filarial worms Flashcards
InfectiveStage
L3 larvae
substance coming from the mosquito, which protects the larva
hemolymph
Affectsthe Lower Limb (Sometimes Scrotum
Wuchereria bancrofti
Vectors/Transmitters are species of:
○ Aedes
○ Anopheles
○ Culex
○ Mansonia
Wuchereria bancrofti
TheAdult Worms of _______________ inhabit the Lymphatic Vessels and Glands
Wuchereria bancrofti
Minute, Thread-Like, Smooth-Skinned, and Tapered on Both Ends
W. bancrofti Adult
● Sheathedwith Graceful Curves
● BodyNuclei Are Equidistant And Regularly Distributed
microfilaria of?
wuchereria bancrofti
● SecondaryKink, Upper Limb
Brugia malayi
● Threadlike, smooth, and tapered on both ends but
bluntly rounded at the terminal part
Brugia malayi
○ UnevenlyDistributed Body Nuclei
TwoProminent Terminal Nuclei (Diagnostic
Microfilaria Brugia malayi
eye worm
loa loa
Vectors/Transmitters
○ Tabanidflies of Genus Chrysops
○ DeerFly
○ Horsefly
○ MangoFly
○ MangroveFly
Loa loa
○ IrregularlyDistributed Body Nuclei that reached
up to the Caudal End
○ VerySmall or No Cephalic Spaces
VerySmall or No Cephalic Spaces ○ IrregularCurves of Body covered with Thin Transparent Sheath
Loa loa microfilaria
River Blindness
Onchocerca volvulus
Present in
○ Senegal, Mali, Sudan, Liberia, Uganda, Mexico
Onchocerca volvulus
Vectors/Transmitters
○ Blackfliesof Genus Simulium
Onchocerca volvulus
Adultworms are White, Opalescent, and Transparent
Onchocerca volvulus
Vectors/Transmitters
○ Midgesof Genus Culicoides
Mansonella ozzardi & perstans
○ Thetail end is tapered like a filament
○ Containsa column of four to six ovoid or bar-like body nuclei
Mansonella ozzardi
effective against the microfilariae of W. bancrofti only, not the adult worm
Ivermectin
● Nativein South America & Africa
Mansonella perstans
● Unsheathed
● Adultworms inhabit the body cavities in man
Mansonella perstans
○ Thebody nuclei fill up the entire body
NoDistinct Space at Cephalic or Tail End
Mansonella perstans
Enlarged lower extremities, due to lymphedema, assume the appearance of an?
elephant’s legs (elephantiasis)