NEMATODES
PARASITE COMMONNAME HABITAT DEFINITIVE INTERMEDIATE MODE OF INFECTIVE DIAGNOSTI
HOST HOST TRANSMISSION STAGE STAGE
Ancylostoma Old world Small
duodenale hookworm intestine FILARIFORM EGGS / OVA
LARVA
Giant intestinal
Ascaris roundworm / Small MAN NONE INGESTION / EMBRYONATED FERTILIZED &
lumbricoides eelworm intestine FECAL-ORAL EGG UNFERTILIZED
ROUTE
Capillaria Small
philippinensis Pudoc worm intestine LARVA UNEMBRYONA
EGG
Enterobius
vermicularis / Pinworm / Large MAN INGESTION EMBRYONATED EMBRYONAT
Oxyuris seatworm Intestine EGG EGG
vermicularis
New world Small EGGS / OVA
Necator hookworm intestine FILARIFORM
americanus LARVA
Strongyloides
stercoralis Threadworm Small FILARIFORM RHABDITIFOR
intestine LARVA LARVA
, FILARIAL WORMS
COMMON DEFINITIVE INTERMEDIATE MOT INFECTIVE DIA
PARASITE NAME HABITAT HOST HOST (Skin inoculation) STAGE
VECTOR:
Brugia malayi
Malavan filaria Upper lymphatic Humans, Mosquito Mansonia spp.
monkeys,
domestic cats,
and forest To man:
carnivores 3rd stage
Loa loa Chrysops fly larva
Eyeworm Subcutaneous Flies Deer fly M
tissue Mango fly To vector: (All
Microfilaria sa
Mansonella e
ozzardi Ozzard’s filaria Diptera species volv
uses
Mansonella Culicoides flies
perstans Persistent filaria Human Biting midges
Mansonella Body cavities
streptocerca - - Biting midges -
Onchocerca
volvulus Convoluted filaria Subcutaneous Blackfly Simulium or black
tissue fly To man:
Wuchereria Bancroft’s filaria Lower Lymphatic Human 3rd stage
bancrofti (adut stage ang Aedes (breeds larva
PARASITE COMMONNAME HABITAT DEFINITIVE INTERMEDIATE MODE OF INFECTIVE DIAGNOSTI
HOST HOST TRANSMISSION STAGE STAGE
Ancylostoma Old world Small
duodenale hookworm intestine FILARIFORM EGGS / OVA
LARVA
Giant intestinal
Ascaris roundworm / Small MAN NONE INGESTION / EMBRYONATED FERTILIZED &
lumbricoides eelworm intestine FECAL-ORAL EGG UNFERTILIZED
ROUTE
Capillaria Small
philippinensis Pudoc worm intestine LARVA UNEMBRYONA
EGG
Enterobius
vermicularis / Pinworm / Large MAN INGESTION EMBRYONATED EMBRYONAT
Oxyuris seatworm Intestine EGG EGG
vermicularis
New world Small EGGS / OVA
Necator hookworm intestine FILARIFORM
americanus LARVA
Strongyloides
stercoralis Threadworm Small FILARIFORM RHABDITIFOR
intestine LARVA LARVA
, FILARIAL WORMS
COMMON DEFINITIVE INTERMEDIATE MOT INFECTIVE DIA
PARASITE NAME HABITAT HOST HOST (Skin inoculation) STAGE
VECTOR:
Brugia malayi
Malavan filaria Upper lymphatic Humans, Mosquito Mansonia spp.
monkeys,
domestic cats,
and forest To man:
carnivores 3rd stage
Loa loa Chrysops fly larva
Eyeworm Subcutaneous Flies Deer fly M
tissue Mango fly To vector: (All
Microfilaria sa
Mansonella e
ozzardi Ozzard’s filaria Diptera species volv
uses
Mansonella Culicoides flies
perstans Persistent filaria Human Biting midges
Mansonella Body cavities
streptocerca - - Biting midges -
Onchocerca
volvulus Convoluted filaria Subcutaneous Blackfly Simulium or black
tissue fly To man:
Wuchereria Bancroft’s filaria Lower Lymphatic Human 3rd stage
bancrofti (adut stage ang Aedes (breeds larva
