Dermatomycoses Due to Nannizzia praecox (Formerly Microsporum praecox) in Germany: Case Reports and Review of the Literature

Abstract

Nannizzia praecox, formerly known as Microsporum praecox, is a geophilic dermatophyte. Up to now 31 cases of human tinea have been reported in the literature, most of them with an inflammatory course. Three recent cases diagnosed in Germany within 1 year suggest that the fungus might be a more common cause of human dermatophytosis than reported so far. This might be based on the fact that N. praecox is often found in an equine environment and that horse riding is becoming more popular recently.

Molecular and Phenotypic Characterization of Nannizzia (Arthrodermataceae)

“…In contrast, Nannizzia praecox has been described as rare cause of human skin lesions [42], causing tinea corporis and tinea capitis [43]. Most of the infections are reported to be acquired from the equine environment [42,44,45]. Nannizzia corniculata is a geophilic and has not been encountered as a pathogen [46].…”

She Loves Me, She Loves Me Not: On the Dualistic Asexual/Sexual Nature of Dermatophyte Fungi

“…Four Nannizzia species have no known sexual reproduction: N. aenigmaticum, of which only a single human isolate has been reported [107], N. perplicata, a recently described species isolated from a human tinea corporis case [108], N. duboisii [20], and N. praecox, which is likely a geophilic species and has been isolated from soil, horse hair, and humans in contact with horses [109][110][111].…”

Los hongos en la salud y la enfermedad II. Dermatomicosis y dermatofitosis comunes

“…Por ejemplo, Nannizzia gypsea (anteriormente conocido como Microsporum gypseum) es un dermatofito geofílico y cosmopolita presente en suelos, y Nannizzia praecox (anteriormente conocido como Microsporum praecox) es un dermatofito geofílico, presente en suelos y ambientes equinos (sillas de montar, paja, establos, etc.) 6 .…”