Trichophyton rubrum An anthropophilic fungus, which has become the most common and widely distributed dermatophyte of humans. It frequently causes chronic.

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Presentation transcript:

Trichophyton rubrum An anthropophilic fungus, which has become the most common and widely distributed dermatophyte of humans. It frequently causes chronic infections of skin, nails and rarely scalp. Granulomatous lesions may sometimes occur. Invaded hairs show ectothrix or endothrix infection but do not fluoresce under Wood's ultra-violet light. Distribution: World-wide. Key Features: Culture characteristics, microscopic morphology and failure to perforate hair in vitro. Text slide.

250. Tinea pedis caused by T. rubrum showing scaling macerated skin between the toes. Note compare slide 250 with slide 062 showing candidiasis of the interdigital space (Slides courtesy Drs G. Donald and D. Hill, Adelaide, S.A.). 250

251. Tinea pedis caused by T. rubrum showing scaling macerated skin between the toes. Note compare slide 250 with slide 062 showing candidiasis of the interdigital space (Slides courtesy Drs G. Donald and D. Hill, Adelaide, S.A.). 251

252. Atopic tinea pedis following treatment with betnovate, caused by T. rubrum. (Courtesy Dr D. Hill, Adelaide, S.A.). 252

253. Tinea of the groin (tinea cruris) caused by T. rubrum 253. Tinea of the groin (tinea cruris) caused by T. rubrum. Note circular erythematous scaly lesions with advancing border (Slides courtesy Drs D. Hill and G. Donald, Adelaide, S.A.). 253

254. Tinea of the groin (tinea cruris) caused by T. rubrum 254. Tinea of the groin (tinea cruris) caused by T. rubrum. Note circular erythematous scaly lesions with advancing border (Slides courtesy Drs D. Hill and G. Donald, Adelaide, S.A.). 254

255. Erythematous, scaly perianal lesions caused by T. rubrum 255. Erythematous, scaly perianal lesions caused by T. rubrum. (Courtesy Dr G. Hunter, Adelaide, S.A.). 255

256. T. rubrum infection of finger nails (slide 256) and toe nails (slide 257). Note nails become discoloured and brittle. 256

257. T. rubrum infection of finger nails (slide 256) and toe nails (slide 257). Note nails become discoloured and brittle. 257

258. Onychomycosis caused by T. rubrum.

259. Onychomycosis caused by T. rubrum.

260. Chronic non-inflammatory tinea of a finger (260) and hand (261), caused by T. rubrum. (Courtesy Drs G. Donald and D. Hill, Adelaide, S.A.). 260

261. Chronic non-inflammatory tinea of a finger (260) and hand (261), caused by T. rubrum. (Courtesy Drs G. Donald and D. Hill, Adelaide, S.A.). 261

262. Facial lesion caused by T 262. Facial lesion caused by T. rubrum showing distinctive, erythematous, advancing border. (Courtesy Dr G. Hunter, Adelaide, S.A.). 262

263. Tinea corporis caused by T 263. Tinea corporis caused by T. rubrum showing distinctive erythematous advancing border. (Courtesy Dr D. Hill, Adelaide, S.A.). 263

264. T. rubrum infection of the foot and calf.

265. Tinea barbae caused by T. rubrum. (Slides courtesy Drs G 265. Tinea barbae caused by T. rubrum. (Slides courtesy Drs G. Hunter and J. Nicholson, Adelaide, S.A.). 265

266. Tinea barbae caused by T. rubrum. (Slides courtesy Drs G 266. Tinea barbae caused by T. rubrum. (Slides courtesy Drs G. Hunter and J. Nicholson, Adelaide, S.A.). 266

267. T. rubrum downy type on Kaminski's Lactritmel agar (Mycopathologia 1985; 91:57-59). Cultures are generally white, suede-like to downy with a characteristic deep wine-red reverse pigment. Note no reverse pigment is produced when these strains are grown on 1% peptone agar. 267

268. T. rubrum downy type on Kaminski's Lactritmel agar (Mycopathologia 1985; 91:57-59). Cultures are generally white, suede-like to downy with a characteristic deep wine-red reverse pigment. Note no reverse pigment is produced when these strains are grown on 1% peptone agar. 268

269. Microscopic morphology of T 269. Microscopic morphology of T. rubrum showing the production of scanty to moderate numbers of slender clavate to pyriform microconidia. Macroconidia are absent, however closterospore-like projections may be present in some strains. 269

270. Microscopic morphology of T 270. Microscopic morphology of T. rubrum showing the production of scanty to moderate numbers of slender clavate to pyriform microconidia. Macroconidia are absent, however closterospore-like projections may be present in some strains. 270

271. Microscopic morphology of T 271. Microscopic morphology of T. rubrum showing closterospore-like projections which may be present in some strains. 271