“Black Dot” Ringworm Due to Trichophyton tonsurans

治邦, 占部; 正子, 川野

doi:10.2336/nishinihonhifu.37.15

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…Urabe also reported another case of tinea pedisprobably due to this fungus (7). Five of these six cases were female (2)(3)(4)(5)(6); in the last case, the age and sex were not reported (7). Three of the five cases were adults.…”

Section: Discussionmentioning

confidence: 97%

AN ADULT CASE OF KERION CELSI DUE TO TRICHOPHYTON TONSURANS

Yamasaki

Toda

Ikutomi

et al. 1982

The Journal of Dermatology

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Section: Discussionmentioning

confidence: 97%

AN ADULT CASE OF KERION CELSI DUE TO TRICHOPHYTON TONSURANS

Yamasaki

Toda

Ikutomi

et al. 1982

The Journal of Dermatology

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“…. It was believed that BDR was rare in Japan, because the major causative fungus of tinea capitis was Microsporum ferrugineum, which produces ectothrix invasion of the hair and does not cause BDR (5). Sasagawa (6) reviewed the reported cases of BDR through 1980.…”

Section: Chsimentioning

confidence: 99%

A Case of Black Dot Ringworm with a Review of Japanese Cases

Ooka

Kashima

Kubota

et al. 2000

The Journal of Dermatology

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Black dot ringworm (BDR), caused by Trichophyton violaceum var. glabrum (T. glabrum), was observed in a 28-year-old Japanese female who had been treated with prednisolone (22.5 mg/day) for systemic lupus erythematosus. It was successfully treated with oral terbinafine (125 mg/day) for 12 weeks. The causative fungus was identified by molecular analysis as well as morphological and biochemical examination. The chitin synthase 1 (CHS1) gene cleavage pattern of the clinical isolate with restricted enzyme HinfI was identical to that of T. violaceum. We reviewed previous reports of BDR to determine the historical trend of this infection in Japan. Since 1974, 93 Japanese cases have been reported. The age distribution was bi-modal: the higher peak consisted of children (aged 0-15 years), and the lower peak was composed of the elderly (aged 60-75 years). In the elderly group, females were predominant (M:F=1:22, p<0.001). T. violaceum, including T. glabrum, was identified as the most common causative fungus of BDR (75.3%). Sixty percent of cases showed slight erythema. In 8 families, 16 cases were found to be intrafamilial infections. A history of previous steroid treatment was described in about 40%.

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“…Since 2001, a nationwide epidemic of T. tonsurans infection has been documented among sportsmen and women participating in wrestling, judo, and sumo wrestling in Japan (1)(2)(3). Before the epidemic, T. tonsurans had been reported to be responsible for several sporadic and familial cases of tinea capitis in Japan (4)(5)(6)(7). In a previous molecular epidemiological study using restriction fragment length polymorphism (RFLP) analysis of the non-transcribed spacer region (NTS) of ribosomal RNA gene with the restriction enzymes MvaI and AvaI (8), we distinguished 6 molecular types among Japanese isolates: NTS I, II, III, IV, V, and VI.…”

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confidence: 99%

Epidemiology of Sporadic (Non-Epidemic) Cases of <i>Trichophyton tonsurans</i> Infection in Japan Based on PCR-RFLP Analysis of Non-Transcribed Spacer Region of Ribosomal RNA Gene

et al. 2008

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A number of cases of Trichophyton tonsurans infection have been reported among sportsmen and women participating in wrestling, judo, and sumo wrestling in Japan, but there have also been sporadic reports of cases with no history of contact with these sports. A molecular method using restriction enzyme analysis of PCR-amplified fragments targeting the non-transcribed spacer region (NTS) of ribosomal RNA gene in fungal nuclei was applied to T. tonsurans strains isolated from sporadic cases in Japan. Five of 6 molecular types recorded in Japan, i.e., NTS types I, II, IV, V, and VI, and two new types, designated NTS VII and NTS VIII, were observed among 10 strains isolated from sporadic cases. The NTS IV strains, considered not to be related to the present epidemic, were found to be the most prevalent molecular type accounting for 4 of the 10 strains isolated. NTS I was the most prevalent type in the current epidemic in Japan, but it was cultured from only one patient who was later noted to be the daughter of a retired judo practitioner. Four subjects had histories of living abroad and were considered to have been infected outside Japan. The strains in these cases were NTS II, V, VI, and VII. The results of this study suggested that the NTS IV strains were originally present in Japan at a low incidence, but that there has been a recent influx of NTS I, II, V, VI, and VII from abroad, which has been accompanied by the secondary spread of strains from wrestlers and practitioners of martial arts to the general community.

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“Black Dot” Ringworm Due to Trichophyton tonsurans

Cited by 9 publications

References 3 publications

AN ADULT CASE OF KERION CELSI DUE TO TRICHOPHYTON TONSURANS

AN ADULT CASE OF KERION CELSI DUE TO TRICHOPHYTON TONSURANS

A Case of Black Dot Ringworm with a Review of Japanese Cases

Epidemiology of Sporadic (Non-Epidemic) Cases of <i>Trichophyton tonsurans</i> Infection in Japan Based on PCR-RFLP Analysis of Non-Transcribed Spacer Region of Ribosomal RNA Gene

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