any change, other than an injury, that disrupts the normal functions of the body
germ theory of disease
conclusion that infectious diseases were caused by microorganisms of different types, commonly called germs
a series of rules that identify the microorganism that causes a specific disease
animals that carry pathogens from person to person
compounds that kill bacteria without harming the cells of human or animal hosts
the process in which the infection is fought off through the production of cells that inactivate foreign substances or cells
a nonspecific defense reaction to tissue damage caused by injury or infection
an elevated increase in body temperature
a group of proteins that helps the cell resist viral infection
specific defenses carried out by the immune system if a pathogen is able to get past the body's nonspecific defenses
a substance that triggers the immune response
when B cells provide immunity against antigens and pathogens
when T cells provide a defense against abnormal cells abd pathogens inside living cells
proteins that recognize and bind to antigens
the injection of a weakened form of a pathogen to produce immunity
the type of immunity produced by the body's reaction to a vaccine
when antibodies produced by other animals against a pathogen are injected into the bloodstream
the most common overreactions of the immune system to antigens
chemical that increase the flow of blood and fluids to surrounding areas
a chronic respiratory disease in which the air passages become narrower than normal
anything that increase the chance of disease or injury
when a single cell or a group of cells begin to grow and divide uncontrollably resulting in a mass of growing tissue
chemical compounds that are known to cause cancer
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