Q: Which of the following equations best represents the calculation of parasite load in a stool sample, given the number of eggs counted per gram?

$$\text{Parasite Load} = \frac{\text{Number of eggs counted}}{\text{Weight of stool sample (g)}}$$

Question 1

Which of the following protozoa is classified as an amoeba and is known to cause primary amoebic meningoencephalitis in humans?

Accepted Answer

Naegleria fowleri

Question 2

A patient presents with fever, chills, and anemia after traveling to a malaria-endemic region. Which organism is most likely responsible for these symptoms?

Accepted Answer

Plasmodium falciparum

Question 3

Which helminth is transmitted by ingestion of undercooked pork and can cause neurocysticercosis?

Accepted Answer

Taenia solium

Question 4

A child presents with abdominal pain, nausea, and vomiting. Microscopic examination of stool reveals eggs. Which nematode is most likely responsible?

Accepted Answer

Ascaris lumbricoides

Question 5

Which of the following fungi is an opportunistic pathogen that can cause oral thrush in immunocompromised patients?

Accepted Answer

Candida albicans

Question 6

A patient develops severe diarrhea after drinking contaminated water. Which protozoan is most likely responsible for this infection?

Accepted Answer

Giardia intestinalis

Question 7

Which helminth is associated with swelling of lymphatic vessels and can lead to elephantiasis?

Accepted Answer

Wuchereria bancrofti

Question 8

A patient presents with a dry cough, fever, and chest pain after inhaling fungal spores from soil. Which fungus is most likely responsible for these symptoms?

Accepted Answer

Coccidioides immitis

Question 9

Which of the following is the correct method for diagnosing schistosomiasis in a patient?

Accepted Answer

Microscopic identification of spiny eggs in stool samples

Question 10

A patient with a history of swimming in freshwater presents with abdominal pain and hepatosplenomegaly. Which parasite is most likely responsible?

Accepted Answer

Schistosoma japonicum

Question 11

Which protozoan is transmitted by the tsetse fly and causes African sleeping sickness?

Accepted Answer

Trypanosoma brucei gambiense

Question 12

A patient presents with hair loss, scaling, and inflammation of the scalp. Which dermatophyte is most likely responsible?

Accepted Answer

Trichophyton tonsurans

Question 13

Which nematode is known as the hookworm and can cause anemia due to blood loss in the host?

Accepted Answer

Necator americanus

Question 14

A patient presents with fever, muscle pain, and weight loss after exposure to contaminated water. Which apicomplexan is most likely responsible?

Accepted Answer

Cryptosporidium parvum

Question 15

Which of the following is a common sign of neurocysticercosis caused by Taenia solium?

Accepted Answer

Encephalitis and increased intracranial pressure

Question 16

Which fungus is associated with severe allergic reactions in patients with asthma or cystic fibrosis?

Accepted Answer

Aspergillus fumigatus

Question 17

A patient presents with abdominal pain, weight loss, and eosinophilia after eating raw vegetables. Which nematode is most likely responsible?

Accepted Answer

Ascaris lumbricoides

Question 18

Which of the following is a common method for diagnosing fungal infections of the scalp?

Accepted Answer

Microscopy with KOH prep

Question 19

A patient presents with fever, cough, and chest pain after exposure to bird droppings. Which fungus is most likely responsible?

Accepted Answer

Histoplasma capsulatum

Question 20

Which of the following equations best represents the calculation of parasite load in a stool sample, given the number of eggs counted per gram?

Accepted Answer

$$	ext{Parasite Load} = \frac{	ext{Number of eggs counted}}{	ext{Weight of stool sample (g)}}$$

Pathogenic Protozoa, Helminths, and Fungi: Classification, Pathology, and Diagnosis

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