| Name | lymphocyte transformation test (LTT) |
| Specimen requirements | 10 ml of heparin blood and 10 ml of serum |
| Procedure remarks | Do not chill blood; rapid transport to the laboratory (within 24 h max.); indicate all allergens and send in any suspicious substances. |
| Clinical utility | mitogenic detection of a type 4 allergy of the delayed type, special allergies to medication |
| Methodology | lymphocyte stimulation test, leukocyte release test |
| Reference ranges | See findings report |
| Remarks | Testing currently takes place in a contract laboratory |