Enzyme-linked immunosorbent assay of phenolic glycolipid-I in patients with Hansen's disease

Introduction: Hansen′s disease or leprosy is a contagious-infection entity produced by the Hansen bacillus or Mycobacterium leprae. The phenolic glycolipid is a special trisaccharide found in the bacillus cell wall and proved to be specific and immunogenic species during M. leprae. Objective: To determine the presence of the Hansen bacillus enzyme-linked immunoassay (ELISA) method glycolipid phenolic I in a group of patients in Dermatology Consultation at the Valle del Cauca Health Services; these patients were classified as cures or under watch according to criteria established by the World Health Organization (WHO). Methodology: From the data base of the Dermatology Consultation at the Valle del Cauca Health Services, we studied 159 patients with Hansen′s disease who were tested with the enzyme-linked immunoassay (ELISA) with the phenolic glycolipid I to cross reference information and observe if they were or were not positive to this test. A positive ELISA indicates the bacillus is still present in the patient. Results: As an important fact, we found that of 78 patients cured, when bearing in mind the monitoring period, 9 were positive for the ELISA. When this period was discarded, 81 sick individuals were classified as cured according to WHO criteria but the same 9 continued positive for ELISA. Conclusion: It may be concluded that in spite of meeting WHO criteria, these patients still show presence of the bacillus and the monitoring period is not required as a criterion to discharge a patient. We recommend adding to WHO criteria a negative ELISA, to obtain additional information that helps to certify that a patient is or is not cured. Introducción: La enfermedad de Hansen o lepra es una entidad infecto-contagiosa producida por el bacilo de Hansen o Mycobacterium leprae. El glicolípido fenólico I es un trisacárido especial que se encuentra en la pared celular del bacilo y ha demostrado ser específico de especie e inmunogénico durante la infección de M. leprae. Objetivo: Determinar la presencia del bacilo de Hansen por el método de inmunoensayo ligado a enzimas (ELISA) a glicolípido fenólico I en un grupo de pacientes del Consultorio Dermatológico del Servicio de Salud del Valle del Cauca clasificados como curados o en vigilancia, según criterios preestablecidos por la Organización Mundial de la Salud (OMS). Metodología: De la base de datos del Consultorio Dermatológico del Servicio de Salud del Valle del Cauca se estudiaron en total 159 pacientes con en