Trichophyton verrucosum

Trichophyton verrucosum chlamydospores

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Trichophyton verrucosum BCP

Species of fungus

Trichophyton verrucosum is a zoophilic dermatophyte fungus that primarily infects cattle but can also cause dermatophytosis in humans. This species is known for its ability to cause ringworm infections, particularly in agricultural settings where humans come into close contact with infected animals.

Morphology

Trichophyton verrucosum is characterized by its slow-growing, white to cream-colored colonies. The fungus produces both macroconidia and microconidia, although these structures are often sparse. The macroconidia are large, thick-walled, and have a distinctive "rat-tail" appearance, while the microconidia are small and club-shaped.

Pathogenicity

Trichophyton verrucosum is a common cause of ringworm in cattle, leading to lesions on the skin that can spread to humans through direct contact. In humans, the infection typically presents as tinea corporis, tinea capitis, or tinea barbae, depending on the site of infection. The fungus thrives in warm, moist environments, making it prevalent in areas with high humidity and poor sanitation.

Diagnosis

Diagnosis of Trichophyton verrucosum infection is typically made through microscopic examination and culture of skin scrapings. The fungus can be identified by its characteristic morphology and growth patterns on specific media such as Sabouraud dextrose agar.

Treatment

Treatment of infections caused by Trichophyton verrucosum involves the use of antifungal medications. Topical treatments such as clotrimazole or miconazole are often effective for mild infections, while more severe cases may require systemic antifungal therapy with drugs like terbinafine or itraconazole.

Prevention

Preventing Trichophyton verrucosum infections involves maintaining good hygiene practices, especially in agricultural settings. Regular cleaning and disinfection of animal housing, as well as the use of protective clothing and gloves when handling infected animals, can help reduce the risk of transmission.

Related Pages

• Dermatophyte
• Ringworm
• Tinea corporis
• Tinea capitis
• Tinea barbae
• Antifungal