|
Exophiala Pisciphila
''Exophiala pisciphila'' is a mesophilic black yeast and member of the dark septate endophytes. This saprotrophic fungus is found commonly in marine and soil environments. It is abundant in harsh environments like soil contaminated with heavy metals. ''E. pisciphila'' forms symbiotic relationships with various plants by colonizing on roots, conferring resistance to drought and heavy metal stress. It is an opportunistic pathogen that commonly causes infections in captive fish and amphibians, while rarely causing disease in humans. Secondary metabolites produced by this species have potential clinical antibiotic and antiretroviral applications. History and taxonomy In 1969, Nikola Fijan first described a systemic mycosis outbreak in channel catfish from a pond in Alabama and identified it as ''Exophiala salmonis''. In 1974, Michael McGinnis and Libero Ajello reevaluated the fungus and identified it as a new species ''Exophiala pisciphila''. The specific epithet ''pisciphila'' is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesophile
A mesophile is an organism that grows best in moderate temperature, neither too hot nor too cold, with an optimum growth range from . The optimum growth temperature for these organisms is 37°C. The term is mainly applied to microorganisms. Organisms that prefer extreme environments are known as extremophiles. Mesophiles have diverse classifications, belonging to two domains: Bacteria, Archaea, and to kingdom Fungi of domain Eucarya. Mesophiles belonging to the domain Bacteria can either be gram-positive or gram-negative. Oxygen requirements for mesophiles can be aerobic or anaerobic. There are three basic shapes of mesophiles: coccus, bacillus, and spiral. Habitat The habitats of mesophiles can include cheese and yogurt. They are often included during fermentation of beer and wine making. Since normal human body temperature is 37 °C, the majority of human pathogens are mesophiles, as are most of the organisms comprising the human microbiome. Mesophiles vs. extremophiles Meso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbiosis
Symbiosis (from Greek , , "living together", from , , "together", and , bíōsis, "living") is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic. The organisms, each termed a symbiont, must be of different species. In 1879, Heinrich Anton de Bary defined it as "the living together of unlike organisms". The term was subject to a century-long debate about whether it should specifically denote mutualism, as in lichens. Biologists have now abandoned that restriction. Symbiosis can be obligatory, which means that one or more of the symbionts depend on each other for survival, or facultative (optional), when they can generally live independently. Symbiosis is also classified by physical attachment. When symbionts form a single body it is called conjunctive symbiosis, while all other arrangements are called disjunctive symbiosis."symbiosis." Dorland's Illustrated Medical Dictionary. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brazil
Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area and the seventh most populous. Its capital is Brasília, and its most populous city is São Paulo. The federation is composed of the union of the 26 States of Brazil, states and the Federal District (Brazil), Federal District. It is the largest country to have Portuguese language, Portuguese as an List of territorial entities where Portuguese is an official language, official language and the only one in the Americas; one of the most Multiculturalism, multicultural and ethnically diverse nations, due to over a century of mass Immigration to Brazil, immigration from around the world; and the most populous Catholic Church by country, Roman Catholic-majority country. Bounded by the Atlantic Ocean on the east, Brazil has a Coastline of Brazi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exophiala Dermatitidis
''Exophiala dermatitidis'' is a thermophilic black yeast, and a member of the Herpotrichiellaceae. While the species is only found at low abundance in nature, metabolically active strains are commonly isolated in saunas, steam baths, and dish washers. ''Exophiala dermatitidis'' only rarely causes infection in humans, however cases have been reported around the world. In East Asia, the species has caused lethal brain infections in young and otherwise healthy individuals. The fungus has been known to cause cutaneous and subcutaneous phaeohyphomycosis, and as a lung colonist in people with cystic fibrosis in Europe. In 2002, an outbreak of systemic ''E. dermatitidis'' infection occurred in women who had received contaminated steroid injections at North Carolina hospitals. Appearance and general description ''Exophiala dermatitidis'' forms slow growing, brown or black colonies. As is common amongst black yeasts, ''E. dermatitidis'' is an anamorphic fungus with multiple conidial fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melanin
Melanin (; from el, μέλας, melas, black, dark) is a broad term for a group of natural pigments found in most organisms. Eumelanin is produced through a multistage chemical process known as melanogenesis, where the oxidation of the amino acid tyrosine is followed by polymerization. The melanin pigments are produced in a specialized group of cells known as melanocytes. Functionally, eumelanin serves as protection against Ultraviolet, UV radiation. There are five basic types of melanin: eumelanin, pheomelanin, neuromelanin, allomelanin and pyomelanin. The most common type is eumelanin, of which there are two types— brown eumelanin and black eumelanin. Pheomelanin, which is produced when melanocytes are malfunctioning due to derivation of the gene to its recessive format is a cysteine-derivative that contains polybenzothiazine portions that are largely responsible for the of red yellow tint given to some skin or hair colors. Neuromelanin is found in the brain. Research ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phialide
The phialide ( ; el, phialis, diminutive of phiale, a broad, flat vessel) is a flask-shaped projection from the vesicle (dilated part of the top of conidiophore) of certain fungi. It projects from the mycelium without increasing in length unless a subsequent increase in the formation of conidia occurs. It is the end cell of a phialosphore. See also *Ascomycete Ascomycota is a phylum of the kingdom Fungi that, together with the Basidiomycota, forms the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes. It is the largest phylum of Fungi, with over 64,000 species. The defi ... References Fungal morphology and anatomy {{mycology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conidia
A conidium ( ; ), sometimes termed an asexual chlamydospore or chlamydoconidium (), is an asexual, non-motile spore of a fungus. The word ''conidium'' comes from the Ancient Greek word for dust, ('). They are also called mitospores due to the way they are generated through the cellular process of mitosis. The two new haploid cells are genetically identical to the haploid parent, and can develop into new organisms if conditions are favorable, and serve in biological dispersal. Asexual reproduction in ascomycetes (the phylum Ascomycota) is by the formation of conidia, which are borne on specialized stalks called conidiophores. The morphology of these specialized conidiophores is often distinctive between species and, before the development of molecular techniques at the end of the 20th century, was widely used for identification of (''e.g.'' ''Metarhizium'') species. The terms microconidia and macroconidia are sometimes used. Conidiogenesis There are two main types of conidium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conidiation
Conidiation is a biological process in which filamentous fungi reproduce asexually from spores. Rhythmic conidiation is the most obvious output of fungal circadian rhythms. ''Neurospora'' species are most often used to study this rhythmic conidiation. Physical stimuli, such as light exposure and mechanical injury to the mycelium trigger conidiation; however, conidiogenesis itself is a holistic response determined by the cell's metabolic state, as influenced by the environment and endogenous biological rhythms. See also * Conidium A conidium ( ; ), sometimes termed an asexual chlamydospore or chlamydoconidium (), is an Asexual reproduction, asexual, non-motility, motile spore of a fungus. The word ''conidium'' comes from the Ancient Greek word for dust, ('). They are al ... References Further reading * Mycology {{Mycology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exophiala Jeanselmei
''Exophiala jeanselmei'' is a saprotrophic fungus in the family Herpotrichiellaceae. Four varieties have been discovered: ''Exophiala jeanselmei'' var. ''heteromorpha'', ''E. jeanselmei'' var. ''lecanii-corni'', ''E. jeanselmei'' var. ''jeanselmei'', and ''E. jeanselmei var. castellanii''. Other species in the genus ''Exophiala'' such as '' E. dermatitidis'' and '' E. spinifera'' have been reported to have similar annellidic conidiogenesis and may therefore be difficult to differentiate. History ''Exophiala jeanselmei'' was first isolated in 1928 by Jeanselme from a case of black mycetoma on the foot. The nomenclature was based on the fungus' morphological characteristics, hence, it was originally classified as ''Torula jeanselmei'' because of its yeast like shape when grown in culture. It was later reclassified by McGinnis and Padhye in 1977 as ''Exophiala jeanselmei'' after further research on conidiogenesis. Morphology In culture, ''E. jeanselmei'' p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arabitol
Arabitol, or arabinitol, is a sugar alcohol. It can be formed by the reduction of either arabinose or lyxose. Some organic acid tests check for the presence of D-arabitol, which may indicate overgrowth of intestinal microbes such as ''Candida albicans'' or other yeast/fungus 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 th ... species. References External links * Sugar alcohols {{alcohol-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nutrient Agar
Nutrient agar is a general purpose liquid medium supporting growth of a wide range of non-fastidious organisms. It typically contains ( mass/volume): * 0.5% peptone - this provides organic nitrogen * 0.3% beef extract/yeast extract - the water-soluble content of these contribute vitamins, carbohydrates, nitrogen, and salts * 1.5% agar - this gives the mixture solidity * 0.5% sodium chloride - this gives the mixture proportions similar to those found in the cytoplasm of most organisms * distilled water - water serves as a transport medium for the agar's various substances * pH adjusted to neutral (6.8) at . Nutrient broth has the same composition,but lacks agar. These ingredients are combined and boiled for approximately one minute to ensure they are mixed and then sterilized by autoclaving, typically at for 15 minutes. Then they are cooled to around and poured into Petri dishes which are covered immediately. Once the dishes hold solidified agar, they are stored upside d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potato Dextrose Agar
Potato dextrose agar (BAM Media M127 from the U.S. ) and potato dextrose broth are common microbiological growth media made from and . Potato dextrose agar (abbreviated "PDA") is the most widely used mediu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> Brazil")
