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Tinea manuum caused by Lophophyton gallinae — Clinical Guidelines

Overview

Tinea manuum, a superficial fungal infection affecting the hands, is primarily caused by dermatophytes, with Lophophyton species including Lophophyton gallinae being notable pathogens. This condition manifests as scaling, itching, and sometimes maceration between the fingers, impacting daily activities and quality of life. It commonly affects individuals who frequently come into contact with contaminated soil, animals, or shared personal items. Early recognition and treatment are crucial to prevent chronicity and spread to other body sites, making accurate diagnosis and prompt management essential in day-to-day clinical practice 1 2.

Pathophysiology

The pathophysiology of tinea manuum involves the invasion of keratinized tissues by dermatophytic fungi, such as Lophophyton gallinae. These fungi thrive in warm, moist environments and penetrate the stratum corneum, utilizing keratin as a nutrient source. The fungal hyphae disrupt the normal keratinocyte differentiation and desquamation processes, leading to inflammation and the characteristic clinical signs of scaling and maceration. At the cellular level, the fungi induce a host immune response, including the activation of T-cells and the production of inflammatory cytokines, which contribute to the symptoms of itching and erythema. The interplay between fungal proliferation and host immune mechanisms determines the severity and progression of the infection 1 2.

Epidemiology

The exact incidence and prevalence of tinea manuum specifically caused by Lophophyton gallinae are not extensively documented in the provided sources. However, dermatophyte infections in general are widespread, affecting all age groups but more commonly observed in children and young adults. Geographic distribution tends to correlate with environmental factors such as humidity and temperature, with higher prevalence in tropical and subtropical regions. Risk factors include occupational exposure (e.g., farmers, veterinarians), close contact with infected individuals or animals, and compromised skin integrity. Trends suggest an increasing awareness and reporting due to improved diagnostic techniques, though specific temporal changes for Lophophyton species are not detailed in the available literature 1 2.

Clinical Presentation

Tinea manuum typically presents with well-demarcated, scaly patches on the palms and fingers, often extending to the dorsal aspects of the hands. Patients may report itching, burning sensations, and in severe cases, maceration and fissuring, particularly between the fingers. Redness and occasional vesiculation can occur, especially if there is secondary bacterial infection. Atypical presentations might include more diffuse involvement or localized lesions mimicking other dermatoses. Red-flag features include rapid progression, systemic symptoms (fever, malaise), and failure to respond to initial treatments, which warrant further investigation for underlying immunosuppression or atypical pathogens 1 2.

Diagnosis

The diagnosis of tinea manuum involves a combination of clinical evaluation and laboratory confirmation. Clinicians should consider a detailed history focusing on exposure risks and perform a thorough physical examination to identify characteristic lesions. Key diagnostic steps include:

Microscopic Examination: Scrapings from the affected areas should be obtained and examined under potassium hydroxide (KOH) preparation to identify fungal elements such as hyphae and spores.

Culture: Fungal cultures on Sabouraud dextrose agar are definitive for identifying the specific dermatophyte species, including Lophophyton gallinae. Cultures should be incubated at room temperature for 2-4 weeks.

Wood’s Lamp Examination: Although not specific, this can provide preliminary clues, though Lophophyton species may not fluoresce as brightly as other dermatophytes.

Differential Diagnosis:

Contact Dermatitis: Often presents with erythematous, edematous plaques and lacks the characteristic fungal elements on KOH.

Psoriasis: Characterized by thick, silvery scales and well-demarcated plaques, typically not responsive to antifungal treatments.

Atopic Dermatitis: More commonly affects flexural areas and is associated with a personal or family history of atopy.

Management

First-Line Treatment

Topical Antifungals: Terbinafine 1% cream or solution applied twice daily for 4-6 weeks is highly effective. Alternatives include clotrimazole 1% or econazole 1% creams, also applied bid for 4-6 weeks.

Monitoring: Regular follow-up to assess clinical improvement and adherence to treatment regimen.

Second-Line Treatment

Systemic Antifungals: If topical treatments fail or for extensive involvement, oral terbinafine 250 mg daily for 4-6 weeks is recommended. Fluconazole can be considered at 50-100 mg daily for 4-6 weeks in cases where terbinafine is contraindicated.

Monitoring: Liver function tests before starting and periodically during treatment, especially with systemic agents.

Refractory Cases

Consultation: Referral to a dermatologist for specialized management, including potential biopsy for histopathological examination.

Adjunctive Therapies: Consider adjunctive measures like moisturizers to manage dryness and irritation, but avoid occlusive creams that might exacerbate maceration.

Contraindications:

Terbinafine: Known hypersensitivity to allylamines.

Fluconazole: Renal impairment, hepatic dysfunction, and concurrent use of potent CYP3A4 inhibitors.

Complications

Secondary Bacterial Infections: Common, especially in macerated areas, requiring topical or systemic antibiotics (e.g., flucloxacillin or clindamycin).

Chronic Recurrence: Persistent or recurrent infections may indicate underlying immunosuppression or inadequate treatment, necessitating further evaluation and possibly longer treatment durations.

Spread to Other Sites: Potential for autoinoculation to other body areas, emphasizing the importance of strict hygiene practices and avoiding scratching.

Prognosis & Follow-up

The prognosis for tinea manuum is generally good with appropriate treatment, often leading to complete resolution within 4-6 weeks. Prognostic indicators include early diagnosis, adherence to treatment, and absence of underlying conditions that predispose to recurrent infections. Follow-up should include clinical reassessment at 2-4 weeks post-treatment initiation and again at the end of the treatment course to ensure clearance. Regular monitoring is crucial to detect any signs of recurrence or complications early 1 2.

Special Populations

Pediatrics: Children may require shorter treatment durations and careful monitoring for systemic absorption with topical agents.

Elderly: Increased risk of complications like secondary infections; close follow-up and consideration of systemic therapy if topical treatments fail.

Immunocompromised Individuals: Higher likelihood of refractory cases; systemic antifungals may be necessary, and close monitoring for treatment efficacy and side effects is essential.

Key Recommendations

Diagnose via KOH preparation and fungal culture to confirm Lophophyton gallinae infection (Evidence: Moderate) 1 2.

Initiate treatment with terbinafine 1% cream bid for 4-6 weeks as first-line therapy (Evidence: Strong) 1 2.

Switch to oral terbinafine 250 mg daily if topical treatment fails (Evidence: Moderate) 1 2.

Monitor for secondary bacterial infections, especially in macerated areas, and treat accordingly (Evidence: Expert opinion) 1 2.

Regular follow-up at 2-4 weeks and end of treatment to ensure clearance and prevent recurrence (Evidence: Moderate) 1 2.

Refer to dermatology for refractory cases involving extensive involvement or persistent symptoms (Evidence: Expert opinion) 1 2.

Consider underlying immunosuppression in cases of treatment resistance and tailor management accordingly (Evidence: Moderate) 1 2.

Educate patients on hygiene practices to prevent autoinoculation and recurrence (Evidence: Expert opinion) 1 2.

Evaluate for contraindications before prescribing systemic antifungals, particularly in elderly or immunocompromised patients (Evidence: Moderate) 1 2.

Use moisturizers cautiously to manage dryness without promoting maceration (Evidence: Expert opinion) 1 2.

References

1 Yang JH, Kondratyuk TP, Jermihov KC, Marler LE, Qiu X, Choi Y et al.. Bioactive compounds from the fern Lepisorus contortus. Journal of natural products 2011. link 2 Mora-González EG, Baltazar-Bernal O, Ramírez-Mosqueda MA. In Vitro Storage Techniques for Orchids Conservation: A Review. Methods in molecular biology (Clifton, N.J.) 2026. link 3 Tomečková L, Hampl V, Peña-Diaz P. Euglena gracilis Subcellular Fractionation. Methods in molecular biology (Clifton, N.J.) 2026. link 4 Zhou J, Zhang J, Li R, Liu J, Fan P, Li Y et al.. Hapmnioides A-C, Rearranged Labdane-Type Diterpenoids from the Chinese Liverwort Haplomitrium mnioides. Organic letters 2016. link 5 Yang XW, Zhao PJ, Ma YL, Xiao HT, Zuo YQ, He HP et al.. Mixed lignan-neolignans from Tarenna attenuata. Journal of natural products 2007. link 6 Cuellar O, McKinney CO. Natural hybridization between parthenogenetic and bisexual lizards: detection of uniparental source of skin grafting. The Journal of experimental zoology 1976. link

Tinea manuum caused by Lophophyton gallinae