Dr. Man Sokchea (Parasitology)

75 Questions | By Nexi_byun | Updated: Jan 23, 2023 | Attempts: 204

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1.

The roundworms constitute an unusual group of organisms in the phylum Nematoda, in that they all live a part of their lives as intracellular parasites.
- A.
  
  Ancylostoma duodenale
- B.
  
  Strongyloides sterocoralis
- C.
  
  Trichinella species
- D.
  
  Capillaria species
2.

Trichuris species have a direct life cycle, and mature in a single host. The host becomes infected when it:
- A.
  
  Penetrates thru the skin.
- B.
  
  Ingests embryonated eggs from the environment.
- C.
  
  Inhales the sporocyst.
- D.
  
  Breasts the baby.
3.

Trichuriasis is caused by various species of Trichuris, nematode parasites in the family Trichuridae. These parasites are also known as whipworms. Both larval and adult whipworms are normally found:
- A.
  
  Only in the intestines.
- B.
  
  In the intestine.
- C.
  
  In the liver parenchyma.
- D.
  
  In the gallbladder.
4.

The larvae hatch in the digestive tract, migrate into the mucosa, and return to the intestinal lumen. There the adult stages develop and remain with their slender anterior ends anchored in the mucosa.
- A.
  
  S. stercoralis
- B.
  
  Capillaria species
- C.
  
  E. vermicularis
- D.
  
  T. trichiura
5.

Parasite buries a thin, threadlike anterior half into the intestinal mucosa and feeds on tissue secretion.
- A.
  
  S. stercoralis
- B.
  
  Capillaria species
- C.
  
  E. vermicularis
- D.
  
  T. triciura
6.

These histological findings were typical of acute disease. he patient recovered well after surgery and mebendazole has been prescribed for him as well as his close family members.
- A.
  
  S. stercoralis
- B.
  
  Capillaria species
- C.
  
  E. vermicularis
- D.
  
  A. lambricoides
7.

Enterobius vermicularis or pinworm is one of the most common parasites in humans affecting mainly children. The stage can be identified for diagnosis in:
- A.
  
  Eggs
- B.
  
  Cysts
- C.
  
  Trophozoites
- D.
  
  Sporozoites
8.

In the lumen of some female parasites, many oval eggs were seen in their gravid genital tract. The eggs can be identified for diagnosis in:
- A.
  
  Biopsy
- B.
  
  Perianal folds
- C.
  
  Autopsy
- D.
  
  Stool specimens
9.

Enterobius vermicularis or pinworms is one of the most common parasite in humans affecting mainly children, depositing their eggs:
- A.
  
  In the liver parenchyma.
- B.
  
  In the alveolar space.
- C.
  
  On perianal folds.
- D.
  
  In the lumen of the intestine.
10.

Enteriobius vermicularis or pinworm is one of the most common parasite in humans affecting mainly in children. The following statements humans get infected are correct except:
- A.
  
  By the fecal-oral route.
- B.
  
  By ingesting the parasite's eggs.
- C.
  
  From contaminated foods or water.
- D.
  
  By penetrating thru the skin.
11.

The disease is often asymptomatic but can sometimes manifest classically as nocturnal anal pruritus especially in children.
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  Enterobius vermicularis
12.

Acute appendicitis is the most common abdominal emergency worldwide. Several pathological mechanisms leading to appendiceal wall inflammation and luminal obstruction are thought to be responsible for the disease.
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
13.

Self-infection occurs by transferring infective eggs to the mouth with hands that have scratched the perianal area.
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella speies
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
14.

Gravid females migrate nocturnally outside the anus and oviposit while crawling on the skin of the perianal area.
- A.
  
  Ancyclostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
15.

In households where more than one member is infected or where repeated, symptomatic infections occur, it is recommended that all household members be treated at the same time.
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
16.

A person infected with parasitic infection is often asymptomatic, but itching around the anus is a common symptom of:
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
17.

Often the patient will complain of teeth grinding and insomnia due to disturbed sleep, or even abdominal pain or appendicitis.
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
18.

Gravid females migrate nocturnally outside the anus and oviposit while crawling on the skin of the perianal area.
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
19.

Self-infection occurs by transferring infective eggs to mouth with hands that have scratched the perianal area.
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
20.

The eggs are generally flat on one side and rounded on the other.
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
21.

Method of choice for recovery in "Pinworm Paddle" or a properly prepared scotch tape preparation.
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
22.

People who are infected with pinworm can transfer the parasite to others for as long as there is a female pinworm depositing eggs on the perianal skin.
- A.
  
  Ancylostoma duodenale
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis
23.

Once mature, the adult female pinworm migrates to the colon and lays eggs when many of their hosts are asleep.
- A.
  
  In the feces
- B.
  
  In the liver
- C.
  
  In the intestine
- D.
  
  Around the anus at night
24.

Once someone has ingested pinworm eggs, there is an incubation period of 1 to 2 months or longer for the adult gravid female to mature.
- A.
  
  In the small intestine
- B.
  
  In the large intestine
- C.
  
  In the liver
- D.
  
  In the lungs
25.

These eggs are deposited around the anus by the worm and can be carried to common surfaces such as hands, toys, bedding, clothing, and toilet seats.
- A.
  
  Ancyclostoma duodenalis
- B.
  
  Trichinella species
- C.
  
  Capillaria species
- D.
  
  E. vermicularis