Question 1

A patient presents with a rash on the soles and palms, fever, and headache after a recent hiking trip in the Rocky Mountains. Which bacterial disease is most likely responsible, and what is its primary route of transmission?

Accepted Answer

Rocky Mountain spotted fever; tick bite

Question 2

Which of the following best describes the symptoms and transmission route of Legionella pneumophila infection?

Accepted Answer

High fever, cough, and general symptoms of pneumonia; respiratory route

Question 3

A 5-year-old child develops a whooping cough after exposure to a classmate with a persistent cough. Which bacterium is most likely responsible, and what is the primary route of transmission?

Accepted Answer

Bordetella pertussis; respiratory route

Question 4

A patient with a history of recent antibiotic use develops severe diarrhea and abdominal pain. Which organism is most likely responsible, and what is the typical route of transmission?

Accepted Answer

Clostridium difficile; normal gut flora or fecal/oral route

Question 5

A patient presents with a painless ulcer on the genitals that resolves after a few days, followed by a widespread rash including the palms and soles. Which disease is this clinical course most consistent with?

Accepted Answer

Syphilis

Question 6

Which of the following bacteria is most strongly associated with the development of gastric ulcers and stomach cancer?

Accepted Answer

Helicobacter pylori

Question 7

A patient develops meningitis after consuming unpasteurized dairy products. Which bacterium is most likely responsible, and what is the primary route of transmission?

Accepted Answer

Listeria monocytogenes; food borne

Question 8

A patient presents with severe muscle spasms, lockjaw, and a history of a puncture wound. Which bacterium is responsible, and what is the route of transmission?

Accepted Answer

Clostridium tetani; puncture wound

Question 9

Which of the following is the leading cause of food-borne intestinal disease in the United States and is associated with outbreaks from poultry, milk, and water?

Accepted Answer

Campylobacter

Question 10

A patient presents with a bull's eye skin lesion, fever, headache, and joint pain after a camping trip in the Northeast US. Which disease is most likely, and what is the route of transmission?

Accepted Answer

Lyme disease; hard tick bite

Question 11

A hospital patient develops pneumonia after being on a ventilator. The causative agent is a Gram-negative rod that is a common cause of nosocomial infections and is associated with blue-green pus. Which bacterium is most likely responsible?

Accepted Answer

Pseudomonas aeruginosa

Question 12

A patient presents with profuse, watery diarrhea, vomiting, and rapid dehydration after drinking untreated water while traveling. Which bacterium is most likely responsible, and what is the primary concern if left untreated?

Accepted Answer

Vibrio cholerae; loss of electrolytes and fluids leading to shock and death

Question 13

Which of the following best describes the symptoms and transmission of Mycoplasma pneumoniae infection?

Accepted Answer

Walking pneumonia; respiratory transmission

Question 14

A patient develops black necrotic pustules after handling cow carcasses. Which bacterium is responsible, and what is the most likely route of transmission?

Accepted Answer

Bacillus anthracis; spore entrance through abrasions

Question 15

A sexually active male presents with painful urination and pus discharge. If left untreated, the infection may spread to cause pelvic inflammatory disease (PID) in females. Which bacterium is most likely responsible?

Accepted Answer

Neisseria gonorrhoeae

Question 16

A patient presents with a sore throat, fever, and a grayish membrane covering the tonsils. Which bacterium is most likely responsible, and what is the route of transmission?

Accepted Answer

Corynebacterium diphtheriae; respiratory droplet transmission

Question 17

A patient develops meningitis, arthritis, and a petechial rash after close contact with an infected individual. Which bacterium is most likely responsible, and what is the route of transmission?

Accepted Answer

Neisseria meningitidis; respiratory droplet transmission

Question 18

A patient presents with a rapidly progressing skin infection characterized by necrosis and loss of tissue. Which bacterium is most likely responsible for necrotizing fasciitis?

Accepted Answer

Streptococcus pyogenes

Question 19

A patient develops severe, flaccid paralysis after eating improperly canned food. Which bacterium is responsible, and what is the route of transmission?

Accepted Answer

Clostridium botulinum; ingestion of toxin or bacilli

Question 20

A patient presents with a chronic cough, weight loss, and night sweats. Which bacterium is most likely responsible, and what is the primary route of transmission?

Accepted Answer

Mycobacterium tuberculosis; respiratory droplet transmission

Overview of Major Bacterial Diseases: Transmission, Symptoms, and Clinical Features

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