Question

Nocturnal periodicity is exhibited by

• A. Rhabditiform larva
• B. Microfilaria
• C. Ascaris
• D. Yersinia

Answer 1

The correct option is B

Microfilaria

The correct option is B.

Explanation of the correct option:

Option B:

1. Nocturnal periodicity is the circadian rhythm with a primary expression of periodicity.
2. It occurs during the night and the release or movement of the parasite into the peripheral blood.
3. This character is exhibited by Microfilaria.
4. Wuchereria bancrofti larvae called microfilariae show nocturnal periodicity.
5. It is less active during the day.

Explanation of the incorrect options:

Option A:

1. Rhabditiform larva is a larva that develops into a filarial worm which is a roundworm.
2. Parasite Rhabditiform larva becomes filariform in the large intestine, penetrates the intestinal mucosa, and then migrates to other organs.

Option C:

1. Acariasis is a worm parasitic disease caused by a giant worm called Ascaris lumbricoides which is a species of roundworm.
2. It is spread by an infected person's feces that reach the drinking water, food, or soil.

Option D:

1. Yersinia is a genus of bacteria that are gram-negative coccobacillus bacteria.
2. Yersinia pestis is the causative agent that causes plague and it is naturally found in rodents.

Final answer: Nocturnal periodicity is exhibited by Microfilaria.