NEET PG High-Yield Questions on Parasitology

There is no denying that Parasitology is one of the most crucial topics to ace the NEET PG exam. This topic’s relevance extends far beyond the academic realm into practical clinical diagnosis and treatment.

For all the aspirants preparing for NEET PG or even FMGE, a thorough understanding of parasitology is important as the questions from this topic are frequently asked in exams.

In this blog, we have curated high-yield multiple-choice questions from parasitology. These questions will help you sharpen your knowledge and test-taking skills. Designed to mirror the exams and cover essential topics, all these mentioned questions will strengthen your conceptual clarity and boost your confidence in the exam.

MCQs in Parasitology

Q. Diagnostic test for amoebic hepatitis

A. Cysts in sterile pus

B. Trophozoites in the pus

C. CYst in the intestine

D. Trophozoites in the feces

Ans. Trophozoites in the pus

Q. Number of nuclei in mature cyst of Entamoeba coli?

A. 1

B. 2

C. 4

D. 8

Ans. 8

Q. What is the composition of amoebic chromatoidal bars?

A. Ribonucleoprotein

B. Glycogen

C. Glycoprotein

D. Lipoprotein

Ans. Ribonucleoprotein (RNP)

Also read: Understanding Microbial Staining and Sterilization Methods

Q. The single characteristic feature that is most diagnostic in differentiating Entamoeba histolytica from the other intestinal amoebae is the?

A. Size of the cyst

B. Structure of the nucleus

C. Presence of chromatoid bodies

D. Number of nuclei

Ans. Structure of the nucleus

Q. A patient with contact lenses developed corneal ulcers and symptoms of conjunctivitis. Saline Mount preparation of corneal scraping shows double walled cyst with irregular outer wall and smooth inner wall. Probable diagnosis?

A. Acanthamoeba

B. Naegleria

C. Entamoeba

D. Giardia

Ans. Acanthamoeba

Q. A 15-year-old girl residing in a village recently returned from a vacation visiting her friends in another village. She complained of severe headache and fever and was diagnosed as a case of pyogenic meningitis and admitted to the hospital. She died 5 days later. Which of the following organisms should be considered in the diagnosis?

A. Entamoeba histolytica

B. Naegleria fowleri

C. Toxoplasma gondii

D. Falciparum malaria

Ans. Naegleria fowleri

Q. All are true about B.coli except?

A. It is a protozoa.

B. Cyst is the infective stage.

C. Usually invades the liver.

D. It is the largest protozoan parasite inhabiting the large intestine in a man.

Ans. Usually invades the liver

Q. There is no change in the number of nuclei of cyst and of trophozoite of?

A. Balantidium coli

B. Entamoeba coli

C. Entamoeba histolytica

D. Giardia lamblia

Ans. Balantidium coli

Also read:Transplant Immunology

Q. Which of the following statements is true about Trichomonas?

A. It has 5 flagella at the posterior end

B. Cysts form is infective

C. Has a sucking disc for attachment

D. Survives well in hot and cold water

Ans. Survives well in hot and cold water

Q. Trypanosoma cruzi initially penetrated through the mucosa and then multiplied in a lesion called a chagoma. In the chronic stage of this disease, where are the main lesions often observed?

a. GIT and Respiratory

b. Heart and GIT

c. Heart and liver

d. Spleen and pancreas

Ans. Heart and GIT

Q. NNN medium is used for isolation of

1. Leishmania donovani

2. Giardia

3. Trichomonas

4. Trypanosoma cruzi

5. Trypanosoma brucei

A. 1,2,3

B. 1,4,5

C. 2,3,5

D. 1,4

Ans. 1,4

Q. Romana sign is seen in:

A. Chagas disease

B. Sleeping sickness

C. Kala azar

D. Fasciola

Ans. Chagas disease

Q. In Chagas disease, which stage is found in the muscle tissue?

A. Amastigote

B. Promastigote

C. Epimastigote

D. Trypomastigote

Ans. Amastigote

Also read: Myxoviruses: Structure, Function, and Impact on Health

Q. Tsetse fly is a vector for:

A. Japanese encephalitis

B. Chagas disease

C. Dengue fever

D. Sleeping sickness

Ans. Sleeping sickness

Q. Winterbottom sign is seen in:

A. Toxocariasis

B. Leishmaniasis

C. African trypanosomiasis

D. Toxoplasmosis

Ans. African trypanosomiasis

Q. An HIV-positive person presented with diarrhoea. Stool examination revealed round acid fast cyst with 8–12 microns in diameter; the diagnosis is?

A. E coli

B. E Histolytica

C. Cryptosporidium

D. Cyclospora

Ans. Cyclospora

Q. Parasitophorous vacuole is suggestive of?

A. Cryptosporidium

B. Isospora

C. Cyclospora

D. Giardia

Ans. Cryptosporidium

Q. The life cycle shown below best describes which of the following pathogens?

A. Cryptosporidium

B. Isospora

C. Cyclospora

D. Giardia

Ans. Cryptosporidium

Also read: Sexually Transmitted Diseases: Types and Symptoms

Q. A person who has recently consumed a box of raspberries came down with severe watery diarrhea. What is the most likely diagnosis?

A. Cyclospora

B. Cryptosporidium

C. Isospora

D. Vibrio

Ans. Cyclospora

Q. Sabin Feldman test used for?

A. Leishmania

B. Malaria

C. Toxoplasma

D. Trypanosoma

Ans. Toxoplasma

Q. Which of the following is not a Coccidean?

A. Cyclospora

B. Isospora

C. Cryptosporidium

D. Entamoeba coli

Ans. Entamoeba coli.

Q. 22-year-old male patient with fever and chills. His blood counts show HB12gm/dl, TLC 13000/mm3, and DLC 50/L29/M20/E1. Peripheral smear examination shows a presence of RBCs and pressure of applique forms. Few of the RBCs show the presence of the band. What would be your diagnosis?

A. P. falciparum

B. P. Vivax

C. P. malariae

D. Mixed infection

Ans. Mixed infection

Also read: Picornaviridae: Family Groups, Causes and Diagnosis

Q. What is the diagnosis?

A. Positive for plasmodium falciparum

B. Positive for plasmodium Vivax

C. Positive for no falciparum malaria

D. Mixed infection

E. A and D

Ans. A and D

Q. Which of the following is an incorrect antibody detection test for the diagnosis of Plasmodium falciparum?

A. It is based on the principle of ICT

B. Detects aldolase antigen

C. Detects LDH antigen

D. Detects HRP1 antigen

Ans. Detects HRP1 antigen

Q. Which of the following is not a cestode?

A. Diphyllobothrium latum

B. Tenia saginata

C. Schistosoma mansoni

D. Echinococcus granulosus

Ans. Schistosoma mansoni

Q. Which of the following has grooves on its scolex for attachment in the definitive host

A. Diphyllobothrium latum

B. Tenia saginata

C. Schistosoma mansoni

D. Echinococcus granulosus

Ans. Diphyllobothrium latum

Q. Infective form of diphyllobothrium is

A. Proceroid larva

B. Plerocercoid larva

C. Metacercaria

D. Cysticercus

Ans. Plerocercoid larva

Also read: Ancylostoma: Causes, Stages, Diagnosis and Treatment

Q. Arc - 5 countercurrent electrophoresis test on serum is diagnosis of

A. Cysticercus bovis

B. Cysticercus cellulosae

C. Hydatid cyst

D. Cysticercoid

Ans. Hydatid cyst

Q. The larva form of which of the following cestodes is not seen in man.

A. Tenia multiceps

B. Echinococcus granulosus

C. Tenia saginata

D. Tenia solium

Ans. Tenia saginata

Q. Which of the following have separate sexes?

A. Fasciola

B. Taenia

C. Schistosoma

D. Paragonimus

Ans. Schistosoma

Q. Operculated eggs are not produced in?

A. Paragonimus westermani

B. Clonorchis sinensis

C. Schistosoma haematobium

D. Diphyllobothrium latum

Ans. Schistosoma haematobium

Q. The infective form of man in case of Schistosoma infection is?

A. Metacercaria

B. Cercaria

C. Coracidium

D. Operculated egg

Ans. Cercaria

Also read: Ringworm: Causes, Types, Symptoms and Treatment

Q. Radiae are not present in the life cycle of?

A. Paragonimus

B. Clonorchis sinensis

C. Schistosoma mansoni

D. Opisthorchis viverrini

Ans. Schistosoma mansoni

Q. Which of the following localizes in veins draining the ileocaecal region?

A. Schistosoma japonicum

B. Schistosoma mansoni

C. Schistosoma haematobium

D. Fasciola hepatica

Ans. Schistosoma japonicum

Q. CNS schistosomiasis is most often seen with?

A. Schistosoma haematobium

B. Schistosoma mansoni

C. Schistosoma japonicum

D. Schistosoma intercalatum

Ans. Schistosoma japonicum

Q. Terminal spine eggs are seen in?

A. Schistosoma haematobium

B. Schistosoma japonicum

C. Schistosoma mansoni

D. Clonorchis sinensis

Ans. Schistosoma haematobium

Also read: Tuberculosis: Symptoms, Causes, Types and Complications

Q. A man a few months after returning from a trip to Malaysia complains of pain abdomen, jaundice with raised enzymes and hyperbilirubinemia. USG shows biliary tree blockade. What is the likely cause?

A. Fasciolopsis buski

B. Strongyloides

C. Clonorchis

D. Gnathostoma

Ans. Clonorchis

Q. A 35 year old man presents to the OPD with a productive sputum since 5 days. Sputum for AFB is negative. He gives a history of recent visits to China and ingestion of crab pickle over there. What is the likely diagnosis?

A. Clonorchiasis

B. Diphyllobothriasis

C. Paragonimiasis

D. Fascioliasis

Ans. Paragonimiasis

Q. The 2 pairs of ventral teeth are found in the buccal capsule of?

A. Ancylostoma duodenale

B. Necator americanus

C. Capillaria philippinensis

D. Ascaris lumbricoides

Ans. Ancylostoma duodenale

Q. Hookworm and Strongyloides infection are usually acquired through?

A. Bite of the adult

B. Ingestion of contaminated food

C. Contact of skin with infected soil

D. None of the above

Ans. Contact of skin with infected soil

Also read: Anthrax: Causes, Symptoms, Treatment and Complications

Important Questions on Parasitology

Q. How does Giardia lamblia attach to the duodenum?

Ans. By sucking disc/sucking disc, Lectin antigen Trophozoite will divide. And after attachment to the duodenum of the intestine, it will cause the blunting of the villi, and iron deficiency anemia will be there. Because Duodenum is affected and iron will not be absorbed The patient will also get disaccharidase enzyme deficiency, because disaccharidase is not absorbed, the patient will get classical malabsorption because fat, B12, folic acid deficiency, and protein deficiency also follow.

The hallmark of malabsorption is that the fat which does not get absorbed Steatorrhea Giardia lamblia leads to fatty diarrhea. Stool sample will have cyst (can survive in the environment) and trophozoite

Q. What type of Toxoplasma gondii transfer via organ transplant?

Ans. Bradyzoite, since they are tissues.

Q. Tail tip contains nuclei in case of microfilariae of?

Ans. Brugia Malayi

Also read: Pinworm Infection: Causes, Symptoms, Treatment & Prevention

Previous Year Questions on Parasitology

Q. Patient presented with colicky pain and diarrhea. No history of fever & stool sample is given for investigation & showed in the image diagnosis?

A. E. Coli

B. E. Histolytica

C. Giardia Lamblia

D. Shigella

Ans. E. Histolytica

Q. Identify the image below?

A. Trichomonas

B. Plasmodium falciparum

C. Entamoeba histolytica

D. Giardia lamblia

Ans. Trichomonas

Q. Cyst are parasite seen in stool microscopy. What is the organism?

A. Entamoeba Dispar

B. Balantidium Coli

C. Giardia Lamblia

D. Taenia Solium

Ans. Giardia Lamblia

Also read: Norovirus Infection: Causes, Symptoms, Diagnosis & Treatment

Q. A post-renal transplant patient on immunosuppressants complains of chronic diarrhoea. Stool examination reveals a cyst of 4-6 microns in size. Positive on Kinyoun staining, which of the following statements is true regarding the causative agent of this clinical condition?

A. MC cause is Cryptosporidium

B. Oocyst becomes ineffective immediately after coming out in stools

C. These are obligate intracellular organisms

D. Autoinfection is seen with them

Ans. MC cause is Cryptosporidium

Q. A known HIV patient on anti-retroviral therapy presented with diarrhoea of six months duration. Stool microscopy was done in which 10–30 micrometre cysts were seen. Kinyoun Stain was positive. What is most likely? Diagnosis?

A. Cystoisospora

B. Cryptosporidium

C. Balantidium Coli

D. Strongyloides

Ans. Cystoisospora

Q. Identify organisms based on peripheral smear findings given below?

A. Plasmodium vivax

B. Plasmodium falciparum

C. Babesia

D. Plasmodium ovale

Ans. Plasmodium vivax

Also read: Valley Fever: Causes, Symptoms, Diagnosis & Treatment

Q. Banana shaped gametocytes are typically formed by:

A. Plasmodium vivax

B. Plasmodium ovale

C. Plasmodium malariae

D. Plasmodium falciparum

Ans. Plasmodium falciparum

Q. Malaria relapse common with which type of plasmodium species?

A. Plasmodium malariae & vivax

B. Plasmodium falciparum & vivax

C. Plasmodium vivax & ovale

D. Plasmodium ovale & malariae

Ans. Plasmodium vivax & ovale

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