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Microsporum
''Microsporum'' is a genus of fungi that causes tinea capitis, tinea corporis, ringworm, and other dermatophytoses (fungal infections of the skin). ''Microsporum'' forms both macroconidia (large asexual reproductive structures) and microconidia (smaller asexual reproductive structures) on short conidiophores. Macroconidia are hyaline, multiseptate, variable in form, fusiform, spindle-shaped to obovate, 7–20 by 30–160 um in size, with thin or thick echinulate to verrucose cell walls. Their shape, size and cell wall features are important characteristics for species identification. Microconidia are hyaline, single-celled, pyriform to clavate, smooth-walled, 2.5–3.5 by 4–7 um in size and are not diagnostic for any one species. The separation of this genus from '' Trichophyton'' is essentially based on the roughness of the macroconidial cell wall, although in practice this may sometimes be difficult to observe. Seventeen species of ''Microsporum'' have been ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsporum Canis
''Microsporum canis'' is a pathogenic, asexual fungus in the phylum Ascomycota that infects the upper, dead layers of skin on domesticated cats, and occasionally dogs and humans. The species has a worldwide distribution. Taxonomy and evolution ''Microsporum canis'' reproduces by means of two conidial forms, large, spindle-shaped, multicelled macroconidia and small, single-celled microconidia. First records of ''M. canis'' date to 1902. Evolutionary studies have established that ''M. canis'', like the very closely related sibling species ''M. distortum'' and ''M. equinum'', is a genetic clone derived from the sexually reproducing species, ''Arthroderma otae''. Members of Ascomycota often possess conspicuous asexual and sexual forms that can coexist in time and space. ''Microsporum canis'' exemplifies a common situation in ascomycetous fungi in which, over time, one mating type strain has undergone habitat divergence from the other and established a self-sustaining reproductive p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsporum Fulvum
''Microsporum fulvum'' is a wildly-distributed dermatophyte species in the Fungi Kingdom. It is known to be a close relative to other dermatophytes such as '' Trichophyton and'' '' Epidermophyton.'' The fungus is common within soil environments and grows well on keratinized material, such as hair, nails and dead skin. It is recognized as an opportunistic fungal pathogen capable of causing cutaneous mycoses in humans and animals. Originally, the fungus was thought to be ''Microsporum gypseum'' until enhanced genetic examination separated the two as distinct species in 1963. History and taxonomy ''Microsporum fulvum'' was first documented in 1909 as ''Microsporum gypseum'' by Weitzman et al. ( Argentina Medical Society)''.'' The fungus was thought to be the imperfect state of the anamorphic, asexually reproducing, ''M. gypseum.'' However, in Stockdale (1963) ''M. fulvum'' was considered and described as its own species, ''Nannizzia fulva'', the perfect state of the fungus. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsporum Amazonicum
''Microsporum'' is a genus of fungi that causes tinea capitis, tinea corporis, ringworm, and other dermatophytoses (fungal infections of the skin). ''Microsporum'' forms both macroconidia (large asexual reproductive structures) and microconidia (smaller asexual reproductive structures) on short conidiophores. Macroconidia are hyaline, multiseptate, variable in form, fusiform, spindle-shaped to obovate, 7–20 by 30–160 um in size, with thin or thick echinulate to verrucose cell walls. Their shape, size and cell wall features are important characteristics for species identification. Microconidia are hyaline, single-celled, pyriform to clavate, smooth-walled, 2.5–3.5 by 4–7 um in size and are not diagnostic for any one species. The separation of this genus from ''Trichophyton'' is essentially based on the roughness of the macroconidial cell wall, although in practice this may sometimes be difficult to observe. Seventeen species of ''Microsporum'' have been descr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsporum Distortum
''Microsporum'' is a genus of fungi that causes tinea capitis, tinea corporis, ringworm, and other dermatophytoses (fungal infections of the skin). ''Microsporum'' forms both macroconidia (large asexual reproductive structures) and microconidia (smaller asexual reproductive structures) on short conidiophores. Macroconidia are hyaline, multiseptate, variable in form, fusiform, spindle-shaped to obovate, 7–20 by 30–160 um in size, with thin or thick echinulate to verrucose cell walls. Their shape, size and cell wall features are important characteristics for species identification. Microconidia are hyaline, single-celled, pyriform to clavate, smooth-walled, 2.5–3.5 by 4–7 um in size and are not diagnostic for any one species. The separation of this genus from ''Trichophyton'' is essentially based on the roughness of the macroconidial cell wall, although in practice this may sometimes be difficult to observe. Seventeen species of ''Microsporum'' have been de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsporum Cookei
''Microsporum'' is a genus of fungi that causes tinea capitis, tinea corporis, ringworm, and other dermatophytoses (fungal infections of the skin). ''Microsporum'' forms both macroconidia (large asexual reproductive structures) and microconidia (smaller asexual reproductive structures) on short conidiophores. Macroconidia are hyaline, multiseptate, variable in form, fusiform, spindle-shaped to obovate, 7–20 by 30–160 um in size, with thin or thick echinulate to verrucose cell walls. Their shape, size and cell wall features are important characteristics for species identification. Microconidia are hyaline, single-celled, pyriform to clavate, smooth-walled, 2.5–3.5 by 4–7 um in size and are not diagnostic for any one species. The separation of this genus from ''Trichophyton'' is essentially based on the roughness of the macroconidial cell wall, although in practice this may sometimes be difficult to observe. Seventeen species of ''Microsporum'' have been descr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsporum Gallinae
''Microsporum gallinae'' is a fungus of the genus ''Microsporum'' that causes dermatophytosis, commonly known as ringworm. Chickens represent the host population of ''Microsporum gallinae'' but its opportunistic nature allows it to enter other populations of fowl, mice, squirrels, cats, dogs and monkeys. Human cases of ''M. gallinae'' are rare, and usually mild, non-life-threatening superficial infections. Taxonomy and naming ''Microsporum gallinae'' was first identified in 1881 by Megnin from chicken favus, and named ''Epidermophyton gallinae''. It was later transferred from the Epidermophyton genus, and classified in the Trichophyton genus, as ''T. gallinae''. The identification of rough-walled macroconidia, a hallmark of the Microsporum genus, lead to the dermatophyte being classified as ''M. gallinae''. There is still debate about the phylogenetic placement of this dermatophyte, but the accepted name is ''Microsporum gallinae''. Analysis of its DNA sequences by PCR shows ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsporum Gypseum
''Microsporum gypseum'' is a soil-associated dermatophyte that occasionally is known to colonise and infect the upper dead layers of the skin of mammals. The name refers to an asexual "form-taxon" that has been associated with four related biological species of fungi: the pathogenic taxa '' Arthroderma incurvatum'', ''A. gypsea'', '' A. fulva'' and the non-pathogenic saprotroph ''A. corniculata''. More recent studies have restricted ''M. gypseum'' to two teleomorphic species ''A. gypseum'' and ''A. incurvatum''. The conidial states of ''A. fulva'' and ''A. corniculata'' have been assigned to ''M. fulvum'' and ''M. boullardii''. Because the anamorphic states of these fungi are so similar, they can be identified reliably only by mating. Two mating strains have been discovered, "+" and "–". The classification of this species has been based on the characteristically rough-walled, blunt, club-shaped, multicelled macroconidia. Synonyms include ''Achorion gypseum'', ''Microsporum flave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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