title: Microscopic observation of progressive immobilization of leishmania promastigotes in acridine orange stain.
abstract: To rapidly isolate Leishmania donovani promastigotes in samples from Novy-MacNeal-Nicolle (NNN) cultures, a method of staining with acridine orange was developed. Such vital staining combines the advantages of direct microscopic examination (e.g., observation of motility) with more accurate cytological and structural imaging of the stained parasites (usually obtained by Giemsa staining). Progressive immobilization of Leishmania promastigotes associated with a change in fluorescence color was also studied. Our findings may be useful for the early confirmation of a positive culture inoculated with a clinical sample.
authors.affiliation: Department of Microbiological, Neurological, and Orthopedic Sciences, University of Reggio Calabria, Catanzaro, Italy.
authors.forename: G S
authors.initials: GS
authors.lastname: Barreca
authors.forename: M C
authors.initials: MC
authors.lastname: Berlinghieri
authors.forename: F
authors.initials: F
authors.lastname: Foti
authors.forename: G
authors.initials: G
authors.lastname: Matera
authors.forename: A
authors.initials: A
authors.lastname: Foca
mesh_terms: D000165:Acridine Orange; D000818:Animals; D005456:Fluorescent Dyes; D006801:Humans; D007891:Leishmania / Q000302:isolation & purification*; D007896:Leishmaniasis / Q000469:parasitology*; D010274:Parasitology / Q000379:methods*; D013194:Staining and Labeling
chemical_list: D005456:Fluorescent Dyes; D000165:Acridine Orange