Blood and Tissue Nematodes

Question 1

Blood and Tissue Nematodes

The “_________ group”

Answer 1

microfilariae

Question 2

Blood and Tissue Nematodes

• General characteristics:

1. Require an_______ as an intermediate host.
2. Diagnosis is made by examining__________ thick and thin blood smears (except________ – skin scraping from nodules)
3. They exhibit periodicity.

Answer 2

arthropod Giemsa & stained

O. volvulus

Question 3

Blood and Tissue Nematodes

• The “microfilariae group”

Answer 3

1. Wuchereria bancrofti
2. Brugia malayi
3. Loa loa
4. Onchocerca volvulus

Question 4

Filarial worms morphology

Answer 4

Long, slender, thread-like nematodes

Question 5

Filarial

____of all species are parasites of vertebrate hosts including humans

Answer 5

Adults

Question 6

Adult female filarial worm is

Answer 6

viviparous (larviparous)

Question 7

giving body birth to living young rather than laying from eggs

Answer 7

viviparous (larviparous)

Question 8

Transmission and Diseases

• Spread by bite of an_____
• Mosquitoes, Black flies, Midges

• NOT by______

Answer 8

arthropod

feco-oral route

Question 9

• 8 known species of Filarial

Answer 9

Wuchereria bancrofti
Brugia malayi
Brugia timori
Loa loa
Onchocerca volvulus
Mansonella streptocerca
Mansonella perstans
Mansonella ozzardi

Question 10

Three groups according to anatomic location

Answer 10

Lymphatic filariasis
Subcutaneous filariasis
Serous cavity filariasis

Question 11

Lymphatic filariasis

Answer 11

• Wuchereria bancrofti, Brugia malayi, Brugia timori

Question 12

Subcutaneous filariasis

Answer 12

• Loa loa, Onchocerca volvulus, Mansonella streptocerca, Mansonella ozzardi

Question 13

Serous cavity filariasis

Answer 13

• Mansonella perstans