Infectious Disease Flashcards
Pathogenic
Disease causing
Virulence
degree or intensity of pathogenicity
Pathogens ability to cause disease
Infection
Parasitic microorganisms increase in number within or on the body of the host
Bacteria
Cocci, bacilli, spirochetes
Gram positive, gram negative
Encapsulated, non encapsulated
Aerobic, nonaerobic
Endotoxin, exotoxin
Mycoplasmas
Atypical bacterium, no cell wall
Rickettsia
Intracellular gram negative bacteria found in ticks, fleas, lice, mites
Protozoan
Single celled organism
Viruses
Multiplies only within living cells of a host, RNA or DNA virus
Prions
Transmitted from animals to human contains proteins without nucleic acids
Antibiotic resistant organisms
Methicillin- resistant staphylococcus aureus (MRSA)
Vancomycin- resistant enterococci
Multidrug resistant tuberculosis TB
Hypervirulent clostridium difficile
Mode of entry
Ingestion, inhalation, transplacental, injection
Portal of exit
G.I. T, genitourinary tract, open lesion
First line of defense
Intact skin mucous membranes respiratory Celia, cough reflex is normal flora of the skin mouth, G.I. tract
Second line of defense
Inflammatory process, nonspecific
Third line of defense
Immune response, specific immunity