PERIODICITY AND MORPHOLOGY OF MICROFILARIA

Question 1

Which filarial worm exhibits nocturnal periodicity in microfilaremia and features microfilaria with a nucleus that does not extend to the tip of its tail?

Answer 1

• Wuchereria bancrofti

Question 2

What is the periodicity and microfilaria description for Brugia malayi?

Answer 2

• Periodicity: Nocturnal Subperiodic
• Description of Microfilaria: With 2 TERMINAL nuclei

Question 3

What is the periodicity of microfilariae in Loa loa, and how would you describe the microfilariae’s nucleus in this species?

Answer 3

• Microfilariae of Loa loa demonstrate diurnal periodicity, and their distinct characteristic is the nucleus that extends to the tip of the tail.

Question 4

What characterizes the microfilaria of Onchocerca volvulus?

Answer 4

• The unsheathed microfilaria of O. volvulus is non-periodic and has a nucleus that does not extend to the tip of its tail.

Question 5

Which filarial worm exhibits unsheathed microfilaria with a non-periodic periodicity and a nucleus extending to the tip of the tail?e

Answer 5

• Mansonella perstan

Question 6

Which filarial species presents unsheathed microfilaria with a nucleus extending to the tip of its curved tail and exhibits non-periodic periodicity?

Answer 6

• Mansonella streptocerca

Question 7

What defines the term “PERIODICITY” regarding Microfilaria?
A) Random and irregular appearance
B) Lack of specific developmental stages
C) Rhythmical appearance in the blood
D) Continuous presence in the bloodstream

Answer 7

C) Rhythmical appearance in the blood

Question 8

Which of the following properties characterizes Microfilaria?
A. Sheathed or unsheathed
B. Exhibits periodicity
C. Larval stage
D. Requires intermediate host

Answer 8

A. Sheathed or unsheathed

Question 9

What is the habitat of Wuchereria bancrofti?

Answer 9

• Lower lymphatics

Question 10

Which mosquitoes serve as vectors for Wuchereria bancrofti?

Answer 10

• Mosquitoes such as Aedes, Culex, Anopheles, and Mansonia spp

Question 11

What is the habitat of B. malayi?

Answer 11

• B. malayi inhabits the upper lymphatics.

Question 12

Which mosquitoes serve as vectors for B. malayi?

Answer 12

• **Mosquitoes of the Mansonia spp. **

Question 13

What are the habitats of Mansonella perstans and Mansonella ozzardi?

Answer 13

• Both Mansonella perstans and Mansonella ozzardi inhabit body cavities.

Question 14

What is the vector for Mansonella perstans / streptocerca and Mansonella ozzardi?

Answer 14

midges, specifically Culicoides flies.

Question 15

What is the habitat of M.streptocerca, and what is its vector?

Answer 15

• Dermis of the skin, residing less than 1mm from the skin surface. Its vector is midges, specifically Culicoides flies.

Question 16

What is the habitat and vector of Onchocerca volvulus?

Answer 16

• Onchocerca volvulus resides in the subcutaneous tissues, and its vector is black flies.