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Trichophyton rubrum is a dermatophytic fungus in the phylum Ascomycota. It is an exclusively clonal, [ 2 ] anthropophilic saprotroph that colonizes the upper layers of dead skin, and is the most common cause of athlete's foot , fungal infection of nail, jock itch , and ringworm worldwide. [ 3 ]
Trichophyton is a genus of fungi, which includes the parasitic varieties that cause tinea, including athlete's foot, ringworm, jock itch, and similar infections of the nail, beard, skin and scalp. Trichophyton fungi are molds characterized by the development of both smooth-walled macro- and microconidia .
Trichophyton mentagrophytes is one of three common fungi which cause ringworm in companion animals and frequently isolated from dogs, cats, rabbits, guinea pigs and other rodents. [2] [3] [4] It is the most common or one of the most common fungi that cause zoonotic skin disease (i.e., transmission of mycotic skin disease from species to species ...
Children from ages 3–7 are most commonly infected with tinea capitis. [3] Trichophyton tonsurans is the most common cause of out breaks of tinea capitis in children, and is the main cause of endothrix (inside hair) infections. Trichophyton rubrum is also a very common cause of favus, a form of tinea capitis in which crusts are seen on the scalp.
A 2002 study looking at 445 samples of dermatophytes in patients in Goiânia, Brazil found the most prevalent type to be Trichophyton rubrum (49.4%), followed by Trichophyton mentagrophytes (30.8%), and Microsporum canis (12.6%). [36]
The hair perforation test, also known as an in vitro hair perforation test, is a laboratory test used to help distinguish the isolates of dermatophytes, such as Trichophyton mentagrophytes and its variants. [1] The test is performed by placing an organism into a Petri dish containing water, yeast extract, and hair. After incubation for 4 week ...
[3] [7] Often the feet are affected for several years before symptoms of a diffuse scaling rash on the palm of one hand appear, which is when most affected people then seek medical help. [7] The most common causative organism is Trichophyton rubrum. [3] The condition is more likely to occur in people who sweat more. [4]
Athlete's foot is most commonly caused by the molds known as Trichophyton rubrum and T. mentagrophytes, [22] but may also be caused by Epidermophyton floccosum. [ 23 ] [ 24 ] Most cases of athlete's foot in the general population are caused by T. rubrum ; however, the majority of athlete's foot cases in athletes are caused by T. mentagrophytes .