Nematode Location in Human Intestine
This question asks to identify the intestinal parasitic nematode that does not infest the small bowel. We need to determine the typical habitat of the adult worms for each option within the human digestive tract.
- Ascaris lumbricoides: Adult worms predominantly reside in the small intestine.
- Necator americanus: This hookworm attaches to the wall of the small intestine (duodenum and jejunum).
- Strongyloides stercoralis: Adult females live burrowed in the mucosa of the small intestine, primarily the duodenum and jejunum.
- Trichuris trichiura: Also known as the whipworm, its adult stage resides in the large intestine, specifically the cecum and colon, where the anterior end burrows into the mucosa. It does not typically infest the small bowel.
Therefore, Trichuris trichiura is the nematode among the given options that does not infest the small bowel.
Important Questions from Metazoan Infections
- Which among the following is the first intermediate host for the parasitic fluke Clonorchis sinensis?
Which among the following are hepatobiliary flukes (trematodes)?
1. Clonorchis sinensis
2. Mansonella perstans
3. Fasciola hepatica
4. Opisthorchis felineus
Select the correct answer using the code given below:
- Which among the following parasitic helminths is a nematode and has zoonotic transmission?
Which of the following statements are correct in respect of scabies?
1. Male mite Sarcoptes scabiei are commonly transferred from an infected person to a non-infected person.
2. Norwegian scabies occur in immunodeficient patients.
3. Permethrin cream (5%) is used for treatment.
4. Pruritus intensifies at night and after hot shower.
Select the answer using the code given below :
Consider the following statements with regard to cysticercosis :
1. It may present as personality change.
2. Subcutaneous nodule may excised for histology.
3. Cerebral signs commonly do not occur until the larvae die, 5-20 years later.
4. Praziquantel can be given for 10 days.
Which of the statements given above are correct?
