Question 1

A patient presents with red, raised, ring-like lesions on their trunk. The lesions are itchy and have a clear center. Which of the following is the most likely causative agent?

Accepted Answer

Trichophyton rubrum

Question 2

A 35-year-old man develops a severe headache, fever, and neck stiffness after cleaning out a pigeon coop. Laboratory analysis reveals a fungal infection of the central nervous system. Which organism is most likely responsible?

Accepted Answer

Cryptococcus neoformans

Question 3

Which of the following diseases is transmitted by the bite of a tsetse fly and primarily affects the central nervous system?

Accepted Answer

African sleeping sickness

Question 4

A child returns from swimming in a warm freshwater lake and develops a rapidly progressing, fatal brain infection. Which organism is most likely responsible?

Accepted Answer

Naegleria fowleri

Question 5

A patient presents with fever, chills, and anemia after returning from a trip to a tropical region. Blood smear reveals ring-shaped parasites inside red blood cells. Which of the following is the most likely causative agent?

Accepted Answer

Plasmodium species

Question 6

Which of the following diseases is most likely to be acquired by walking barefoot on contaminated soil and is characterized by raised lesions between the toes?

Accepted Answer

Tinea pedis

Question 7

A woman develops a persistent, frothy vaginal discharge and discomfort during urination. Which organism is most likely responsible for her symptoms?

Accepted Answer

Trichomonas vaginalis

Question 8

A patient presents with a chronic cough and chest pain after a trip to the southwestern United States. Imaging shows lung nodules, and laboratory tests confirm a fungal infection. Which organism is most likely responsible?

Accepted Answer

Coccidioides immitis

Question 9

A patient develops watery diarrhea after drinking from a stream while hiking. Which protozoan parasite is most likely responsible for this infection?

Accepted Answer

Giardia duodenalis

Question 10

Which of the following diseases is caused by a mite that burrows into the skin, leading to intense itching and a rash?

Accepted Answer

Scabies

Question 11

A patient presents with chronic heart and digestive problems years after being bitten by a 'kissing bug' in South America. Which parasite is most likely responsible?

Accepted Answer

Trypanosoma cruzi

Question 12

A person develops a severe lung infection after inhaling spores from soil contaminated with bird or bat droppings. Which organism is most likely responsible?

Accepted Answer

Histoplasma capsulatum

Question 13

A patient with AIDS develops a severe pneumonia. Microscopy reveals cysts in the lung tissue. Which organism is most likely responsible?

Accepted Answer

Pneumocystis jirovecii

Question 14

A child develops a persistent, itchy rash after playing with a stray dog. The rash is found on the trunk and arms. Which of the following is the most likely diagnosis?

Accepted Answer

Tinea corporis

Question 15

A patient presents with dark, wart-like lesions on the lower leg after being pricked by a thorn while gardening. Which organism is most likely responsible?

Accepted Answer

Dematiaceous fungi

Question 16

A person develops abdominal pain and bloody diarrhea after drinking contaminated water in a developing country. Which protozoan is most likely responsible?

Accepted Answer

Entamoeba histolytica

Question 17

A patient develops a severe, itchy rash after swimming in a freshwater lake in Africa. Laboratory tests reveal the presence of parasitic eggs in the urine. Which organism is most likely responsible?

Accepted Answer

Schistosoma

Question 18

A pregnant woman is advised to avoid cleaning cat litter boxes to prevent infection by which of the following organisms, which can cause neurological damage to the fetus?

Accepted Answer

Toxoplasma gondii

Question 19

A patient presents with watery diarrhea after visiting a water park. The infection is most likely caused by which of the following organisms?

Accepted Answer

Cryptosporidium

Question 20

A patient develops a fungal infection after inhaling spores while hiking in the Midwest United States. The infection spreads from the lungs to the skin and bones. Which organism is most likely responsible?

Accepted Answer

Blastomyces dermatitidis

Study Guide: Fungal and Parasitic Diseases Affecting Humans

Study Guide - Practice Questions

Study Guide - Flashcards