01707nas a2200289   4500000000100000008004100001260001300042653001600055653001200071653003100083653001100114653001100125653002500136653000900161653002500170653002600195100001500221700001200236700001200248700001700260245015300277300001000430490000700440050003200447520092400479022001401403       1988                            d  c1988 Jan10aAge Factors10aDapsone10aDrug Resistance, Microbial10aFemale10aHumans10aLeprosy, lepromatous10aMale10aMycobacterium leprae10aRetrospective Studies1 aAschhoff M1 aRaj P P1 aLilly L1 aSrinivasan H00aSecondary and primary dapsone resistant leprosy: an analysis of 199 patients from St. Thomas Hospital and leprosy project, Chettupattu, South India.  a34-460 v60  aInfolep Library - available3 a<p>The occurrence of secondary and primary dapsone resistance in 199 patients in our control area and the influence of certain variables such as age, initial bacteriological and morphological indices, duration of regular dapsone monotherapy, on the emergence of dapsone resistance was investigated. Ninety one of 122 patients and 29 out of 77 showed secondary (SDR) and primary (PDR) resistance to dapsone respectively. Very low BI (BI:2.5) group also showed both SDR (60%) and PDR (40%). Low or high MI group exhibited the same degree of resistance. Multiplication of M. leprae was obtained even when the MI of the inocula was zero. Even in the group who had 1 to 5 years duration of regular dapsone treatment, 85% patients showed SDR. Significance of such results are discussed in relation to chemotherapy. The overall minimum prevalence of SDR was found to be 5.6% and 21% in the case of PDR in our control area.</p>  a0254-9395