@article{17605, keywords = {Animals, Biopsy, Ethidium, Fluorescent Dyes, Foot, Humans, leprosy, Mice, Mice, Inbred BALB C, Mycobacterium leprae, Skin}, author = {Katoch V M}, title = {Comparative assessment of viability of M.leprae by mouse foot-pad and fluorescent staining techniques.}, abstract = {

Morphological characteristics have been used as a parameter to assess the viability of M.leprae in leprosy patients. However, with the advent of the mouse foot-pad technique, viability of M.leprae is determined by growing the bacilli in the mouse foot-pad. In recent years, a fluorescent staining technique using fluorescent diacetate-ethidium bromide (FDA-EB) has been used to assess the viability of cultivable mycobacteria as well as M.leprae. The purpose of this study was to compare the viability of M.leprae by both mouse foot-pad and fluorescent staining techniques. M.leprae strains from both untreated and treated patients as well as mouse passaged strains of M.leprae were used for the comparison. Percentage of green-stained bacilli in the inoculum was compared with that of multiplication of M.leprae in the mouse foot-pad. It was observed that there was no correlation between the estimates of viable M.leprae by fluorescent staining and by mouse foot-pad inoculation. FDA-EB staining appears to reflect only trends as absence of green staining cells had overall general correlation with loss of infectivity to mouse foot-pad but, the converse was not found to be true.

}, year = {1994}, journal = {Indian journal of leprosy}, volume = {66}, pages = {455-62}, month = {1994 Oct-Dec}, issn = {0254-9395}, language = {eng}, }