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[An outbreak of Pseudomonas folliculitis in children--the first report on Pseudomonas folliculitis in Japan].

An outbreak of Pseudomonas aeruginosa folliculitis in 6 children occurred within 5 days after playing in a tiny vinyl pool. The follicular macular or pustular eruptions were mainly distributed on the trunk. No associated symptoms were seen. The causative Pseudomonas aeruginosa strain isolated from pustules of one case belonged to serogroup E, corresponding to O-11 (Difco). The rash subsided promptly and spontaneously. Furthermore, we have encountered another case of Psedomonas folliculitis caused by P. aeruginosa serogroup G, corresponding to O-6 (Difco). The maculopustular rash was distributed on the trunk and disappeared spontaneously as the cases mentioned above. The folliculitis of this baby were probably associated with the repeated use of family bath without changing water. In U.S. and Europe Pseudomonas folliculitis have been reported very frequently, but our cases were reported for the first time in Japan.

Child

Eosinophilic pustular folliculitis: fungal folliculitis?

Eosinophilic pustular folliculitis is a rare condition with no known cause. However, a fungal cause is suggested by (1) tinea-like annular lesions, (2) initial clinical consideration of fungal folliculitis in many reported cases, (3) an association with the acquired immunodeficiency syndrome, and (4) an association with scaly and vesiculopustular lesions of palms and soles. We report a case histologically identical to eosinophilic pustular folliculitis but in which hyphal fungal organisms were demonstrated in one of the involved hair follicles.

Adult

Follicule to follicule heterogeneity of sebum excretion.

We have evaluated the normal variations in the sebum excretion rate from follicle to follicle on the forehead by using the noninvasive techniques of the Lipometre and Sebutape. For a given overall amount of sebum excreted to the surface of the skin during a limited period of time, both the number of active sebaceous follicles and the amount of lipids excreted by them may vary. Significant intraindividual and interindividual differences may be found for these parameters. Such a noninvasive approach to the biology of sebaceous glands represents a new tool allowing a precise evaluation of diseases of the sebum excretion and of their treatments.

Adolescent

Human immunodeficiency virus-associated eosinophilic folliculitis. A unique dermatosis associated with advanced human immunodeficiency virus infection.

We studied 13 patients with human immunodeficiency virus (HIV) infection and a chronic pruritic folliculitis that was unresponsive to systemic treatment with bactericidal anti-staphylococcal antibiotics. The skin eruption was characterized by multiple urticarial follicular papules scattered on the trunk (100%), the head and neck (85%), and the proximal aspect of the extremities (62%). Absolute peripheral eosinophil counts were increased in six of 13 patients; a relative peripheral eosinophilia was present in 10 of 13 patients. Serum IgE levels were elevated in all seven patients tested (range, 88 to 9050 IU). Histopathologic features included a folliculitis with eosinophils. Pathogenic bacteria were not consistently found by routine bacterial skin cultures, cultures of skin biopsy specimens, or histopathologic evaluation. CD4 counts were decreased in all of the 12 patients tested (less than 300 cells per cubic millimeter) and were below 250 cells per cubic millimeter in 10 patients. A clinical response was noted to astemizole, to ultraviolet light in the B range, and to topical clobetasol propionate. These observations demonstrate that HIV-associated eosinophilic folliculitis is a unique HIV-related cutaneous disorder that is characterized by a culture-negative, chronic, pruritic folliculitis and a characteristic histopathologic picture. Of special importance, because it is associated with CD4 counts of less than 250 to 300 cells per cubic millimeter, eosinophilic folliculitis appears to be an important clinical marker of HIV infection and, particularly, of patients at increased risk of developing opportunistic infections. We suggest that the term eosinophilic pustular folliculitis (Ofuji's disease), previously used to describe this dermatosis in HIV-infected patients, should be discarded.

Acquired Immunodeficiency Syndrome

[Perforating folliculitis].

We report the case of a 20-year old male patient without significant familial or personal history who presented with a disseminated papular eruption on the abdomen, flanks and buttocks. The eruption was continual and proceeded by outbreaks, but it was not influenced by seasons. Physical examination of the skin, mucosae and skin appendages was otherwise normal. Histological examination showed all the criteria of perforating folliculitis as described by Mehregan and Coskey. On the basis of our case we would put perforating folliculitis back among the perforating dermatoses. The concept of this curious phenomenon is briefly reviewed; perforating folliculitis is part of the third group of the so-called primary forms. The clinical features are suggestive of the disease, with its small pigmented papules centred around a keratotic plug, forming a permanent disseminated eruption. Histology shows a granuloma facing a lateral perforation of the hair follicle, a pseudo-epitheliomatous epithelial hyperplasia and the presence of hair and keratin debris in the perforation. Various keratolytic treatments have been applied without success; retinoids have not been tried. The main diagnostic and nosological problem is Kyrle's disease. In view of clinical and histological data, many authors regard Kyrle's disease as a major form of perforating folliculitis. Pruritus, ascribed to an underlying illness in Kyrle's disease, is thought to increase the importance of the lesions. The specificity of perforating folliculitis is discussed, but it seems that side by side with secondary forms occurring in recognized diseases, there may be primary forms of perforating folliculitis. Dyskeratosis might be a cause of the perforation.

Adult

Experimental folliculitis with Pityrosporum orbiculare: the influence of host response.

The aetiology of the folliculitis associated with seborrhoeic eczema is unclear, though the yeast, Pityrosporum orbiculare has been implicated. P. orbiculare was applied under occlusion to normal forearm skin of patients with seborrhoeic eczema (SE), seborrhoeic eczema and folliculitis (SEF), and normal controls. There were significant differences in response to occlusion between the three groups. Those patients with previous clinical evidence of folliculitis (SEF) developed folliculitis at the site of occlusion more frequently than either of the other two groups (p less than 0.001), in whom only one patient developed skin changes. This difference was not explained by the response to occlusion alone, nor by natural carriage of yeasts. These results suggest that the yeast P. orbiculare is necessary for the development of folliculitis, but that the nature of the host response determines those patients prone to follicular inflammation.

Dermatitis, Seborrheic

Skin surface electron microscopy in Pityrosporum folliculitis. The role of follicular occlusion in disease and the response to oral ketoconazole.

The yeast Pityrosporum orbiculare is thought to cause the folliculitis associated with seborrheic eczema. However, a combination of mechanical and microbiological factors may be involved, with follicular occlusion leading to yeast overgrowth and folliculitis. Scanning electron microscopy was used to investigate this hypothesis. Skin biopsy specimens obtained from patients with Pityrosporum folliculitis were examined by scanning electron microscopy before and after oral ketoconazole therapy. Patients with active disease showed occlusion of noninflamed follicles, which resolved after ketoconazole treatment. Follicular occlusion was not present in biopsy specimens obtained from unaffected controls nor was it related to the presence of P orbiculare. These findings suggest that follicular occlusion may be a primary event in the development of this folliculitis, with yeast overgrowth a secondary occurrence. The beneficial effect of ketoconazole in this disease may be due to direct effects on the follicle.

Administration, Oral

Skin surface electron microscopy in Pityrosporum folliculitis. The role of follicular occlusion in disease and the response to oral ketoconazole.

The yeast Pityrosporum orbiculare is thought to cause the folliculitis associated with seborrheic eczema. However, a combination of mechanical and microbiological factors may be involved, with follicular occlusion leading to yeast overgrowth and folliculitis. Scanning electron microscopy was used to investigate this hypothesis. Skin biopsy specimens obtained from patients with Pityrosporum folliculitis were examined by scanning electron microscopy before and after oral ketoconazole therapy. Patients with active disease showed occlusion of noninflamed follicles, which resolved after ketoconazole treatment. Follicular occlusion was not present in biopsy specimens obtained from unaffected controls nor was it related to the presence of P orbiculare. These findings suggest that follicular occlusion may be a primary event in the development of this folliculitis, with yeast overgrowth a secondary occurrence. The beneficial effect of ketoconazole in this disease may be due to direct effects on the follicle.

Administration, Oral

Pityrosporum folliculitis in the Philippines: diagnosis, prevalence, and management.

Sixty-eight typical cases were studied to define the course of Pityrosporum folliculitis in a tropical setting. Contrary to reports in the literature, we found Pityrosporum folliculitis to be polymorphic. The "molluscoid" comedopapule was the most characteristic and common lesion, and it yielded consistently high spore counts. The face was commonly involved. To establish the diagnosis, we used direct microscopy of potassium hydroxide/Parker blue-black ink mounts of the lower poles of comedonal plugs. Pityrosporum folliculitis is common in the Philippines, although our adult controls had a low incidence of skin carriage of Pityrosporum orbiculare on the face compared with those reported in the West. Pityrosporum folliculitis coexisted with acne vulgaris in 56% of patients, and the addition of antimycotics to the acne regimen produced dramatic clearing of lesions.

Acne Vulgaris

Pustular folliculitis associated with Demodex folliculorum.

A 49-year-old man presented with an acute onset of folliculitis on his right cheek. The folliculitis was unresponsive to antibiotics. A potassium hydroxide preparation of a scraping from the affected area revealed the presence of numerous Demodex mites. The patient was treated with topical crotamiton (Eurax) cream resulting in rapid resolution of the folliculitis. We believe that this case represents a localized pustular folliculitis resulting from a heavy infestation with Demodex folliculorum. In spite of more than 50 years of investigation, the role of D. folliculorum in human cutaneous disease remains controversial.

Folliculitis

Whirlpool-associated folliculitis caused by Pseudomonas aeruginosa: report of an outbreak and review.

An outbreak of folliculitis caused by Pseudomonas aeruginosa serotype O:7 occurred among the guests of a hotel in St. John's, Newfoundland, Canada, and the source of the infection was traced to the hotel whirlpool. Of 36 persons who used the whirlpool, 26 (72%) developed folliculitis within 1 to 5 days after exposure; the attack rate was significantly higher for children (90%) than for adults (50%). The rash characteristics were consistent with those of Pseudomonas folliculitis previously described (T. L. Gustafson, J. D. Band, R. H. Hutcheson, Jr., and W. Schaffner, Rev. Infect. Dis. 5:1-8, 1983). This is considered to be the first outbreak in which P. aeruginosa serotype O:7 has been incriminated. Published reports to date of outbreaks of Pseudomonas folliculitis associated with the use of whirlpools, hot tubs, swimming pools, etc., were reviewed.

Adolescent

Nosocomial outbreak of Pseudomonas aeruginosa folliculitis associated with a physiotherapy pool.

Outbreaks of community-acquired Pseudomonas aeruginosa folliculitis have recently been described in association with health spa whirlpools. In February 1984 we detected an outbreak of Pseudomonas folliculitis among hospital staff and patients using a swimming pool in a newly constructed physiotherapy unit. A rash developed in 5 (45%) of the 11 physiotherapists who had used the pool, as compared with 0 of the 17 who had not (p less than 0 005). Pseudomonas folliculitis also developed in 6 (21%) of 29 outpatients and 4 (33%) of 12 inpatients who had used the facility; Pseudomonas infection of a surgical wound also developed in 1 of the 4 inpatients. The epidemic curve was consistent with a continuing common-source outbreak. P. aeruginosa, serotype O:10, was isolated from three physiotherapists, the patient with an infected surgical wound and the pool. A case-control study of pool users did not identify risk factors for infection, although the physiotherapists had spent longer in the pool than had the patients. After hyperchlorination and structural repairs to the pool, no further cases were identified among pool users. This outbreak is the first reported nosocomial outbreak of Pseudomonas folliculitis. Further investigation is needed to determine the risk of serious Pseudomonas infections in hospitalized patients using physiotherapy pools.

Adult

Hot tub dermatitis: a familial outbreak of Pseudomonas folliculitis.

Pseudomonas folliculitis resulting from the use of spa pools, whirlpools, and hot tubs is a newly described disease that typically develops 8 to 48 hours after exposure in a contaminated facility. The eruption consists of pruritic papules, papulopustules, nodules, and urticarial lesions on the trunk and extremities. A family of three and a neighbor developed Pseudomonas folliculitis after using a home hot tub from which P. aeruginosa was cultured. Skin biopsies showed an acute, suppurative folliculitis and dermal abscess formation. Although the eruption usually resolves spontaneously within 7 to 10 days, proper maintenance of equipment and adequate disinfectant levels are necessary to prevent its recurrence.

Baths

Perforating folliculitis in association with hemodialysis.

Five patients developed pruritic, keratotic, perforating follicular papules and nodules within 2 months of starting maintenance hemodialysis. Clinically and histologically, the papules and nodules showed the features of perforating folliculitis with superimposed prurigo nodularis, a condition not previously described in patients on maintenance dialysis. The patients with perforating folliculitis constituted 10% of our patients on dialysis during the period of this study. Notably, all five patients were black and had chronic renal failure secondary to diabetic nephropathy. The precise pathogenesis of perforating folliculitis in these patients is unclear at this time.

Adult

Folliculitis of the buttocks and pinworms. A case report.

Folliculitis, both superficial and deep, has increased in frequency, particularly during the warm months of the year. The frictional trauma from tight-fitting jeans, with overhydration and maceration of the skin, has contributed to the increase. Folliculitis is usually accompanied by pruritus, but when pruritus precedes the folliculitis, there may be another cause in addition to the wearing of tight clothes. Such was the case in our patient who had anal pinworms (Enterobius vermicularis).

Adult

Eosinophilic pustular folliculitis in infancy.

Five infants under 1 year of age were reported with a syndrome of recurrent crops of pruritic papulopustules of the scalp. In three children there were also intermittent outbreaks on the trunk and extremities. Cultures showed the pustules to be sterile. Biopsies of scalp and skin tissues showed eosinophilic folliculitis. Some patients had eosinophilia during outbreaks of pustules. These cases are similar to the eosinophilic pustular folliculitis reported in a few adult patients with the exception that there was predominant scalp involvement in the children. We propose that eosinophilic pustular folliculitis of infancy is a distinct pustular dermatosis.

Child, Preschool

Pseudomonas aeruginosa gram-negative folliculitis.

Three patients with sudden, unmanageable exacerbation of acne vulgaris were shown to have Gram-negative folliculitis due to Pseudomonas aeruginosa. In each patient, the source of the Pseudomonas proved to be an otitis externa infection. In contrast to previous cases of Gram-negative folliculitis due to Proteus, Escherichia coli, or Klebsiella, the anterior nares were not colonized. Treatment of the otitis externa and the Gram-negative folliculitis with acetic acid compresses and topical antibiotics led to prompt resolution without recurrence.

Acetates

[A classical form of eosinophilic pustular folliculitis--successful therapy with PUVA].

Eosinophilic pustular folliculitis was first defined by Ofuji et al. in 1970 [13]. It is reported most frequently in Japanese patients. It is characterized by the repetitive appearance of sterile papulopustular lesions that heal without scarring. Case reports from outside Japan frequently refer to ulcerating inflammation. We describe a classic form of eosinophilic pustular folliculitis in an European, and we show for the first time that the eosinophilic pustular folliculitis responds well to PUVA treatment.

Adult