As I designed in Medinfo, this is a much simpler algorithm than HCV and uses an HTLV-1/HTLV-2 screening test and a confirmatory linear immunoblot assay LIA that can discriminate between type 1 and type 2.  If there is an indeterminate result, a repeat test is ordered after 6 months:

1. HTLV 1/2 Testing:
   1. HTLV Antibodies positive, then do HTLV-InnoLIA:
      1. HTLV InnoLIA positive for HTLV-1 and/or HTLV-2:  refer to Infectious Disease clinic
      2. HTLV InnoLIA indeterminate or negative, repeat HTLV Ab and HTLV InnoLIA testing after 6 months
   2. Repeat HTLV Testing After 6 Months:
      1. HTLV 1/2 antibodies positive, permanent deferral and do HTLV InnoLIA
      2. HTLV 1/2 antibodies indeterminate,  permanent deferral and do HTLV InnoLIA
      3. HTLV InnoLIA positive for HTLV-1 or HTLV-2: refer to Infectious Disease clinic
      4. HTLV InnoLIA indeterminate, donor permanently deferred.
         1. Issue letter HTLV-Not Confirmed
      5. HTLV 1/2 Ab negative and HTLV InnoLIA negative, reenter donor.

This is translated into the following Medinfo processes:

To Be Continued:

15/8/20