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Measuring leprosy stigma--a preliminary review of the leprosy literature.

A literature review was conducted to review work done to date on measuring stigma related to leprosy. References were obtained through a PubMed (Medline) search and through examining relevant bibliographies. Twelve papers were selected that addressed the issue of measurement of stigma and that contained a sample of the instrument used. Three unpublished studies were also included in the review. Studies that attempt to measure stigma can be broadly categorized in two groups, a) studies that assess the effects of stigma on the person affected, and b) surveys that assess community attitudes and/or practices. The study and questionnaire characteristics of the studies in both categories are described and compared. The studies reviewed indicate that leprosy stigma is still a global phenomenon, occurring in both endemic and non-endemic countries. The consequences of stigma affect individuals as well as the effectiveness of leprosy control activities. Despite enormous cultural diversity, the areas of life affected are remarkably similar. They included mobility, interpersonal relationships, marriage, employment, leisure activities, and attendance at social and religious functions. This suggests that development of a standard stigma scale for leprosy may be possible. Data obtained with such an instrument would useful in situational analysis, advocacy work, monitoring and evaluation of interventions against stigma, and research to better understand stigma and its determinants.

Cross-Sectional Studies↗

Infection by Mycobacterium leprae of household contacts of lepromatous leprosy patients from a post-elimination leprosy region of Colombia.

The Leprosy Control Program of Antioquia, (post-elimination leprosy state of Colombia), had registered by 1999, 56 lepromatous leprosy patients and their household contacts (HHC). Our interest was to detect Mycobacterium leprae infection in these HHC. Clinical examination, acid-fast bacillary staining (AFB) in nasal secretions, and slit skin samples, IgM anti-PGL-I in serum and Lepromine A (Mitsuda) reactivity were tested. Two hundred forty eight HHC were studied, 49% were male. After clinical examination, two HHC were diagnosed as multi bacillary patients; 13% showed positive IgM anti-PGL-I titers; Mitsuda reaction (> or = 4 mm) was positive in 59%; AFB was negative in all samples, except in the two new patients. HHC were classified according to test results. Group 1: two new multi bacillary patients. Group 2: 15 HHC seropositive, Mitsuda-negative. Group 3: 13 HHC seropositive, Mitsuda-positive. Group 4: 130 HHC seronegative, Mitsuda-positive. Group 5: 88 HHC seronegative, Mitsuda-negative. These results are an indication that the transmission of the infection is still happening in a region considered in the post elimination phase. The two new patients represent an infection source for others contacts, and groups 2 and 3 are infected HHC that could develop the disease in future. Follow up of high risk population is necessary to achieve real elimination of leprosy.

Adolescent↗

[Social reproduction of leprosy: a study of patients profile with leprosy in the city of São Paulo].

This study discusses the relationship between work and living conditions among leprosy patients enrolled in the São Paulo municipal public health system in 1996. Social patterns were studied based on the theory of social determination of the health-disease process. The main purpose of the study was to emphasize evidence of the disease determination network, seeking new knowledge to improve public policies on leprosy. Data were gathered from a sample of leprosy patients registered in the city's public health system. Although patients' families are characterized by a common social thread, different work/life possibilities allow for a classification of patients into three social groups. The majority belong to groups that are marginalized from social production, living in areas where social exclusion is more extreme, on the outskirts of the city. If the trends in this study persist, incident leprosy cases will result from the social exclusion of migrants from Brazil's Southeast and Northeast. The study also discusses the position of young people and female patients in the determination network of this infectious disease in the city of São Paulo.

Adolescent↗

T lymphocyte reactivity of leprosy patients and healthy contacts from a leprosy-endemic population to delipidified cell components of Mycobacterium leprae.

In this study, we measured in vitro proliferative responses of peripheral blood mononuclear cells from both leprosy patients across the clinical spectrum and also healthy contacts from a leprosy-endemic population to delipidified cell components of Mycobacterium leprae (DCC) and Dharmendra lepromin. Dharmendra lepromin was poor in inducing in vitro T cell proliferation in all the study groups, even though it elicited marked in vivo skin test reaction in tuberculoid leprosy patients and healthy contacts. In contrast, Dharmendra preparation of BCG induced marked T-cell response in tuberculoid as well as bacterial index negative lepromatous patients. DCC induced a significantly higher lymphoproliferative response than Dharmendra lepromin in all study groups. A significant positive correlation was observed between the lymphoproliferative responses to DCC and BCG. The present study, based on a large number of leprosy patients and healthy contacts, clearly demonstrates that DCC, depleted of glycolipids and lipopolysaccharides, is a good antigenic preparation for evaluating T-cell reactivity to M. leprae.

Adolescent↗

The extent of leprosy-related disabilities in Istanbul Leprosy Hospital, Turkey.

This study was carried out between January and December 1992 at the Istanbul Leprosy Hospital. Seven hundred and eleven leprosy patients were evaluated according to their age, gender and type of disease and disability according to the WHO disability grading system (1980). There were 527 males (74.2%) and 184 females (25.8%) in the group. The average age was 50.0 +/- 13.5 years and the average duration of disease was 25.9 +/- 13.2 years. Six hundred and seventy-eight patients (95.4%) were in borderline (BL) and lepromatous (LL) leprosy. The extent of disabilities was very high in 711 leprosy patients. It was found that 539 of the patients (75.8%) had eye disabilities, 511 of them (71.8%) had hand disabilities, 521 of them (73.3%) had foot disabilities. The most frequent eye, hand and foot disabilities were a decrease of vision (52.7), acute or chronic iridocyclitis (48.8%), slightly-marked corneal sensory loss (43.2%), mobile claw hand (33.3%), palmar insensitivity (16.3%), plantar ulcer (37.2%) and plantar insensitivity (19.8%). Eye deformities were the most common of the three affected areas in this study.

Female↗

Experiencing leprosy: perceiving and coping with leprosy and its treatment. A qualitative study conducted in Nepal.

The way people interpret their disease and its treatment, or the meanings of these, has an impact on the way they deal with their disease and its treatment; meanings shape actions. In this article, the influence of the patients' interpretations on their coping with leprosy and its treatment, their help seeking and adherence behaviour is explored. This article describes the findings of a qualitative study, in which 29 people who discontinued treatment and 47 people who were released from treatment were interviewed in depth. All were registered at general health posts. Exploring the meanings of leprosy and its treatment in patients in Nepal resulted in the identification of six different categories of meanings. Each of these influenced the way people coped with leprosy and its treatment, their help seeking and adherence behaviour. These different categories are discussed. The main conclusion is that the explanatory models of the interviewees and of the health worker are different and that if we want to improve our leprosy services more health education has to be given whilst at the same time listening more carefully to those affected by this disease. This will give us greater insight into the way people understand their disease and its treatment and the measures we can take to prevent discontinuation of treatment.

Adaptation, Physiological↗

Multidrug therapy in multibacillary leprosy; experience in an urban leprosy center.

The article records the experience of treating multibacillary (BB, BL and LL) leprosy with multidrug therapy (MDT) in an urban leprosy center. The problem of leprosy is to be properly assessed throughout the Indian subcontinent because most of the epidemiological data from the areas labeled low-endemic have to be updated. The regularity of therapy must be ensured and monitored constantly, but in spite of our efforts to do so some factors were beyond our control, such as providing a means of livelihood for the migrants from other places. In addition, the intake of drugs also has to be periodically checked from the history and discoloration of skin and, most importantly, confirmed by performing random spot tests for dapsone in the urine. The main problems discussed are the difficulty in demonstrating acid-fast bacilli in slit-skin smears from the macular form of borderline leprosy (also called dimorphous macular) and, secondly, whether the duration of multibacillary therapy was adequate since only approximately 50% of our patients achieved smear negativity after taking MDT for the stipulated period of 24 months. Experiences from other centers have suggested that the duration of MDT should be prolonged in multibacillary patients to achieve smear-negative status. Yet another group notes that smear negativity is gradually achieved during the period of surveillance following stoppage of MDT after 24 months. These questions await more information from good centers with controlled field studies.

Dapsone↗

Leprosy and malignancy: autopsy findings of 252 leprosy patients.

The occurrence of malignant tumors in leprosy patients was studied in 252 autopsied cases. Malignant tumors were found in 33 out of 110 autopsy cases from 1962 to 1971, and in 51 out of 141 autopsy cases from 1977 to 1989 (until July). In 1974, a lepromatous case with Kaposi's sarcoma was autopsied. The incidence of malignant tumors in our 252 cases were 33.7% (85 out of 252). Carcinoma of the alimentary system was most common: stomach, liver and large intestine, in that order. There was an increased number of hepatocellular carcinoma closely related to liver cirrhosis. Carcinoma of the lung has increased remarkably in leprosy patients quite recently. Malignant lymphoma was the most common of the nonepithelial malignant tumors, and four of these cases were seen in lepromatous leprosy patients. Eight cases showed double or triple cancers; seven of these were autopsied during 1977 to 1989. Further studies should be done to ascertain which types of leprosy showed the highest incidence, and which sex showed more frequent malignant tumors.

Aged↗

Correlation between occurrence of leprosy and fossil fuels: role of fossil fuel bacteria in the origin and global epidemiology of leprosy.

On the basis of correlative data on the global distribution of leprosy, its bacteria metabolizing fossil fuels (FF), and the FF themselves, the origin of leprosy in the world as a whole, and in the leprosy-free countries, in particular, as indigenous cases, appeared to be primarily due to a soil-to-man, and secondarily due to a man-to-man infection. These findings helped to elucidate similar problems of animal leprosies and nocardial diseases.

Animals↗

Acid mucopolysaccharide metabolism in leprosy. 1. Storage of hyaluronic acid and its possible significance in the pathogenesis of leprosy.

A histochemical analysis of 102 skin biopsies from a variety of leprosy types revealed the persistent presence of hyaluronic acid in lepra cells of lepromas. In contrast, the hyaluronic acid content of tuberculoid epithelioid cells showed a minimum amount of hyaluronic acid and hyaluronic acid tended to disappear from these granulomas as they aged. The macrophages of dimorphous leprosy occupied an intermediate position with respect to hyaluronic acid content and distribution, resembling the tuberculoid in BT cases and the lepromatous expression in BL cases. It is suggested that hyaluronic acid, in a manner similar to M. leprae and lipid, has a quantitatively varied distribution reflecting the immunopathologic spectrum of leprosy. This finding suggests that acid mucopolysaccharide may be significantly involved in that host/parasite interaction in leprosy.

Adolescent↗

Prevalence of leprosy in children of leprosy parents.

A cross sectional clinical study was done in slums and adjoining village of Raipur town. All the children in 100 families, in which at least one patient of proved leprosy was present were examined. Children of 100 non-leprosy families served as control. In leprous families prevalence was 14.2 times higher in comparison to children in control group. Also prevalence was higher in children of those families in which number of patients were more than one, or there was lepromatous leprosy. In children the common type of lesion were tuberculoid, indeterminate, borderline and pure neural type in that order, while no case of lepromatous leprosy was seen.

Adult↗

Minerals in blood sera and scalp hair in patients with lepromatous leprosy and tuberculoid leprosy.

Scalp hair and blood sera of three groups of individuals were studied for mineral contents by flame photometric and colorimetric procedures. Patients in one of the three groups were suffering from lepromatous leprosy, the second group comprised patients with tuberculoid leprosy and the third group consisted of normal controls. The results obtained revealed changes in the mineral content of the scalp hair of those suffering from lepromatous leprosy and tuberculoid leprosy. A possible relationship may exist between hair and serum minerals.

Adult↗

The approach to the leprosy problem in the past in Indonesia. A historical review of leprosy control activities in Indonesia during the last centuries.

Due to the severe disabilities leprosy has always been a disease which appealed to the imagination. In bygone centuries cause and treatment were unknown and the fear to be infected was enormous. In Indonesia medical officers struggled with the problem. As early as the 17th century the disease was described in detail by Ten Rhijne. In the 19th century leprosy was considered hereditary. After the discovery of the leprosy bacillus by Hansen in 1873, confusion continued as the bacillus could not be cultivated. Many therapies were tried, but with no result. At first patients were isolated in leprosaria, later on a more humane system of house-isolation was introduced. Since 1932 Indonesian medical officers have played a prominent part in research and the determination of the future approach to the problem. Seen against the background of our present knowledge about the disease, it is interesting to follow the struggle against leprosy in the past.

History, 17th Century↗

Microscopic leprosy skin lesions in primary neuritic leprosy.

The histologic diagnosis of primary neuritic leprosy (PNL) remains a public health care concern, especially when nerve biopsies cannot be performed. As such, some authors emphasize the importance of performing a skin biopsy of a hypoesthetic area even without clinically visible lesions. In this study, an attempt was made to define the histologic changes in the sensory altered skin of 42 clinically diagnosed PNL patients. Histologic alterations caused by leprosy were seen in 31% of these patients: 6 were classified as borderline tuberculoid and 7 as indeterminate. In addition, 33% showed mild, non-specific, mononuclear cell infiltrates around the blood vessels within the papillary and reticular dermis that probably reflected an early inflammatory reaction to Mycobacterium leprae infection. Only 36% of those biopsied had no significant lesions. Our results suggested that, while not all PNL patients are similar, histologic skin examination can contribute to early leprosy detection and commencement of adequate treatment.

Adolescent↗

Light and electron microscopic study of peripheral nerve damage in patients with lepromatous leprosy (LL) and borderline lepromatous leprosy (BL).

Cutaneous branches of radial nerves in patients with lepromatous leprosy (LL) and borderline lepromatous (BL) were studied by light and electron microscopy. Foamy macrophages were found more or less in the nerve fibers of all leprosy patients and distributed in the epineurial, perineurial and endoneurial areas. In the endoneurium, the foamy macrophages were mainly located in the subperineurial and perivascular spaces. Vacuolated Schwann cells were also found in the nerve fasciculus. In electron microscopy, these foamy macrophages and vacuolated Schwann cells contained numerous small dense materials, irregular in size and shape, considered to be degenerated and fragmented mycobacterium leprae. These dense materials were found also in the cytoplasm of vascular endothelial cells. These findings suggest that mycobacteria enter into the endoneurium via the blood vessels. In our present study, on the other hand, it was very difficult to find the intact mycobacteria in the cytoplasm of the foamy macrophages, Schwann cells or endothelial cells, as well as in the Ziehl-Neelsen staining of paraffin sections. The disappearance of intact bacilli in our present study might have been caused by multi drug therapy. The myelinated nerve fibers were degenerated and disappeared in variable degrees. Degenerative changes of the myelin sheath developed from the outer layer to the inner layer with disarrangement of the lamellar structure. These findings were different from myelin destruction of peripheral nerves in Wallerian degeneration. The degenerative changes of the myelin sheath are caused by degeneration and destruction of Schwann cells in leprosy patients. Fibrosis surrounding myelinated and unmyelinated nerve fibers, i.e., periaxonal fibrosis, was found to a greater or lesser extent in the endoneurium. In the present study, it is still unclear whether the periaxonal fibrosis was due to necrosis of the Schwann cells by infection of mycobacteria or to an autoimmune mechanism such as antiperipheral nerve antibody. However, lamellated concentric fibrosis surrounding regenerative myelinated and unmyelinated nerve fibers with the disappearance of mycobacteria suggests that degenerations and regenerations of nerve axons were repeated during clinical cause. These findings indicated that autoimmune mechanisms play an important role in the pathogenesis of periaxonal fibrosis.

Adolescent↗

Development of a whole blood assay to measure T cell responses to leprosy: a new tool for immuno-epidemiological field studies of leprosy immunity.

A whole blood assay is described to measure T cell mediated immune responses to leprosy and provide an alternative to the conventional lymphocyte transformation test. Optimal conditions were defined for the whole blood assay, and interferon-gamma measurement was found to be a more sensitive way of measuring responses than tritiated thymidine incorporation. The assay was shown to be useful for investigating responses to a range of leprosy antigens. A whole blood assay has the advantages of being quick, simple and requiring only a small volume of blood, making it more appropriate as an immuno-epidemiological field test in leprosy endemic areas.

Antigens, Bacterial↗

Leprosy in Malawi. 1. Sensitivity and specificity of the diagnosis and the search for risk factors for leprosy.

The sensitivity and specificity of the diagnosis of leprosy in the context of a total population survey are examined. It is apparent that diagnostic tools are unsatisfactory with regard to reaching a highly sensitive and specific case definition of paucibacillary leprosy, particularly in actively found suspects. Histopathological examination of 4 mm punch biopsy specimens contributed appreciably to both the sensitivity and specificity of the diagnosis of leprosy, though there was evidence for false positive and false negative histopathology results. The needs for high sensitivity during the intake phase of a vaccine trial and for high specificity during follow-up surveys for risk factors are discussed.

Adolescent↗

Leprosy in Malawi. 2. Background, design and prospects of the Karonga Prevention Trial, a leprosy vaccine trial in northern Malawi.

The Karonga Prevention Trial is the largest vaccine trial ever mounted in Africa. It is designed to test two hypotheses: (i) whether the addition of killed Mycobacterium leprae can increase the protection against leprosy (and tuberculosis) imparted by BCG alone; and (ii) whether repeating a BCG vaccination can increase upon the protection provided by an initial dose. The rationale and design of the trial are discussed in relation to the history of vaccination against leprosy and to several contending arguments which determined the ultimate protocol. The potential of the trial to reveal statistically significant differences between the vaccines being compared is discussed, as are the implications of possible results for future research and control of leprosy.

Adolescent↗