MMG 301 Diseases Exam Questions with Correct Answers Latest Update 2025/2026
Foodborne Pathogens - Answers - Staphylococcus aureus
- Salmonella enterica
- E.coli
Waterborne Pathogens - Answers - Vibrio cholerae
- Legionella pneumophila
Direct Contact Pathogens - Answers - S. aureus
- Neisseria gonorrhoeae
- Treponema pallidum
Respiratory Pathogens (human to human) - Answers - Streptococcus pyogenes
- Bordetella pertussis
- Mycobacterium tuberculosis
- Neisseria meningitidis
Vector Pathogens - Answers - Rickettsia pathogens
- Borrelia burgdorferi
- Yersinia pestis
- Clostridium tetani
What is Staphylococcus aureus? - Answers A type of bacteria that cannot survive a low pH
What are the symptoms of Staphylococcus aureus infection? - Answers Nausea, vomiting, and
diarrhea occurring 1-6 hours after ingestion.
What is the mechanism of action of Staphylococcus aureus? - Answers Grows anaerobically
and aerobically; uses enterotoxins and superantigens.
What is the antibiotic resistance status of Staphylococcus aureus? - Answers N/A
What is the disease caused by Salmonella enterica? - Answers Enterocolitis
What are the symptoms of Salmonella enterica infection? - Answers Nausea, diarrhea, vomiting
(see timeline on notes)
What is the mechanism of action of Salmonella enterica? - Answers Endotoxin and exotoxins kill
, host cells (intestinal cells)
What is the antibiotic resistance status of Salmonella enterica? - Answers N/A
What is the disease caused by Shiga toxin-producing E.coli? - Answers Shiga toxin-producing
E.coli (O157:H7)
What are the symptoms of Shiga toxin-producing E.coli infection? - Answers Diarrheal and
urinary tract infections, including bloody diarrhea; sometimes kidney failure
What is the mechanism of action of Shiga toxin-producing E.coli? - Answers AB-exotoxin and
endotoxins
What is the antibiotic resistance status of Shiga toxin-producing E.coli? - Answers N/A
Vibrio cholera (WB) - Answers Disease name: Cholera
Symptoms: severe diarrhea
Mode of transmission: fecal-contaminated water (fecal-oral route)
Mechanism of Action: enterotoxin
Treatment: electrolytes and fluid IV
What is the disease caused by Legionella pneumophila? - Answers Legionnaire's Disease
What are the symptoms of Legionnaire's Disease? - Answers Pneumonia-like symptoms
Where is Legionella pneumophila commonly found? - Answers Fresh-water, warm, stagnant
water
What is the mechanism of action of Legionella pneumophila? - Answers Biofilm production;
lives in APCs and amoebas
How is Legionella pneumophila transmitted? - Answers Aerosols of mist/steam; NO PERSON to
PERSON
What is the antibiotic resistance status of Legionella pneumophila? - Answers N/A
What are the preventative measures for Legionella pneumophila? - Answers Keep water more
than 50 degrees Celsius or 20 degrees Celsius and below; disinfect periodically
What is Staphylococcus aureus commonly associated with? - Answers Several diseases
including septicemia, endocarditis, otitis media, wound infections, acne, boils, osteomyelitis,
septic arthritis, and soft-tissue infections.
What are the mechanisms of action for Staphylococcus aureus? - Answers Varies between
Foodborne Pathogens - Answers - Staphylococcus aureus
- Salmonella enterica
- E.coli
Waterborne Pathogens - Answers - Vibrio cholerae
- Legionella pneumophila
Direct Contact Pathogens - Answers - S. aureus
- Neisseria gonorrhoeae
- Treponema pallidum
Respiratory Pathogens (human to human) - Answers - Streptococcus pyogenes
- Bordetella pertussis
- Mycobacterium tuberculosis
- Neisseria meningitidis
Vector Pathogens - Answers - Rickettsia pathogens
- Borrelia burgdorferi
- Yersinia pestis
- Clostridium tetani
What is Staphylococcus aureus? - Answers A type of bacteria that cannot survive a low pH
What are the symptoms of Staphylococcus aureus infection? - Answers Nausea, vomiting, and
diarrhea occurring 1-6 hours after ingestion.
What is the mechanism of action of Staphylococcus aureus? - Answers Grows anaerobically
and aerobically; uses enterotoxins and superantigens.
What is the antibiotic resistance status of Staphylococcus aureus? - Answers N/A
What is the disease caused by Salmonella enterica? - Answers Enterocolitis
What are the symptoms of Salmonella enterica infection? - Answers Nausea, diarrhea, vomiting
(see timeline on notes)
What is the mechanism of action of Salmonella enterica? - Answers Endotoxin and exotoxins kill
, host cells (intestinal cells)
What is the antibiotic resistance status of Salmonella enterica? - Answers N/A
What is the disease caused by Shiga toxin-producing E.coli? - Answers Shiga toxin-producing
E.coli (O157:H7)
What are the symptoms of Shiga toxin-producing E.coli infection? - Answers Diarrheal and
urinary tract infections, including bloody diarrhea; sometimes kidney failure
What is the mechanism of action of Shiga toxin-producing E.coli? - Answers AB-exotoxin and
endotoxins
What is the antibiotic resistance status of Shiga toxin-producing E.coli? - Answers N/A
Vibrio cholera (WB) - Answers Disease name: Cholera
Symptoms: severe diarrhea
Mode of transmission: fecal-contaminated water (fecal-oral route)
Mechanism of Action: enterotoxin
Treatment: electrolytes and fluid IV
What is the disease caused by Legionella pneumophila? - Answers Legionnaire's Disease
What are the symptoms of Legionnaire's Disease? - Answers Pneumonia-like symptoms
Where is Legionella pneumophila commonly found? - Answers Fresh-water, warm, stagnant
water
What is the mechanism of action of Legionella pneumophila? - Answers Biofilm production;
lives in APCs and amoebas
How is Legionella pneumophila transmitted? - Answers Aerosols of mist/steam; NO PERSON to
PERSON
What is the antibiotic resistance status of Legionella pneumophila? - Answers N/A
What are the preventative measures for Legionella pneumophila? - Answers Keep water more
than 50 degrees Celsius or 20 degrees Celsius and below; disinfect periodically
What is Staphylococcus aureus commonly associated with? - Answers Several diseases
including septicemia, endocarditis, otitis media, wound infections, acne, boils, osteomyelitis,
septic arthritis, and soft-tissue infections.
What are the mechanisms of action for Staphylococcus aureus? - Answers Varies between
