Exam 2 Flashcards
(104 cards)
Asepsis
sterile
Incubation
period before symptoms
Prodromal
Period before onset of illness; vague symptoms
Clinical illness
symptoms present; illness diagnosed
convalescence
period after illness until feeling normal
infectious disease
term used to describe illness by a pathogen
spread of infection caused by:
world travel; natural disasters; nosocomial; iatrogenic; healthcare institutions (create drug-resistant bacteria); immunosuppressant therapies
primary defense from infection
systems (GI, skin, mucous membranes, etc)
Secondary defenses from infection
immune (specific to antigen/foreign substance) and inflammatory (local) responses
Cell mediated immunity
immune response; T & B cells
3 types of cells in cell-mediated immunity:
Helper T: help B recognize antigen; Suppressor T: prevent rxn to antigen to avoid hypersensitivity; Nat’l Killer T: kill infected cells
Humoral immunity
immune response: antibodies (proteins) that recognize and destroy invaders; created on initial contact by B cells; 5 antibodies
5 antibodies of humoral immunity:
IgM (first to form); IgG (slow to respond but will last for years); IgA (blood, saliva, tears); IgD (serum, role not identified); IgE (environmental; releases histamine)
Active Immunity
immune response; long term acquired immunity; protects from new infxn
Passive immunity
immune response; acquired; from antibodies of placenta, colostrum, or injection/prophylaxis
Natural immunity
immune response; achieved when infected by organism/pathogen
artificial immunity
immune response; vaccines
acquired immunity
immune response; not innate, obtained during life; active/passive
virulence
power of organism to cause disease/ability to survive outside cell; invasiveness; toxigenicity
virus
only replicates in cells of host; packet of genetic material covered in protein coat
bacterium
single cells; can grow outside organism
fungi
eukaryotic; can replicate very rapidly; chitin; hard to destory
parasites
organism lives inside another living creature and takes advantage
order of vital signs
T-P-R-BP