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Bacterial, Mycobacterial, and Spirochetal (Nonvenereal) Infections
Published in Ayşe Serap Karadağ, Lawrence Charles Parish, Jordan V. Wang, Roxburgh's Common Skin Diseases, 2022
Clinical presentation: Several bacteria, including Corynebacteria and Kytococcus sedentarius, Dermatophilus congolensis, and Actinomyces, are able to proliferate on the palms and soles, which is aggravated by excessive sweating. This can be exacerbated by prolonged use of occlusive footwear. These organisms secrete protease enzymes that destroy the stratum corneum, which can create multiple small craters and pits (Figure 6.9). Sulfur compounds produced by these organisms cause the characteristic malodor that can persist on footwear. The affected areas can have a whitish appearance, which is more noticeable after bathing. The pits can coalesce to form larger craters. At times, walking precipitates itching and tenderness.
Bacterial and Atypical Mycobacterial Infections
Published in Clay J. Cockerell, Antoanella Calame, Cutaneous Manifestations of HIV Disease, 2012
Kumar Krishnan, Antoanella Calame, Clay J. Cockerell
Pitted keratolysis (PK) is a cutaneous infection commonly found on weight bearing areas such as the plantar aspect of the foot (31, 32), caused by one of several gram-positive organisms. While the etiological agent remains elusive, there is an association with Corynebacterium species, Micrococcus (Kytococcus) sedentarius, and Dermatophilus congolensis. The micro-organisms cause a characteristic crateriform lesion measuring 1–7 mm in size. The individual lesions may coalesce to form larger pits.
Randomized, controlled trial testing the effectiveness and safety of 2.5% and 5% benzoyl peroxide for the treatment of pitted keratolysis
Published in Journal of Dermatological Treatment, 2021
Charussri Leeyaphan, Pichaya Limphoka, Rungsima Kiratiwongwan, Punyawee Ongsri, Sumanas Bunyaratavej
Pitted keratolysis (PK) is a common skin disease caused by various Gram-positive bacteria, including Corynebacterium species, Kytococcus sedentarius, Dermophilus congolensis, and Actinomyces species (1–3). These bacteria create small tunnels in the stratum corneum, resulting in pitted lesions in the plantar areas (1,3). This condition is frequently accompanied by malodorous feet (2,4,5) and is commonly found among young male adults, especially soldiers, miners, and athletes (3,4). The prevalence of PK among naval cadets has been reported to be 38.7% (4). The predisposing factors for PK are pedal hyperhidrosis and prolonged foot occlusion (5). Although this condition is generally not painful, PK and foot odor present adverse effects on patients’ quality of life (6).