Epidemiological Immunological Studies on Leprosy in Okinawa. 6. Lepromin, Lymphocyte Transformation,:FLA-ABS and Leproagglutination Tests in the In-and Out-patients with Leprosy and the Relationships among these Tests and Personal or Family History or Cli
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In-and out-patients with leprosy in Okinawa were surveyed by using the following im-munological tests: cutaneous reaction to Mitsuda's lepromin (40 million bacilli/ml) (LPR), lymphocyte transformation test with Dharmendara's antigen (DL-LTT), that with phyto-hemagglutinin (PHA-LTT), fluorescent leprosy antibody absorption test (FLA-ABS) and Leproagglutination test with cardiolipin-lecithin antigen (LAT). A correlation between two tests and a relationship between the test and personal or family history or clinical finding of the patients were evaluated by non-parametric statistics. Spearman's rank cor-relation coefficient was significant between LPR and DL-LTT, while a reverse correlation was found beween LPR and FLA-ABS, DL-LTT and FLA-ABS, and DL-LTT and LAT, respectively.High reactivity in PHA-LTT was found in almost all of patients, irrespective of type and stage of leprosy, suggesting general immune responsiveness of leprosy patients in Okinawa. The other tests showed a significant difference in the mean rank of reaction values according to clinical findings such as type and stage of leprosy, property of skin lesion, loss of eyebrow, and bacteriological test. The use of LPR and DL-LTT for the study of cell-mediated immunity in leprosy was therefore confirmed. FLA-ABS was found useful for early serodiagnosis, while LAT for the study of autoimmunity in leprosy.None of these immunological tests showed significant difference among the subgroups of patients classified by the following items: presence or absence of consanguineous patient with leprosy, living place, place of onset, presence or absence of neural symptoms such as the enlargement of peripheral nerve, claw hand and facial palsy, ocular and nasal involvement, ENL in lepromatous and borderline leprosy and conditions in the treatment. On the other hand, LPR showed higher reactivity in female than in male, in the patients at home than those discharged, and in the patients with drop foot than those without. Higher reactivity of DL-LTT was also found in male than in female and in the patients with plantar ulcer than those without. FLA-ABS reactivity was significantly higher in the discharged patients than the inpatients, in the period of 5 to 9 years after onset than that of 20 or more years, but the reactivity was lower in the patients with drop foot than those without. LAT reactivity was significantly higher in the 30-39 years old patients than 0-19 years old, and in the patients with physical work than those with mental. These findings were discussed by comparing with those described in the previous papers of this series and from immunological point of view on leprosy.
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