BLOOD AND TISSUE NEMATODES (FILARIAE) Flashcards
ARTHROPOD VECTOR
Mosquitoes (Aedes, Culex,
Anopheles, Mansonia spp.)
Wuchereria bancrofti
ARTHROPOD VECTOR
Mosquitoes (Mansonia spp.)
Brugia malayi
ARTHROPOD VECTOR
Deerflies/Mangoflies
(Chrysops spp.)
Loa loa
ARTHROPOD VECTOR
Midges (Culicoides spp.)
Mansonella perstans
Mansonella ozzardi
Mansonella streptocerca
ARTHROPOD VECTOR
Blackflies (Simulium spp.)
Onchocerca volvulus
HABITAT is Lower lymphatics
Wuchereria bancrofti
HABITAT is Upper lymphatics
Brugia malayi
HABITAT is Subcutaneous tissues and eyes
Loa loa
Onchocerca volvulus
HABITAT is Body cavities
Mansonella perstans
Mansonella ozzardi
HABITAT is Dermis of skin
Mansonella streptocerca
DISEASE/S CAUSED
Lymphedema of the limbs,
breast, or scrotum
W. bancrofti
DISEASE/S CAUSED
Elephantic lesions in the
upper limbs
B. malayi
DISEASE/S CAUSED
Calabar or fugitive swelling
Loa loa
DISEASE/S CAUSED
Pruritic papules
M. streptocerca
DISEASE/S CAUSED
Onchocercoma,
river blindness
O. volvulus
Microfilaria is seen in BLOOD specimen
Microfilaria is seen in SKIN NIPS or BIOPSY
Blood: W. bancrofti, B. malayi, L. loa, M. perstans, M. ozzardi
SKIN NIPS / BIOPSY: M. streptocerca and O. volvulus
Sheathed Microfilariae
W. bancrofti
B. malayi
L. loa
UNSheathed Microfilariae
M. perstans
M. ozzardi
M. streptocerca
O. volvulus
Nuclei do not extend to the tip of tail “BDO”
W. bancrofti
M. ozzarDi
O. volvulus
Nuclei extends to the tip of tail “LPS”
L.loa
M. perstans
M. streptocerca “Sheperd`s crook”
With 2 distinct terminal nuclei
B. malayi
periodicity of between 10pm to 2am; blood is collected at NIGHT
Nocturnal periodic
W. bancrofti
microfilaria found in blood duirng DAYTIME and collected between 11am to 1pm
Diurnal periodic
L. loa
microfilaria is found in blood during both DAY & NIGHT (but more prominent during NIGHT)
Nocturnal subperiodic
B. malayi
