Microbiology Test 3: Chapter 19
It is found on the skin, upper respiratory, GI, and urogenital tracts
It is more virulent because of production of enzymes and toxins.
It causes actinomycosis which is characterized by the formation of many abscesses connected by channels in the skin or mucous membranes.
Group A Streptococcus
Produces protein M and hyaluronic acid which contributes to virulence. Enzymes and toxins produced dissolve blood clots, stimulate fever, and lyse blood cells.
Inhabit the mouth, pharynx, GI and genitourinary tracts, can cause cavities, and can enter blood to cause bacteremia and meningitis.
Virulent Strains of Streptococcus Pneumoniae
Protected by polysaccharide capsules and phosphorylcholine in their cell walls.
Normal microbiota of the intestine that can cause bacteremia, endocarditis, and wound infections.
Secretes anthrax toxin. Anthrax can be found in GI which is rare and fatal, cutaneous which is fatal if untreated, or inhaled which is often fatal.
Rarely pathogenic but it can cause severe disease in pregnant women, newborns, the elderly, and immunocompromised patients.
Transmitted by respiratory droplets which could cause diphtheria.
Produces 11 toxins that lyse blood cells causing food poisoning and gas gangrene.
Can release poisonous toxin in canned food. It can also cause infant botulism in the GI tract.
Enters though broken skin
Cell wall component called cord factor causes tuberculosis where bacteria replicate within macrophages
Progressive destruction of body structures.