Infection with Giardia lamblia is associated with explosive diarrhea.  Which of the following is the most common means of transmission of the etiological agent?

A 16-year-old boy who lives in rural Connecticut comes to a physician’s office in July.  He is febrile, has localized lymphadenopathy, and has a headache and malaise.  A large circular erythematous (red) rash surrounding a central papule is observed. He reports that the rash is enlarging.  Which of the following is the most likely disease to be considered for this patient?

In Africa, a disease is prevalent that affects the central nervous system.  It is called sleeping sickness and it is transmitted by the tsetse fly.  Which of the following parasites is responsible for this disease?

Which of the following viruses is highly contagious via aerosol droplets, infects and kills epithelial cells of the upper respiratory tract, and attaches to target cells via a hemagglutinin?

Which of the following bacteria are most responsible for gastritis and peptic ulcers?

A  woman is brought to the hospital after experiencing hallucinations.  History reveals that she lives on a communal farm and eats primarily whole grains and naturally grown and homemade canned foods.  It was concluded that her symptoms result from ergot alkaloids and lysergic acid diethylamide.  Which of the following is the most likely scenario for her symptoms? 

Fungal infections can be cutaneous, subcutaneous and systemic.  Which of the following is an example of a subcutaneous mycosis?  

Solve the exponential equation. Round final answers to two decimal places. You MUST show EVERY step to get credit!        

What are healthcare-acquired infections (HAIs)?

What does the term virulence in reference to microorganisms?