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an acquired, abnormal immune response to a substance (allergen) that does not normally cause a reaction
mutual opposition or contrary action. The inhibition of one bacterial organism by another.
glycoprotein substance developed in response to, and interacting specifically with an antigen. also known as immunoglobulin
a foreign substance that stimulates the formation of antibodies that interact specifically with it
the prevention of sepsis by preventing or inhibiting the growth of causative microorganism
dilution of weakening of virulence of a microorganism, reducing, or abolishing pathogenicity
self-nourishing bacteria that are capable of growing in the absence of organic compounds. Organisms that obtain carbon from carbon dioxide.
microscopic unicellular organisms having no nuclear membrane, devoid of chlorophyll, which reproduce by binary fission
a visible group of bacteria growing on a solid medium, presumably arising from a single microorganism
a method of asexual reproduction in bacteria in which the cell splits into two parts, each of which develops into a complete individual.
an arthropod vector in which the disease-causing organism multiplies or develops withing the arthropod prior to becoming infective for a susceptible individual
the membrane that surrounds some bacterial cells; a loose gel-like structure that, in pathogenic bacteria, helps to protect against phagocytosis
the symbiotic relationship of two organisms of different species in which one gains benefit such as protection or nourishment
a disease that may be transmitted directly or indirectly from one individual to another
a genus of bacteria that are gram-positive organisms occurring in pairs. Also called streptococcus
a chemical or physical agent that kills disease-causing microorganisms - generally used on inanimate objects
the destruction of infectious agents by chemical or physical means directly applied to an inanimate object
bacterial toxin confined within the body of a bacterium freed only when the bacterium is broken down, found only in gram-negative bacteria
a microorganism that prefers an environment devoid of oxygen but has adapted so that it can live an grow in the presence of oxygen
an organism that prefers an oxygen environment but is capable of living and growing in its absence
prefers live organic matter as a source of nutrition but can adapt to the use of dead organic matter under certain conditions
appearance of an infectious disease or condition that attacks many people at the same time in the same geographical area
a toxin produced by a microorganism and excreted into its surrounding medium, generally protein in nature
having the cpacity to do something athat is not compulsory, in particular having the ability to live or adapt to certain conditions
one in which the organism are originally confine to one area but enter teh blood or lymph vessel and spread to other parts of the body
fungus (pl. fungi)
a group of diverse and widespread unicellular and multicelluar organisms, lacking chlorophyll usually bearing spores and often filamentous
organisms that require complex organic food from a carbon source in order to grow and develop
an acquired, abnormal immune response to a substance that does not normally cause a reaction
the state or condition in which the body or a part of it is invaded by a pathogenic agent that, under favorable conditions, multiplies and produces injurious effects
a compound consisting of iodine combined with a carrier, such as polyvinylpyrrolidone, often used as a preoperative skin disinfectant
infection caused by germs lodging and multiplying at one point in a tissue and remaining there
a living organism or an object that is capable of transmitting infections by carrying a disease agent on it external body parts or surface
bacteria that prefers moderate temperature and develops best at temperatures between 25 C and 40 C
a relationship in which organisms of two different species live in close association, to the mutual benefit of each
bacteria of the mycoplasma genus that are found in humans, most having no cell wall; the smallest free living organisms presently known, being intermediate in size between viruses and bacteria
an organism that exist as part of the normal flora but may become pathogenic under certain conditions
a disease affecting the majority of the population of a large region or one that is epidemic at the same time to may different parts of the world
an interactive relationship between two organisms in which one is harmed and the other benefits
small proteinaceous infectious agents (particles) which almost certainly do not have a nucleic acid genome and therefore resist inactivation by procedures that modify nucleic acids. Prion disease are often called spongiform encepholopathies
infection caused by a different organism that the one causing the primary infection
Spirillum (pl. Spirilla)
a genus of spiral bacteria having a corkscrew shape with a rigid cell wall and hair-like projections called flagella that assist in movement
a genus of bacteria having a flexible cell wall but no flagella in the traditional sense. movement i these organisms occurs by contractions (undulating) of long filaments (endoflagella) that run the length of the cell
genus of gram-positive nonmotile, opportunistic bacteria which tend to aggregate in irregular grape-like clusters
process of completely removing or destroying all life forms or their products on or in a substance
the harmonious action of two microorganism producing an effect that neither could produce alone
blood distribution throughout the body of poisonous product of bacteria growing in a focal or local site, thous producing generalized symptoms
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