered into a
Lease Agreement  dated as of February 2, 1996 for the Premises  located in Suite
600 at 3130 Gateway  Drive,  and Suite 400, 450, and 500 at 3150 Gateway  Drive,
Norcross,  Georgia 30071,  containing  47,452 square feet,  which was amended by
that certain First  Amendment to Lease  Agreement  dated March 8, 1998 and which
was further  amended by that certain Second  Amendment to Lease  Agreement dated
August 18, 1998 (such Lease  Agreement as so amended by the First  Amendment and
the Second Amendment is hereinafter referred to as the "Lease")

         Whereas, Lessor and Lessee desire to further amend the Lease in certain
respects:

         Now,  Therefore,  in consideration of the Premises,  the sum of Ten and
no/100 Dollars ($10.00) in hand paid by Lessee to Lessor, and for other good and
valuable  consideration,   the  receipt  and  sufficiency  of  which  is  hereby
acknowledged, the parties hereto agree as follows:

1.       Premises:

         As of  September  1, 1999,  the  Premises  shall be expanded to include
         13,453  rentable  square  feet  in  Suite  200 at 2975  Gateway  Drive,
         Norcross,  Georgia  30071  (hereinafter  referred to as the  "Expansion
         Premises"  and  attached  hereto on Exhibit  "A").  The new size of the
         Premises shall be 67,143 rentable square feet.

2.       Extension:

         In further  reference to Paragraph 1 of the First Amendment,  the Lease
         shall be extended for  twenty-eight  (28) months from April 30, 2003 to
         August 31, 2005.

3.       Base Rent:

         The base rent for the Expansion Premises shall be as follows:

-------------------- ------------------ ------------------- ------------------
    Period             Per Square Foot      Period Total          Monthly
-------------------- ------------------ ------------------- ------------------

9/1/99-8/31/00             $4.00              $53,812.00          $4,484.33
-------------------- ------------------ ------------------- ------------------

9/1/00-4/30/01             $7.76              $69,596.85           $8,699.61
-------------------- ------------------ ------------------- ------------------

5/1/01-4/30/02             $8.07              $108,571.09          $9,047.59
-------------------- ------------------ ------------------- ------------------

5/1/02-4/30/03             $8.39              $112,913.93          $9,409.49
-------------------- ------------------ ------------------- ------------------

5/1/03-4/30/04             $8.73              $117,430.49          $9,785.87
-------------------- ------------------ ------------------- ------------------

5/1/04-4/30/05             $9.08              $122,127.71          $10,177.31
-------------------- ------------------ ------------------- ------------------

5/1/04-8/31/05             $9.44              $42,337.61            $10,584.40
-------------------- ------------------ ------------------- ------------------


         In further  reference  to Section 3 and Special  Stipulation  36 of the
         Lease,  Lessee  shall  pay  rent on the  entire  Premises  based on the
         following schedule:


-------------------- ------------------ ------------------- ------------------
    Period             Per Square Foot      Period Total          Monthly
-------------------- ------------------ ------------------- ------------------

9/1/99-8/31/00             $6.76               $454,167.60         $37,847.30
-------------------- ------------------ ------------------- ------------------

9/1/00-4/30/01             $7.76               $347,353.12         $43,419.14
-------------------- ------------------ ------------------- ------------------

5/1/01-4/30/02             $8.07               $541,870.87         $45,155.91
-------------------- ------------------ ------------------- ------------------

5/1/02-4/30/03             $8.39               $563,545.70         $46,962.14
-------------------- ------------------ ------------------- ------------------

5/1/03-4/30/04             $8.73               $586,087.53         $48,840.63
-------------------- ------------------ ------------------- ------------------

5/1/04-4/30/05             $9.08               $609,531.03         $50,794.25
-------------------- ------------------ ------------------- ------------------

5/1/05-8/31/05             $9.44               $211,304.09         $52,826.02
-------------------- ------------------ ------------------- ------------------

4.       Improvement Allowance:

         Lessor shall provide a Tenant Improvement  Allowance to Lessee pursuant
         to the provisions in the attached Exhibit "B".

5.       Liens:

         As stated in  Section 16 of the  Lease,  in no event  shall any work be
         done which would allow a lien to be placed  against the  Premises.  Any
         such lien  shall  create a default  of Lessee  under  this Lease if not
         removed  or  lawfully  bonded  with ten (10)  calendar  days  following
         Lessor's discovery thereof.

6.       Pro-Rata Share
         Tenant's pro-rata share of the entire Property for calculation purposes
         shall be thirty and 69/100 percent (30.69%).

7.       Section 38,  Renewal  Option,  of the Lease shall be based upon the new
         expiration date as set forth in Paragraph 2 above.

Except as  expressly  amended  hereby,  the Lease shall remain in full force and
effect.


<PAGE>



          In Witness Whereof, the parties hereto have set their hand and seal as
 of the day and year first above written.

                   Lessor:

                   Crocker Realty, L.P., a Delaware limited partnership

                   By:     CRT-GP, LLC, a Delaware limited liability
                            company, its sole general partner

                   By:     Crocker Operating Partnership, L.P., a Delaware
                            limited partnership, its sole member

                   By:     Crocker Realty Trust, Inc., a Maryland
                            corporation, its sole general partner

                   By:      /s/ Christopher L. Becker
                   Name:     Christopher L. Becker
                   Title:    Vice President

                   [Corporate Seal]





                    Lessee:  Immucor, Inc.,
                              a Georgia Corporation.

                    By:     /s/ Ralph A. Eatz
                    Name:   Ralph A. Eatz
                    Its:    Sr. V.P. of Operations


                   [Corporate Seal]


<PAGE>


                                   EXHIBIT "B"

                               TENANT IMPROVEMENTS
                                 [Tenant Builds]


         Landlord has made no  representation  or promise as to the condition of
the  Premises.  Landlord  shall  not  perform  any  alterations,  additions,  or
improvements in order to make the Premises  suitable and ready for occupancy and
use by Tenant.  Tenant has inspected the  Premises,  is fully  familiar with the
physical  condition  of the  Premises,  and shall  accept the  Premises "as is,"
"where is," without any warranty,  express or implied,  or  representation as to
fitness or suitability.

         Tenant  shall  perform all work  necessary  or  desirable  for Tenant's
occupancy of the Premises (the "Tenant Improvements"). Within 150 days after the
Date of the Lease,  Tenant shall  furnish to Landlord,  for  Landlord's  written
approval, a permit set (final construction  drawings),  if applicable,  of plans
and  specifications  for the Tenant  Improvements  (the "Plans").  If and to the
extent appropriate,  considering the nature of the improvements, the Plans shall
include the  following if  applicable:  fully  dimensioned  architectural  plan;
electric/telephone outlet diagram;  reflective ceiling plan with light switches;
mechanical  plan;  furniture plan;  electric power circuitry  diagram;  plumbing
plans;  all color and finish  selections;  all  special  equipment  and  fixture
specifications; and fire sprinkler design drawings.

         The  Plans  shall  comply  with  all   applicable   laws,   ordinances,
directives,  rules,  regulations,  and other requirements imposed by any and all
governmental  authorities  having or asserting  jurisdiction  over the Premises.
Landlord  shall  review the Plans and  either  approve or  disapprove  them,  in
Landlord's sole discretion,  within a reasonable period of time. Should Landlord
disapprove  them,  Tenant shall make any necessary but reasonable  modifications
and  resubmit  the Plans to  Landlord  in final form  within ten days  following
receipt of Landlord's disapproval of them. The approval by Landlord of the Plans
and any  approval by Landlord of any similar  plans and  specifications  for any
other Alterations or the supervision by Landlord of any work performed on behalf
of  Tenant   shall  not  (i)  imply   Landlord's   approval  of  the  plans  and
specifications  as to quality of design or  fitness  of any  material  or device
used;  (ii) imply that the plans and  specifications  are in compliance with any
codes or other  requirements  of  governmental  authority  (it being agreed that
compliance with these  requirements is solely  Tenant's  responsibility);  (iii)
impose any liability on Landlord to Tenant or any third party;  or (iv) serve as
a waiver or forfeiture of any right of Landlord.  The Tenant  Improvements shall
be constructed by a general contractor  selected and paid by Tenant and approved
by  Landlord.  A copy  of the  contractor's  license(s)  to do  business  in the
jurisdiction(s)  in which the Premises are located,  the fully executed contract
between  Tenant  and the  general  contractor,  the  general  contractor's  work
schedule, and all building or other governmental permits required for the Tenant
Improvements  shall be delivered to landlord prior to commencement of the Tenant
Improvements. Tenant shall cooperate as reasonably necessary so that its general
contractor will cause the Tenant  Improvements to be completed promptly and with
due diligence. The Tenant Improvements shall be performed in accordance with the
Plans and shall be done in a good and  workmanlike  manner using new  materials.
All work shall be done in  compliance  with all other  applicable  provisions of
this  Lease  and  with  all  applicable  laws,  ordinances,  directives,  rules,
regulations,  and other  requirements of any governmental  authorities having or
asserting jurisdiction over the Premises.  Prior to the commencement of any work
by  Tenant,  Tenant  shall  furnish  to  landlord  certificates  evidencing  the
existence of  builder's  risk,  comprehensive  general  liability,  and workers'
compensation  insurance  complying  with  the  requirements  set  forth  in  the
Insurance  section of this Lease. Any damage to any part of the Building Project
that occurs as a result of the Tenant Improvements shall be promptly repaired by
Tenant.

         Tenant shall also ensure  compliance  with the  following  requirements
concerning construction:

1.Tenant and all  construction  personnel  shall  abide by  Landlord's  job site
  rules  and  regulations  and  fully  cooperate  with  Landlord's  construction
  representatives  in coordinating all  construction  activities in the Building
  Project,  including,  but not limited  to,  rules and  regulations  concerning
  working hours and parking.

2.Tenant  shall be  responsible  for  cleaning up any refuse or other  materials
  left behind by construction personnel at the end of each work day.

3.Tenant  shall  deliver  to  Landlord  all forms of  approval  provided  by the
  appropriate  local  governmental   authorities  to  certify  that  the  Tenant
  Improvements  have been  completed  and the Premises are ready for  occupancy,
  including,  but  not  limited  to,  a  final,   unconditional  certificate  of
  occupancy.

4.At all times during  construction,  Tenant shall allow Landlord  access to the
  Premises for inspection  purposes.  On completion of the Tenant  Improvements,
  Tenant's general contractor shall review the Premises with Landlord and Tenant
  and secure the Landlord's and Tenant's acceptance of the Tenant Improvements.

         If and for as long as Tenant is not in default  under this Lease beyond
any  applicable  grace period,  Tenant shall be entitled to a fixed price tenant
improvement  allowance  in the  amount of  $75,000.00.  The  tenant  improvement
allowance shall be paid to Tenant in  reimbursement  for the total out of pocket
costs paid by Tenant for the Tenant  Improvements.  If the total  amount paid by
Tenant  for  the  Tenant  Improvements  is  less  than  the  tenant  improvement
allowance,  Tenant shall not receive  cash or any credit  against rent due under
this  Lease for the  unused  portion of the  allowance.  The tenant  improvement
allowance  shall be paid within 21 days after all of the  following  events have
occurred:  (i) the Tenant Improvements have been substantially  completed;  (ii)
Tenant has delivered to Landlord  final  releases of lien from Tenant's  general
contractor and all lienors giving notice and a final contractor's affidavit from
the  general  contractor  and all  other  receipts  and  supporting  information
concerning  payment for the work that  Landlord may  reasonably  request;  (iii)
Tenant has moved into the Premises and opened for business in the Premises;  and
(iv) Tenant has paid the rent due for the first month of the Lease Term.  Tenant
shall  provide  Landlord with true copies of bills paid by Tenant for the Tenant
Improvements,  and Landlord shall  reimburse  Tenant for the amount set forth in
the bills up to the amount of the allowance.  At Landlord's  option,  the tenant
improvement  allowance or any portion of it may be paid by Landlord  directly to
the  general  contractor  performing  the Tenant  Improvements  or to any lienor
giving  notice.  If Tenant is in default under this Lease beyond any  applicable
grace period,  Landlord may, in addition to all its other  available  rights and
remedies,  withhold  payment  of any unpaid  portion  of the tenant  improvement
allowance,  even if Tenant has already  paid for all or a portion of the cost of
the Tenant Improvements.

         The  tenant  improvement  allowance  is being  paid by  Landlord  as an
inducement  to Tenant  to enter  into this  Lease and as  consideration  for the
execution of this Lease by Tenant and the performance by Tenant under this Lease
for the full Lease Term.  If after Tenant has been granted all or any portion of
the allowance, the Lease Term is thereafter terminated by virtue of a default by
Tenant or Landlord resumes possession of the Premises consequent on a default by
Tenant,  and Landlord is precluded by applicable  law from  collecting  the full
amount of damages attributable to the default as provided in the Default section
of this Lease,  then, in addition to all other  available  damages and remedies,
Landlord shall also be entitled to recover from Tenant the  unamortized  portion
(calculated  using an interest rate of 12% per annum compounded  monthly) of the
tenant  improvement  allowance,  which  sum  shall  not  be  deemed  rent.  This
obligation of Tenant to repay the unamortized  balance of the tenant improvement
allowance to Landlord shall survive the expiration or sooner  termination of the
Lease Term.

The tenant improvement  allowance  provisions of this exhibit shall not apply to
any additional  space added to the original  Premises at any time after the Date
of this Lease,  whether by any options under this Lease or otherwise,  or to any
portion of the original  Premises or any  additions to the Premises in the event
of a renewal or extension of the initial  Lease Term,  whether under any options
under this Lease or otherwise,  unless expressly so provided in this Lease or an
amendment to this Lease.