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Malassezia
''Malassezia'' (formerly known as ''Pityrosporum'') is a genus of fungi. It is the sole genus in family Malasseziaceae, which is the only family in order Malasseziales, itself the single member of class Malasseziomycetes. ''Malassezia'' species are naturally found on the skin surfaces of many animals, including humans. In occasional opportunistic infections, some species can cause hypopigmentation or hyperpigmentation on the trunk and other locations in humans. Allergy tests for these fungi are available. Systematics Due to progressive changes in their nomenclature, some confusion exists about the naming and classification of ''Malassezia'' yeast species. Work on these yeasts has been complicated because they require specific growth media and grow very slowly in laboratory culture. ''Malassezia'' were originally identified by the French scientist Louis-Charles Malassez in the late nineteenth century. Raymond Sabouraud identified a dandruff-causing organism in 1904 and called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pityrosporum Folliculitis 2
''Malassezia'' (formerly known as ''Pityrosporum'') is a genus of fungi. It is the sole genus in family (biology), family Malasseziaceae, which is the only family in order (biology), order Malasseziales, itself the single member of class (biology), class Malasseziomycetes. ''Malassezia'' species are naturally found on the skin surfaces of many animals, including humans. In occasional opportunistic infections, some species can cause hypopigmentation or hyperpigmentation on the trunk and other locations in humans. Allergy tests for these fungi are available. Systematics Due to progressive changes in their nomenclature, some confusion exists about the naming and classification of ''Malassezia'' yeast species. Work on these yeasts has been complicated because they require specific growth media and grow very slowly in microbiological culture, laboratory culture. ''Malassezia'' were originally identified by the French scientist Louis-Charles Malassez in the late nineteenth century. Ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malassezia Cuniculi
''Malassezia'' (formerly known as ''Pityrosporum'') is a genus of fungi. It is the sole genus in family Malasseziaceae, which is the only family in order Malasseziales, itself the single member of class Malasseziomycetes. ''Malassezia'' species are naturally found on the skin surfaces of many animals, including humans. In occasional opportunistic infections, some species can cause hypopigmentation or hyperpigmentation on the trunk and other locations in humans. Allergy tests for these fungi are available. Systematics Due to progressive changes in their nomenclature, some confusion exists about the naming and classification of ''Malassezia'' yeast species. Work on these yeasts has been complicated because they require specific growth media and grow very slowly in laboratory culture. ''Malassezia'' were originally identified by the French scientist Louis-Charles Malassez in the late nineteenth century. Raymond Sabouraud identified a dandruff-causing organism in 1904 and called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malassezia Brasiliensis
''Malassezia'' (formerly known as ''Pityrosporum'') is a genus of fungi. It is the sole genus in family Malasseziaceae, which is the only family in order Malasseziales, itself the single member of class Malasseziomycetes. ''Malassezia'' species are naturally found on the skin surfaces of many animals, including humans. In occasional opportunistic infections, some species can cause hypopigmentation or hyperpigmentation on the trunk and other locations in humans. Allergy tests for these fungi are available. Systematics Due to progressive changes in their nomenclature, some confusion exists about the naming and classification of ''Malassezia'' yeast species. Work on these yeasts has been complicated because they require specific growth media and grow very slowly in laboratory culture. ''Malassezia'' were originally identified by the French scientist Louis-Charles Malassez in the late nineteenth century. Raymond Sabouraud identified a dandruff-causing organism in 1904 and called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dandruff
Dandruff is a skin condition that mainly affects the scalp. Symptoms include flaking and sometimes mild itchiness. It can result in social or self-esteem problems. A more severe form of the condition, which includes inflammation of the skin, is known as seborrhoeic dermatitis. Dandruff in the hair is caused by a fungus called “ Malassezia Globosa” which eats the oil present on the head and when the oil breaks down produce a new substance, “oleic acid”. And many people are allergic to “oleic acid”. And it causes a lot of damage to the skin of the scalp, due to which the skin of the scalp starts falling off a lot. In this, as the layers of damaged skin are continually replaced, the cells are pushed outwards where they die and fall off. The cause is unclear, but believed to involve a number of genetic and environmental factors; the condition may worsen in the winter. It is not due to poor hygiene, and the underlying mechanism involves the excessive growth of skin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis-Charles Malassez
Louis-Charles Malassez (21 September 1842 – 22 December 1909) was a French anatomist and histologist born in Nevers, department of Nièvre. He studied medicine in Paris, where he worked as an ''interne'' from 1867. He served with the 5th Ambulance Corps during the Franco-Prussian War, afterwards returning to Paris, where he worked with distinguished physicians that included Claude Bernard, Jean-Martin Charcot and Pierre Potain. In 1875, he attained the chair of anatomy at Collège de France, and in 1894 he became a member of the '' Académie de Médecine''. He conducted histological research of the blood, and is credited for design of the hemocytometer, a device used to quantitatively measure blood cells. In the field of dentistry, he described residual cells of the epithelial root sheath in the periodontal ligament. These remaining cells are referred to as epithelial cell rests of Malassez (ERM). A genus of fungi called '' Malassezia'' bears his name. The species in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malassezia Caprae
''Malassezia caprae'' is a fungus first isolated in goats, which can cause opportunistic infections in animals. Its type strain The International Code of Nomenclature of Prokaryotes (ICNP) formerly the International Code of Nomenclature of Bacteria (ICNB) or Bacteriological Code (BC) governs the scientific names for Bacteria and Archaea.P. H. A. Sneath, 2003. A short hist ... is MA383=CBS 10434. This species will not grow without any lipid supplementation. It grows slowly and forms small colonies (average diameter ). In the lab, colonies will not grow at temperatures of 40 °C, differing from ''Malassezia sympodialis, M. sympodialis''-related species, such ''Malassezia dermatis, M. dermatis'' and ''Malassezia nana, M. nana'', which can grow at this temperature. ''Malassezia caprae'' cells are ellipsoidal to more or less spherical. References Further reading * * * Basidiomycota Parasitic fungi Yeasts Fungi described in 2007 {{Basidiomycota-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malassezia Furfur
''Malassezia furfur'' (formerly known as ''Pityrosporum ovale'' in its hyphal form) is a species of yeast (a type of fungus) that is naturally found on the skin surfaces of humans and some other mammals. It is associated with a variety of dermatological conditions caused by fungal infections, notably seborrhoeic dermatitis and tinea versicolor. As an opportunistic pathogen, it has further been associated with dandruff, malassezia folliculitis, pityriasis versicolor (alba), and malassezia intertrigo, as well as catheter-related fungemia and pneumonia in patients receiving hematopoietic transplants. The fungus can also affect other animals, including dogs. Background ''Malassezia furfur'' is a fungus that lives on the superficial layers of the dermis. It generally exists as a commensal organism forming a natural part of the human skin microbiota, but it can gain pathogenic capabilities when morphing from a yeast to a hyphal form during its life cycle, through unknown molecular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malassezia Arunalokei
''Malassezia arunalokei'' is a species of yeast-like fungus that was identified as a new to science in 2016. It has been isolated from the skin of both seborrheic dermatitis patients and healthy individuals from India. A combination of several phenotypic characteristics distinguish this species from others in genus '' Malassezia''. These include: colony morphology (when grown on nutrient agar); the absence of activity from the enzyme catalase; growth at ; and the precipitation that results when grown with the chemicals Tween 20 or Cremophor EL. The type strain is NCCPF 127130 (housed at the National Culture Collection of Pathogenic Fungi in New Delhi), which was isolated from the scalp of an individual with seborrheic dermatitis in Chandigarh, India. The most closely related fungus is '' M. restricta'', but the two internal transcribed spacer DNA sequences of these species differ by 6.4%, which meets the generally accepted criteria for genetic distinctiveness. The species e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malassezia Dermatis
''Malassezia dermatis'' is a fungus that can cause opportunistic infection An opportunistic infection is an infection caused by pathogens (bacteria, fungi, parasites or viruses) that take advantage of an opportunity not normally available. These opportunities can stem from a variety of sources, such as a weakened immun ...s in animals. References Ustilaginomycotina Parasitic fungi Yeasts Fungi described in 2002 {{Basidiomycota-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ustilaginomycotina
The Ustilaginomycotina is a subdivision within the division Basidiomycota of the kingdom Fungi. It consists of the classes Ustilaginomycetes and Exobasidiomycetes, and in 2014 the subdivision was reclassified and the two additional classes Malasseziomycetes and Moniliellomycetes added. The name was first published by Doweld in 2001; Bauer and colleagues later published it in 2006 as an isonym. Ustilagomycotina and Agaricomycotina are considered to be sister groups, and they are in turn sister groups to the subdivision Pucciniomycotina. Ustilaginomycotina comprises 115 genera with more than 1700 species. The subdivision is mostly plant parasites on vascular plants, and the distribution of the subdivision is therefore restricted to the distribution of the host. The group is also called the true smut fungi because of the production of teliospores. The name smut is still used as a term since it circumscribes the organization and life cycle of Ustilaginomycotina, but it is not a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungi
A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from the other eukaryotic kingdoms, which by one traditional classification include Plantae, Animalia, Protozoa, and Chromista. A characteristic that places fungi in a different kingdom from plants, bacteria, and some protists is chitin in their cell walls. Fungi, like animals, are heterotrophs; they acquire their food by absorbing dissolved molecules, typically by secreting digestive enzymes into their environment. Fungi do not photosynthesize. Growth is their means of mobility, except for spores (a few of which are flagellated), which may travel through the air or water. Fungi are the principal decomposers in ecological systems. These and other differences place fungi in a single group of related organisms, named the ''Eumycota'' (''t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypopigmentation
Hypopigmentation is characterized specifically as an area of skin becoming lighter than the baseline skin color, but not completely devoid of pigment. This is not to be confused with depigmentation, which is characterized as the absence of all pigment. It is caused by melanocyte or melanin depletion, or a decrease in the amino acid tyrosine, which is used by melanocytes to make melanin. Some common genetic causes include mutations in the tyrosinase gene or OCA2 gene. As melanin pigments tend to be in the skin, eye, and hair, these are the commonly affected areas in those with hypopigmentation. Hypopigmentation is common and approximately one in twenty have at least one hypopigmented macule. Hypopigmentation can be upsetting to some, especially those with darker skin whose hypopigmentation marks are seen more visibly. Most causes of hypopigmentation are not serious and can be easily treated. Presentation Associated conditions It is seen in: * Albinism * Idiopathic guttate hypo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
