Comamonas testosteroni, formerly known as Pseudomonastestosteroni, is a non-fermenting, gram(-), oxidase(+) bacterium with a wide geographic distribution in water and soil, and a little apparent capacity of causing human infections. We present two cases of Com. testosteroni bacteraemia, occurred to our hospital within a month's period.
ref: http://www.blackwellpublishing.com/eccmid15/abstract.asp?id=37695 . Acessado em 27/01/11
quinta-feira, 27 de janeiro de 2011
Corynebacterium jeikeium
Corynebacterium jeikeium is an opportunistic pathogen primarily of immunocompromised (neutropenic) patients. C. jeikeium isolates are lipophilic (fat-loving), non-spore-forming, Gram-positive rods that vary from short coccobacilli to long bacillary forms. The organisms are non-motile.
The Coryneform bacteria are common inhabitants of healthy human skin and mucous membranes however C. jeikeium differs from other coryneforms by being pathogenic to humans and highly resistant to antibiotics. Although C. jeikeium is a significant opportunistic pathogen the presence of C. jeikeium in the hospital environment is probably the most clinically important aspect of the natural history of this organism. This is because there is recent evidence that drug resistance genes may have transferred from corynebacteria to a Proprionibacterium sp. clinical isolate. Thus, the high incidence of multiply drug-resistant C. jeikeium suggests that this organism may be an important environmental reservoir of drug resistance genes. C. jeikeium is the most frequently recovered medically significant corynebacterial species at intensive care facilities.
Corynebacterium jeikeium causes septicaemia and endocarditis. Infections include those of skin and soft tissue, septicaemia, native and prosthetic valve endocarditis, osteomyelitis, arthritis and ventricular cerebrospinal fluid shunts
The knowledge on the genome architecture of C. jeikeium will provide a fundamental step in understanding not only the cellular physiology and lifestyle but also the molecular and biochemical basis for multiresistance as well as the pathogenic potential of this clinically important species. It is also advantageous that complete genome sequences are available for some nonpathogenic species Corynebacterium for comparative genomic analysis.
REF http://www.ebi.ac.uk/2can/genomes/bacteria/Corynebacterium_jeikeium.html Acessado em 27/01/11
The Coryneform bacteria are common inhabitants of healthy human skin and mucous membranes however C. jeikeium differs from other coryneforms by being pathogenic to humans and highly resistant to antibiotics. Although C. jeikeium is a significant opportunistic pathogen the presence of C. jeikeium in the hospital environment is probably the most clinically important aspect of the natural history of this organism. This is because there is recent evidence that drug resistance genes may have transferred from corynebacteria to a Proprionibacterium sp. clinical isolate. Thus, the high incidence of multiply drug-resistant C. jeikeium suggests that this organism may be an important environmental reservoir of drug resistance genes. C. jeikeium is the most frequently recovered medically significant corynebacterial species at intensive care facilities.
Corynebacterium jeikeium causes septicaemia and endocarditis. Infections include those of skin and soft tissue, septicaemia, native and prosthetic valve endocarditis, osteomyelitis, arthritis and ventricular cerebrospinal fluid shunts
The knowledge on the genome architecture of C. jeikeium will provide a fundamental step in understanding not only the cellular physiology and lifestyle but also the molecular and biochemical basis for multiresistance as well as the pathogenic potential of this clinically important species. It is also advantageous that complete genome sequences are available for some nonpathogenic species Corynebacterium for comparative genomic analysis.
REF http://www.ebi.ac.uk/2can/genomes/bacteria/Corynebacterium_jeikeium.html Acessado em 27/01/11
Arthrobacter sp
Arthrobacter (from the Greek, "jointed small stick”) is a genus of bacteria that is commonly found in soil. All species in this genus are Gram-positive obligate aerobes that are rods during exponential growth and cocci in their stationary phase.
Colonies of Arthrobacter have a greenish metallic center on mineral salts pyridone broth incubated at 20°C. This genus is distinctive because of its unusual habit of "snapping division" in which the outer bacterial cell wall ruptures at a joint (hence its name). Microbiologists refer to the type of cell division in which rods break into cocci as reversion. Under the microscope, these dividing cells appear as chevrons ("V" shapes). Other notable characteristics are that it can use pyridone as its sole carbon source, and that its cocci are resistant to desiccation and starvation.
One species, A. crystallopoieties, has been shown to reduce hexavalent chromium levels in contaminated soil, suggesting that it may be useful in bioremediation. [1]
Arthrobacter chlorophenolicus sp. nov., a species capable of degrading high concentrations of 4-chlorophenol, may also be useful in bioremediation. [2] Arthrobacter sp. strain R1 has been shown to grow on a variety of aromatic compounds, including homocyclic compounds, such as hydroxybenzoates, as well as N-heterocycles, including pyridine and picoline.[3]
Colonies of Arthrobacter have a greenish metallic center on mineral salts pyridone broth incubated at 20°C. This genus is distinctive because of its unusual habit of "snapping division" in which the outer bacterial cell wall ruptures at a joint (hence its name). Microbiologists refer to the type of cell division in which rods break into cocci as reversion. Under the microscope, these dividing cells appear as chevrons ("V" shapes). Other notable characteristics are that it can use pyridone as its sole carbon source, and that its cocci are resistant to desiccation and starvation.
One species, A. crystallopoieties, has been shown to reduce hexavalent chromium levels in contaminated soil, suggesting that it may be useful in bioremediation. [1]
Arthrobacter chlorophenolicus sp. nov., a species capable of degrading high concentrations of 4-chlorophenol, may also be useful in bioremediation. [2] Arthrobacter sp. strain R1 has been shown to grow on a variety of aromatic compounds, including homocyclic compounds, such as hydroxybenzoates, as well as N-heterocycles, including pyridine and picoline.[3]
Cladosporium sp
Cladosporium is the most common of the so-called black molds. It produces a black pigment that protects it from ultraviolet light. This characteristic as well as its growth and dispersal characteristics is likely responsible for its presence and abundance in the environment.
REf: http://healthandenergy.com/cladosporium.htm . Acessado em 27/01/11
Cladosporium is a genus of fungi including some of the most common indoor and outdoor molds. Species produce olive-green to brown or black colonies, and have dark-pigmented conidia that are formed in simple or branching chains.
The many species of Cladosporium are commonly found on living and dead plant material. Some species are plant pathogens, others parasitize other fungi. Cladosporium spores are wind-dispersed and they are often extremely abundant in outdoor air. Indoors Cladosporium species may grow on surfaces when moisture is present
REf http://en.wikipedia.org/wiki/Cladosporium. Acessado em 27/01/11
REf: http://healthandenergy.com/cladosporium.htm . Acessado em 27/01/11
Cladosporium is a genus of fungi including some of the most common indoor and outdoor molds. Species produce olive-green to brown or black colonies, and have dark-pigmented conidia that are formed in simple or branching chains.
The many species of Cladosporium are commonly found on living and dead plant material. Some species are plant pathogens, others parasitize other fungi. Cladosporium spores are wind-dispersed and they are often extremely abundant in outdoor air. Indoors Cladosporium species may grow on surfaces when moisture is present
REf http://en.wikipedia.org/wiki/Cladosporium. Acessado em 27/01/11
Staphylococcus auricularis
It is one of the major species found living in the adult human, external auditory meatus and demonstrate a strong preference for this niche.
REf: The prokaryotes , 3 edition A Handbook on the Biology of Bacteria: BActeria: Firmicutes, Cyanobacteria. Edited by: Martin Dworkin,Stanley Falkow, Eugene Rosenberg, Karl-Heinz Schleifer, ERcke Starckebrandt. Vol. 4. Springer.
http://books.google.com.br/books?id=C5tzLBabUh8C&pg=PA58&lpg=PA58&dq=Staphylococcus+auricularis&source=bl&ots=5WdiVyw03X&sig=5pfRbIT4Fi-5QPQRZHXTuwL5Fxc&hl=pt-BR&ei=sdxBTcujFYL78AbzmenKAQ&sa=X&oi=book_result&ct=result&resnum=10&ved=0CHYQ6AEwCTgU#v=onepage&q=Staphylococcus%20auricularis&f=false . Acesso em 27/01/11
REf: The prokaryotes , 3 edition A Handbook on the Biology of Bacteria: BActeria: Firmicutes, Cyanobacteria. Edited by: Martin Dworkin,Stanley Falkow, Eugene Rosenberg, Karl-Heinz Schleifer, ERcke Starckebrandt. Vol. 4. Springer.
http://books.google.com.br/books?id=C5tzLBabUh8C&pg=PA58&lpg=PA58&dq=Staphylococcus+auricularis&source=bl&ots=5WdiVyw03X&sig=5pfRbIT4Fi-5QPQRZHXTuwL5Fxc&hl=pt-BR&ei=sdxBTcujFYL78AbzmenKAQ&sa=X&oi=book_result&ct=result&resnum=10&ved=0CHYQ6AEwCTgU#v=onepage&q=Staphylococcus%20auricularis&f=false . Acesso em 27/01/11
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