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Antibodies, Bacterial definition: Immunoglobulins induced by substances elaborated by BACTERIA that have an antigenic activity.
antibacterial antibody definition: immunoglobulins induced by exposure to bacterial antigens.
Antigens, Bacterial definition: Substances elaborated by bacteria that have antigenic activity.
bacterial antigen definition: substances elaborated by bacteria that have antigenic activity.
Bacterial Adhesion definition: Physicochemical property of fimbriated (FIMBRIAE, BACTERIAL) and non-fimbriated bacteria of attaching to cells, tissue, and nonbiological surfaces. It is a factor in bacterial colonization and pathogenicity.
Bacterial Count definition: The quantitative determination of bacterial populations. The two most widely used methods for determining bacterial numbers are: 1) the standard, or viable, plate count method and 2) spectrophotometric (turbidimetric) analysis.
Bacteria definition: A measurement of the bacteria in a biological specimen.
Bacterial Infections definition: Infections by bacteria, general or unspecified.
bacterial disease definition: infections and associated diseases caused by bacteria, general or unspecified.
Pneumonia, Bacterial definition: Inflammation of the lung parenchyma that is caused by bacterial infections.
bacterial pneumonia definition: pneumonia caused by various species of bacteria; commonly results from bronchogenic spread of infection following microaspiration of secretions.
Bacterial Proteins definition: Proteins found in any species of bacterium.
bacterial protein definition: proteins found in any species of bacterium.
Bacterial Protein definition: Proteins that originated from bacteria sources.
Chromosomes, Bacterial definition: Structures within the nucleus of bacterial cells consisting of or containing DNA, which carry genetic information essential to the cell.
Conjunctivitis, Bacterial definition: Purulent infections of the conjunctiva by several species of gram-negative, gram-positive, or acid-fast organisms. Some of the more commonly found genera causing conjunctival infections are Haemophilus, Streptococcus, Neisseria, and Chlamydia.
Bacterial Conjunctivitis definition: Inflammation of the conjunctiva caused by a variety of bacterial agents.
DNA, Bacterial definition: Deoxyribonucleic acid that makes up the genetic material of bacteria.
bacterial DNA definition: deoxyribonucleic acid that makes up the genetic material of bacteria.
Endocarditis, Bacterial definition: Inflammation of the ENDOCARDIUM caused by BACTERIA that entered the bloodstream. The strains of bacteria vary with predisposing factors, such as CONGENITAL HEART DEFECTS; HEART VALVE DISEASES; HEART VALVE PROSTHESIS IMPLANTATION; or intravenous drug use.
bacterial endocarditis definition: infection occuring when bacteria in the bloodstream (bacteremia) adhere to abnormal heart valves or other damaged heart tissue; characterized by growths, known as vegetations, on the valves or other areas of the heart which can break off, travel to other parts of the body, and cause serious complications; a common causative bacteria is staphylococcus, but any organism entering the bloodstream from any site of prior infection can result in the infection.
Endotoxins definition: Toxins closely associated with the living cytoplasm or cell wall of certain microorganisms, which do not readily diffuse into the culture medium, but are released upon lysis of the cells.
endotoxin definition: toxin closely associated with the living cytoplasm or cell wall of certain microorganisms, which does not readily diffuse into the culture medium, but is released upon lysis of the cells.
Endotoxin definition: The lipopolysaccharide complexes that are part of the outer membrane of the cell wall of Gram-negative bacteria such as E. coli, Salmonella, Shigella, Pseudomonas, Neisseria, Haemophilus, and other leading pathogens. Upon bacterial infections, the lipid component (Lipid A) of endotoxin contributes to its toxicity, while the polysaccharide components contribute to immunogenicity.
Genes, Bacterial definition: The functional hereditary units of BACTERIA.
Fimbriae, Bacterial definition: Thin, hairlike appendages, 1 to 20 microns in length and often occurring in large numbers, present on the cells of gram-negative bacteria, particularly Enterobacteriaceae and Neisseria. Unlike flagella, they do not possess motility, but being protein (pilin) in nature, they possess antigenic and hemagglutinating properties. They are of medical importance because some fimbriae mediate the attachment of bacteria to cells via adhesins (ADHESINS, BACTERIAL). Bacterial fimbriae refer to common pili, to be distinguished from the preferred use of "pili", which is confined to sex pili (PILI, SEX).
pilus definition: minute filamentous appendages of certain bacteria associated with antigenic properties and sex functions of the cell.
fimbrium definition: A proteinaceous hair-like appendage on the surface of bacteria; range from 2-8 nm in diameter. [ISBN:0598034692]
Polysaccharides, Bacterial definition: Polysaccharides found in bacteria and especially bacterial capsules. (Dorland, 28th ed)
bacterial polysaccharide definition: polysaccharides found in bacteria and especially bacterial capsules.
RNA, Bacterial definition: Ribonucleic acid in bacteria having regulatory and catalytic roles as well as involvement in protein synthesis.
bacterial RNA definition: ribonucleic acid in bacteria having regulatory and catalytic roles as well as involvement in protein synthesis.
Spores, Bacterial definition: Heat and stain resistant, metabolically inactive bodies formed within the vegetative cells of bacteria of the genera Bacillus and Clostridium.
Bacterial Capsules definition: An envelope of loose gel surrounding a bacterial cell which is associated with the virulence of pathogenic bacteria. Some capsules have a well-defined border, whereas others form a slime layer that trails off into the medium. Most capsules consist of relatively simple polysaccharides but there are some bacteria whose capsules are made of polypeptides.
bacterial capsule definition: envelope of loose gel surrounding a bacterial cell which is associated with the virulence of pathogenic bacteria; some capsules have a well-defined border, whereas others form a slime layer that trails off into the medium; most capsules consist of relatively simple polysaccharides but there are some bacteria whose capsules are made of polypeptides.
Genome, Bacterial definition: The genetic complement of a BACTERIA as represented in its DNA.
Meningitis, Bacterial definition: Bacterial infections of the leptomeninges and subarachnoid space, frequently involving the cerebral cortex, cranial nerves, cerebral blood vessels, spinal cord, and nerve roots. The type of causative organism varies with age and clinical status (e.g., post-operative, immunodeficient, or post-traumatic states). Clinical manifestations include the acute onset of fever, stiff neck, altered mentation, seizures, and focal neurologic deficits. Death may occur within 24 hours of disease onset. Pathologic features include a purulent exudate in the subarachnoid space, and diffuse inflammation of neural and vascular structures. (From Joynt, Clinical Neurology, 1994, Ch24, pp1-5)
bacterial meningitis definition: bacterial infections of the leptomeninges and subarachnoid space, frequently involving the cerebral cortex, cranial nerves, cerebral blood vessels, spinal cord and nerve roots; causative organism varies with age and clinical status (eg, postoperative, immunodeficient, posttraumatic states); clinical manifestations include the acute onset of fever, stiff neck, altered mentation, seizures, and focal neurologic deficits; death may occur within 24 hours of disease onset; pathologic features include a purulent exudate in the subarachnoid space, and diffuse inflammation of neural and vascular structures.
bacterial genetics definition: heredity, especially the mechanisms of hereditary transmission and the variation of inherited characteristics among bacteria; the genetic constitution of bacteria.
Bacterial Genetics definition: Subdiscipline of genetics with a focus on bacteria.
Adhesins, Bacterial definition: Cell-surface components or appendages of bacteria that facilitate adhesion (BACTERIAL ADHESION) to other cells or to inanimate surfaces. Most fimbriae (FIMBRIAE, BACTERIAL) of gram-negative bacteria function as adhesins, but in many cases it is a minor subunit protein at the tip of the fimbriae that is the actual adhesin. In gram-positive bacteria, a protein or polysaccharide surface layer serves as the specific adhesin. What is sometimes called polymeric adhesin (BIOFILMS) is distinct from protein adhesin.
adhesin definition: family of bacterial surface proteins involved in receptor-specific binding of bacteria to target cells, the first step in infection.
Bacterial Physiological Phenomena definition: Physiological processes and properties of BACTERIA.
exotoxin definition: toxic substances produced by certain bacteria, that are found outside the bacterial cell or free in the culture medium; they are heat labile proteins and are among the most poisonous substances known; some fungi also produce exotoxins.
abscess definition: An enclosed collection of pus in tissues, organs, or confined spaces in the body. An abscess is a sign of infection and is usually swollen and inflamed.
bacterial pigment definition: colored matter produced by bacteria.
Bacterial Chromatophores definition: Organelles of phototrophic bacteria which contain photosynthetic pigments and which are formed from an invagination of the cytoplasmic membrane.
Bacterial Rhodopsins definition: Although similar in name and structure to BACTERIORHODOPSINS from HALOBACTERIUM HALOBIUM, this is a distinct class of proteins found in certain species of PROTEOBACTERIA.
bacterial binding definition: Interacting selectively with any part of a bacterial cell. [GOC:jl]
Bacterial identification definition: Identification, Bacterial
Luciferases, Bacterial definition: Luciferases from BACTERIA such as PHOTOBACTERIUM; VIBRIO; and PHOTORHABDUS.
Bacterial Model definition: Pathways and other molecular and cellular processes which can be manipulated in bacteria, the results of which can be extrapolated to human systems.
bacterial nucleoid definition: The region of a bacterial cell to which the DNA is confined. [GOC:jl]
Bacterial Processes definition: The functions, behavior, and activities of bacteria.
Bacterial Cast Measurement definition: The determination of the amount of bacterial casts present in a urine sample.
CSBACT definition: A measurement of the bacterial casts present in a urine specimen.
Bacterial Shedding definition: The expelling of bacteria from the body. Important routes include the respiratory tract, genital tract, and intestinal tract.