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Search Results for: pathogen

Opportunistic pathogen

Opportunistic Pathogen Definition How do we define opportunistic pathogen? The opportunistic pathogen is an infectious... Read More

Pathogen

Definition noun, plural: pathogens An agent causing disease or illness to its host, such as an organism or infectious... Read More

The consequences of antibiotic use in horticulture

Leading articles Frederick R. Falkiner* Department of Clinical Microbiology, Trinity College, Dublin; Central Pathology... Read More

Pathogenicity

Definition noun, plural: pathogenicities The capability (of a pathogenic agent) to cause disease Supplement Pathogenicity... Read More

Virulence

Virulence definition In biology, virulence is defined as the degree by which a pathogenic organism can cause disease.... Read More

Antigenic variation

Definition noun, plural: antigenic variations (immunology) The changing of surface proteins by an infectious agent to evade... Read More

Phagosome

Definition noun plural: phagosomes phag·o·some, ˈfæg əˌsoʊm (cell biology) A vesicle that forms by pinching off... Read More

Zoonosis

Zoonosis Definition Zoonosis is an infectious disease that can be transmitted from an animal to a human host. Originally a... Read More

Antigen

Antigen Definition What is an antigen? A simple definition is that an antigen refers to any substance that triggers an... Read More

Plant Cell Defense

Hydrogen Peroxide Plants release hydrogen peroxide in response to the presence of a fungal invasion, which attacks by... Read More

Suppurative inflammation

Definition noun A type of inflammation accompanied by the discharge of purulent exudate (pus) Supplement Inflammation is a... Read More

Cork

Definition noun, plural: corks (botany) A part of the periderm that protects the inner plant tissues from mechanical... Read More

Biotic factor

Biotic Factor Definition Biotic factors (also known as biotic components) are the living component in an ecosystem. The... Read More

Natural reservoir

Definition noun A reservoir host harboring the pathogen but shows no ill effects and serves as a source of... Read More

Reservoir host

Definition noun A primary host that harbors the pathogen but shows no ill effects and serves as a source of... Read More

Neutralisation

Definition noun (general) The act or process of making neutral. (chemistry) A chemical reaction in which an acid and a base... Read More

Sexually transmitted disease

Definition noun, plural: sexually transmitted diseases (pathology) A disease that is primarily contracted through sexual... Read More

Carrier

Definition noun, plural: carriers (general) A person or object that transports or conveys. (immunology) An asymptomatic... Read More

Dysentery

Definition noun A disorder marked by the inflammation of the intestines particularly the colon, and hemorrhagic... Read More

Anthroponosis

Definition noun, plural: anthroponoses An infectious disease that can be transmitted from a human host to an animal... Read More

Neutralization

Definition noun (general) The act or process of making neutral. (chemistry) A chemical reaction in which an acid and a base... Read More

Phagocytosis

Definition noun The process of engulfing and ingestion of particles by the cell or a phagocyte (e.g. macrophage) to form a... Read More

Malpighian layer

Definition noun The lower layer of epidermis consisting of non-keratinized, viable cells, in contrast to the outer (upper)... Read More

Natural killer T cell

Definition noun, plural: natural killer T cells A T cell capable of destroying infected cells and infective particles upon... Read More

Artificial passive immunity

Definition noun A passive immunity acquired by means of injection of serum containing antibodies to an individual who may... Read More

Natural active immunity

Definition noun An active immunity acquired by experiencing and having recovered from a disease. Supplement Active immunity... Read More

Phagolysosome

Definition noun plural: phagolysosomes (cell biology) A cytoplasmic body that forms from the fusion of phagosome and... Read More

Cutin

Definition noun, plural: cutins (botany) A waxy polymer of hydroxy acids in the cuticle of plants (medicine) An animal... Read More

Passive and Active Types of Immunity

The previous tutorial investigated the role of white blood cells in phagocytosis. White blood cells are also responsible... Read More

Fructooligosaccharide

Definition noun plural: fructooligosaccharides fruc·to·ol·i·go·sac·cha·ride, ɪhɡəʊˈsækəɹaɪd An... Read More

Chlorophyta

Chlorophyta is a taxonomic group (a phylum) comprised of green algae that live in marine habitats. Some of them are found in... Read More

Reactive oxygen species

Definition noun Chemically reactive molecules and ions of oxygen with an unpaired electron Supplement Reactive oxygen... Read More

Phelloderm

Definition noun, plural: phelloderms (botany) A part of the periderm made up of cells produced inwardly by the cork... Read More

Contagious disease

Definition noun A disease in which the pathogen is transmissible from one host to another. Supplement A contagious disease... Read More

Memory T cell

Definition noun, plural: memory T cells A long-lived T cell that bears receptors for an antigen during its encounter with a... Read More

Acinetobacter lwoffii

Definition Noun A gram-negative aerobic and non-fermentative bacterium involved as a normal flora of the skin, perineum and... Read More

Transmissible disease

Definition noun A contagious disease wherein the pathogen is transmissible from one host to another. Supplement A... Read More

Enterococcus faecalis

Definition Non-motile, gram-positive, facultatively anaerobic, microbial species that normally dwells in the... Read More

Suberin

Definition noun, plural: suberins (botany) A lipophilic complex polyester biopolymer that occurs in the cell... Read More

Neisseria flavescens

Definition Noun A gram-negative saprophytic bacterium found normally in the nasopharynx, mouth and upper respiratory tracts... Read More