Chronically recurrent and widespread tinea corporis due to Trichophyton rubrum in an immunocompetent patient.

A 31-year-old immunocompetent male who presented with a 4-year history of extensive erythematous and scaly plaques involving the abdomen, gluteal and inguen regions with concomitant tinea pedis and onychomycosis is described. Diagnosis was based on positive mycological examination and positive histopathologic examination. Species identification was performed by growth on Sabouraud dextrose agar and by sequencing of the internal transcribed spacer regions of the rDNA region. The pathogen identified was Trichophyton rubrum. The same fungal species was cultured from his abdominal, gluteal, foot and toenail. A combination therapy with systemic terbinafine and topically applied terbinafine cream was successful. A 1-year follow-up did not show any recurrence of infection.

Successful Treatment of Refractory Majocchi's Granuloma with Voriconazole and Review of Published Literature.

Majocchi's granuloma (MG) is a rare deep skin dermatophyte infection that can occur either in immunocompetent or in immunocompromised individuals. Oral itraconazole or terbinafine is considered to be the first choice of treatment. We report an immunocompetent man with deep nodular form of MG, the form which is generally found in immunosuppressed individuals. Previous treatment with either oral itraconazole or terbinafine yielded no apparent improvement. After a series of examination, the man was diagnosed as having Trichophyton rubrum-induced MG mixed with bacterial infection as evidenced by growth of Klebsiella pneumoniae in tissue bacterial culture. The patient was treated with a combination of cefoselis and levofloxacin for bacterial clearance followed by voriconazole treatment. After approximately 4 months of voriconazole treatment, the lesions completely resolved. Alternative medicine (voriconazole) can be considered in case of refractory infections during MG treatment.

Agminated spitz nevi: case report and review of the literature.

Spitz nevi are benign melanocytic lesions with many histologic similarities to malignant melanoma. A case of agminated Spitz nevi on a 2-year-old boy's left cheek is reported and 41 other cases of agminated Spitz nevi are reviewed. In this case, two biopsies were performed on two different-appearing lesions and the results of both biopsies showed Spitz nevi.

Isolated skull cryptococcosis in an immunocompetent patient.

A 62-year-old immunocompetent rural woman who represents an isolated cryptococcal skull infection without systematic involvement is described. Diagnosis was based on positive India ink staining, positive histopathologic examination, and positive culture. Species identification was performed by growth on Sabouraud dextrose agar and CHROMagar medium and by sequencing of the intergenic and internal transcribed spacer regions of the rRNA genes. This case describes a rare presentation of Cryptococcus neoformans infection in a human immunodeficiency virus-negative patient. The lesions were significantly improved with treatment of daily oral itraconazole 400 mg. A maintenance therapy with a low-dose itraconazole was prescribed to warrant a clinical and mycological eradication. A two-year follow-up did not show any recurrence of infection.

A rare complication of ear piercing: a case of subcutaneous phaeohyphomycosis caused by Veronaea botryosa in China.

We present the third case of phaeohyphomycosis caused by Veronaea botryosa in China and the tenth case worldwide. A 16-year-old Chinese girl developed crusted, verrucous lesions, initially on the left ear and later on the left buttock, within 2-5 months of receiving an ear piercing. Histopathological examination of biopsy specimens confirmed diagnosis of subcutaneous phaeohyphomycosis. Microscopic examination of the colonies recovered in culture from a portion of the biopsy specimen resulted in the identification of Veronaea botryosa based primarily on the presence of two-celled, brownish pigmented, cylindrical conidia produced sympodially from erect conidiogenous cells. The lesions significantly improved with daily oral treatment with itraconazole 400 mg and adjuvant thermotherapy for 6 months. A maintenance therapy with low dose itraconazole was prescribed in order to achieve clinical and mycological cure. A two-year follow-up didn't reveal any recurrence of infection. Our case is the first report of V. botryosa infection associated with a cosmetic procedure, which suggests that skin piercing could precipitate V. botryosa or other dematiaceous, as well as opportunistic fungal infections.

Successful treatment of pulmonary mucormycosis caused by Rhizopus microsporus with posaconazole.

BACKGROUND: Mucormycosis is a rare fungal infection occurring chiefly in the lung or the rhino-orbital-cerebral compartment, particularly in patients with immunodeficiency or diabetes mellitus. Among Mucorales fungi, Rhizopus spp. are the most common cause of mucormycosis. CASE PRESENTATION: We report a case of pulmonary mucormycosis caused by Rhizopus microsporus in a young patient with diabetes but no other apparent risk factors. The diagnosis mainly relied on clinical manifestation, positive pulmonary tissue biopsy, and fungal culture. The patient was successfully treated with posaconazole oral suspension and remains asymptomatic at one-year follow-up. CONCLUSIONS: Pulmonary mucormycosis is a life-threatening condition and posaconazole is an effective treatment for pulmonary mucormycosis caused by Rhizopus microspores.

Oxygen sensitivity of the nifLA promoter of Klebsiella pneumoniae.

Oxygen sensitivity of the nifLA promoter of Klebsiella pneumoniae has been demonstrated. Studies on the oxygen regulation of nifB-lacZ and nifH-lacZ fusions in the presence of the nifLA operon, which contains either an intact or a deleted nifL gene, indicate that possibly both the nifL promoter and the nifL product are responsible for nif repression by oxygen.

Effect of nifA gene product on expression of lacZ under nifH promoter in Escherichia coli.

Gene expression of the nitrogen fixation system from Klebsiello pneumonice was studied in Escherichia coli by using compatible plasmids as vectors. One constructed plasmid carried the nifH promoter fused to the structural gene for beta-galactosidase, lac Z. Another plasmid carried the promoter of a tetracycline-resistance gene fused to nifA. We found that anaerobic synthesis of beta-galactosidase was greatly enhanced by the presence of an active nifA gene, indicating that its product is a positive control factor for transcription of nifH. In addition, anaerobic expression of lacZ was repressed by ammonium or serine in the presence of nifA. Thus the regulatory mechanism under study is of physiological relevance.

rpt-1, an intracellular protein from helper/inducer T cells that regulates gene expression of interleukin 2 receptor and human immunodeficiency virus type 1.

The Rpt-1 (for regulatory protein, T-lymphocyte, 1) gene, selectively expressed by resting but not by activated CD4+ inducer T cells, encodes an intracellular protein (rpt-1, Mr 41,000) that down-regulates gene expression directed by the promoter region of the gene encoding interleukin 2 receptor alpha chain and by the long terminal repeat of human immunodeficiency virus type 1. The data reported here suggest that rpt-1 levels may be inversely correlated with activation of CD4+ T cells and human immunodeficiency virus replication leading to clinical symptoms of the acquired immunodeficiency syndrome.