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MMG 301 MSU final exam Questions with
Correct Answers | Updated (100% Correct
Answers)
Indoor Microbes Answer: Respritory tract- aerosols/droplet
Outdoor Microbes Answer: Soil, dust particles
Air sensitivity Answer: Enveloped viruses dry out, gram + more
resistant to drying, gram - dry out more, spores survive in the air
well
Ro Answer: # of people that one person can infect
Streptococcus Pharyngitis Answer: Streptococcus pyogenes/ Group
A strep (GAS)
Gram pos cocci - long chains
ROTM: asymptomatic carriers
Upper respiratory
Virulence: exotoxin SUPERANTIGEN
ID: Beta-hemolysis toxins
Presents: swelling, white plaques/abscesses, red spots, highly
common (1/2 of sore throats)
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Scarlet Fever Answer: Streptococcus pyogenes/ Group A strep (GAS)
Gram pos cocci- long chains
STREP THROAT SEQUELA
ROTM: Untreated strep throat of certain strains that have a phage
Virulence: erythrogenic exotoxin (SUPERANITGEN)
ID: Beta-hemolysis toxins
Presents: strawberry tongue, toxin causes red spotty rash
Rheumatic Fever Answer: Streptococcus pyogenes/ Group A strep
(GAS)
Gram pos cocci- long chains
STREP THROAT SEQUELA
ROTM: Untreated strep throat 2-4 weeks after strep infection
SUPERANTIGEN
Virulence: surface antigen resembles human antigen of heart and
kidneys (M protein), attacks self
Presents: rheumatic heart damage, heart valve issues, kidney failure
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Invasive Infections/ Necrotizing Fasciitis Answer: Streptococcus
pyogenes/ Group A strep (GAS)
Gram pos cocci- long chains
"Flesh Eating Bacteria"
ROTM: deep tissue infection
Virulence: exotoxin SUPERANTIGEN leading to tissue destruction
Presents: decaying flesh, rash, deep wounds
Beta-hemolytic Strep Pathogens Answer: Characterized by
Lancefield Antigen (LFA)
Group A strep (GAS)= Streptococcus pyogenes
(Strep throat, scarlet and rheumatic fever, necrotizing fasciitis)
Group B strep (GBS)= Streptococcus agalactiae
(Newborn infections, mothers can be asymptomatic)
Groups C,D,F,G,H = rare
Pneumonia/ Meningitis Answer: Streptococcus pneumoniae
Gram pos cocci - No LFA - Capsule producing
ROTM: nose and throat
© 2025 All rights reserved
MMG 301 MSU final exam Questions with
Correct Answers | Updated (100% Correct
Answers)
Indoor Microbes Answer: Respritory tract- aerosols/droplet
Outdoor Microbes Answer: Soil, dust particles
Air sensitivity Answer: Enveloped viruses dry out, gram + more
resistant to drying, gram - dry out more, spores survive in the air
well
Ro Answer: # of people that one person can infect
Streptococcus Pharyngitis Answer: Streptococcus pyogenes/ Group
A strep (GAS)
Gram pos cocci - long chains
ROTM: asymptomatic carriers
Upper respiratory
Virulence: exotoxin SUPERANTIGEN
ID: Beta-hemolysis toxins
Presents: swelling, white plaques/abscesses, red spots, highly
common (1/2 of sore throats)
© 2025 All rights reserved
,2
Scarlet Fever Answer: Streptococcus pyogenes/ Group A strep (GAS)
Gram pos cocci- long chains
STREP THROAT SEQUELA
ROTM: Untreated strep throat of certain strains that have a phage
Virulence: erythrogenic exotoxin (SUPERANITGEN)
ID: Beta-hemolysis toxins
Presents: strawberry tongue, toxin causes red spotty rash
Rheumatic Fever Answer: Streptococcus pyogenes/ Group A strep
(GAS)
Gram pos cocci- long chains
STREP THROAT SEQUELA
ROTM: Untreated strep throat 2-4 weeks after strep infection
SUPERANTIGEN
Virulence: surface antigen resembles human antigen of heart and
kidneys (M protein), attacks self
Presents: rheumatic heart damage, heart valve issues, kidney failure
© 2025 All rights reserved
, 3
Invasive Infections/ Necrotizing Fasciitis Answer: Streptococcus
pyogenes/ Group A strep (GAS)
Gram pos cocci- long chains
"Flesh Eating Bacteria"
ROTM: deep tissue infection
Virulence: exotoxin SUPERANTIGEN leading to tissue destruction
Presents: decaying flesh, rash, deep wounds
Beta-hemolytic Strep Pathogens Answer: Characterized by
Lancefield Antigen (LFA)
Group A strep (GAS)= Streptococcus pyogenes
(Strep throat, scarlet and rheumatic fever, necrotizing fasciitis)
Group B strep (GBS)= Streptococcus agalactiae
(Newborn infections, mothers can be asymptomatic)
Groups C,D,F,G,H = rare
Pneumonia/ Meningitis Answer: Streptococcus pneumoniae
Gram pos cocci - No LFA - Capsule producing
ROTM: nose and throat
© 2025 All rights reserved
