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Antigen

Any substance that is capable of eliciting an immune response; a molecule that causes…

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Antigenic chemicals

Chemical contact sensitizers that can elevate the level of sensitization to that specific chemical…

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Antigenic drift

Refers to small, gradual, random point mutations in the genetic material responsible for the…

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Antigenic shift (reassortment)

Antigenic shift refers to an abrupt, major change to produce a novel influenza A…

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Alveolar sac

The terminal portion of an air passageway within the lung. Its wall is made…

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Alveolar ventilation (Va)

Alveolar ventilation (Va or VA) is the volume of air breathed in per minute…

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Alveolar-arterial oxygen tension gradient

The difference between the partial pressure of oxygen in the alveoli and that in…

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Alveolar-capillary membrane

The structures and substances through which gases must pass as they diffuse from air…

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Ambu-bag

A device used by the clinician to manually ventilate a patient. Also referred to…

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American Association of Textile Chemists and Colorists (AATCC)

A not-for-profit association that provides test method development, quality control materials, and professional networking…

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Amoebic dysentery

A diarrheal disease characterized by frequent, watery stools that often contain blood and mucus;…

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AMP

Adenosine Monophosphate

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