OBJECTIVES: Leprosy remains a public health concern in Malaysia and globally. We aim to review the characteristics of leprosy patients in a tertiary institution in urban Malaysia.
DESIGN: This is a case series of 27 leprosy patients who presented between 2008 and 2013.
RESULTS: The majority of our patients consisted of male (74.1%), Malaysian (63.0%), blue collar workers (51.9%) and married (59.3%) patients; 48.1% had lepromatous leprosy. All except one of the patients presented with skin lesions, 25.9% had nerve involvement and 33.3% developed lepra reactions. Forty-four point four percent (44.4%) of the cases seen initially in the primary care setup were misdiagnosed.
CONCLUSIONS: Doctors need to have a high index of suspicion for leprosy when patients present with suggestive skin, nerve or musculoskeletal lesions. Immigrants accounted for 37% of cases and these patients may become a reservoir of infection, thus accounting for the rise in incidence. An increasing trend in multibacillary cases may be attributed to the spread from migrants from countries with a high burden of leprosy.
The loss of alveolar bone supporting the maxillary central incisors and the general periodontal conditions were evaluated after 14 years in the 12 patients remaining from an original group of 47 under treatment in Malaysia. Alveolar bone loss was minimal during this period even in the presence of periodontal inflammation. These data suggest that treatment protects patients with leprosy from alveolar bone loss and suggests that other skeletal deformities might respond similarly.
The proliferative responses of peripheral blood mononuclear cells (PBMC) to Mycobacterium leprae and BCG were studied in two groups of leprosy patients: a group of 8 lepromatous patients who had been on treatment for more than 20 years (TLL) and a group of 8 untreated lepromatous leprosy patients (ULL). The mean response to M. leprae of the TLL group was 6195 cpm with 5 of the 8 patients responding positively. The mean response to M. leprae of the ULL group was 617 cpm, with only 1 patient showing a positive response. The corresponding proliferative responses to BCG were 19,908 cpm in the TLL group and 7908 in the ULL group. Thirteen M. leprae reactive clones were established from 2 TLL patients and 5 M. leprae reactive clones were established from 2 tuberculoid leprosy patients. Seven of these clones, 4 from the TLL patients and 3 from the tuberculoid (TT) patients could be studied further. Three of the TLL clones responded specifically to M. leprae, while one of the clones exhibited a broad cross-reactivity to other mycobacteria. All of these clones were of the CD4+CD8- phenotype. Our findings suggest that responsiveness to M. leprae can be detected in vitro in a proportion of LL patients who have undergone prolonged chemotherapy, and that this response involves M. leprae reactive CD8+CD8- T cells, of which some appear to be specific to M. leprae.
This is an interesting comparison between the types of leprosy seen among Chinese, Malays and Indians in Malaya, based on a large experience. The disease is most virulent among Chinese and least so among Indians, three-fourths of the cases among the latter being of mild tuberculoid disease with a tendency to self-healing, but among the Chinese only one-third are of the tuberculoid type. The climate of Malaya is of the hot humid type, in which leprosy flourishes. On the other hand, a higher standard of living than in India tends to hinder the spread of the disease. The age incidence is important. Among, the Chinese, early macules are commonly found in children of 5 to 15 years of age, most of which tend to clear up, but in about one-fourth tuberculoid lesions develop and may go on to the lepromatous condition, especially if the onset of the tuberculoid stage occurs early. When a reliable history is obtained in Chinese, in nearly every lepromatous case a tuberculoid stage was first observed, commonly in the age group 16-40. In a smaller number of persons of over 40 years of age, the proportion of tuberculoid cases is very much higher, but the tendency to become lepromatous is very much less. Major tuberculoid cases are more liable than minor to become lepromatous, but nerve thickening in tuberculoid leprosy is less evident in Chinese than in Indians and it is rare in children and in those over 40. In view of the foregoing peculiarity of the evolution of leprosy in tuberculoid cases in Chinese subjects, active treatment is necessary, in order to prevent them becoming lepromatous. For this purpose, intradermal injections are of little value and they tend to obscure any evolutionary changes. Hydnocarpus oil or esters (deep subcutaneous injections) should therefore be pushed to the limit of tolerance in doses of 1 cc. per 10 pounds body weight twice weekly, or 30 cc. per week, for a patient of 150 Ibs. as a minimum and increased by at least fifty per cent, in acute or reacting cases, when improvement may be expected within three months. Some years' experience of this intensive treatment as compared with weekly injections of 1-5 cc. has shown much more marked improvement and much less incidence of lepromatous change with the high doses. In lepromatous cases, reactions should be avoided, but dosage should be as high as possible short of producing increased erythrocyte sedimentation and plantar pain on heavy stroking. Surveys of school children are of great importance in finding the early macular stage and their discovery may lead to the detection of infective adults who require to be segregated. L. Rogers.
1. A good opportunity exists in Malaya for any national leprosy control. Institutional care is of the best that is available and it is felt that it has reached the saturation stage. Field work has not been established.
2. Thus leprosy has remained more of a medical problem than health.
3. Owing to the absence of any health education on leprosy, there exists an extensive gulf between the patient and the public thus creating problems of rehabilitation. The main rehabilitation performed by the government is on the employment of a few discharged patients in leprosy institutions. Though the objective of the Malayan Leprosy Relief Association is to rehabilitate, time is needed, and it may be years before the discharged patients can expect any benefits.
4. The apathy of medical officers towards serving in the Leprosaria is evidenced by the fact that since the establishment of the Leprosaria, barring 2-3 local officers, all have been outsiders on contract or otherwise. The World Health Organisation has offered a fellowship for six months and there has been no applicant from the medical officers in the Federation .
In a survey of over 1,000 patients with leprosy, 47 cases ( 4.4 per cent) were found to have glucose-6-phosphate dehydrogenase deficiency. A controlled clinical study suggests that such a deficiency does not modify the overall response to therapy but may predispose to a greater tendency to leprosy reactions. All patients were receiving 600 to 800 mgm. of sulphone per week and none had a frank haemolytic anaemia.