Nematode (Phasmidea) Flashcards
most common intestinal roundworm
Ascaris lumbricoides
infective stage of ascaris lumbricoides
embryonated ova
common name of ascaris lumbricoides
giant intestinal roundworm
what is the definitive host of the ascaris lumbricoides?
no intermediate host needed
main habitat of ascaris lumbricoides
Lumen of the small intestine
2 types of ova in ascaris lumbricoides
unfertilized & fertilized
it has longer and narrower
unfertilized
it has broadly ovoidal and thick
fertilized
2 layers of the egg shell in an unfertilized ova/eggs
- albuminoid layer
- chorionic layer or true shell
3 layers of fertilized ova/eggs
- chorionic / true shell
- vitelline layer
- protein coat
same as fertilized but contains the larva of the embryo
embryonated
lacks the albuminous mamillated shell, usually seen in old specimen and may be fertilized or unfertilized
decorticated
describe the adult of ascaris lumbricoides
- white, creamy or pinkish yellow
- head is provided with 3 conspicuous lips
- each lip has minute twinned sensory papillae
give the 3 diseases under ascaris lumbricoides
ascariasis, dooryard or backyard infection
give at least 3 preventions for ascariasis
- personal hygiene
- avoid using night soil fertilizer
- cooking food properly
this process facilitates the recovery of eggs for the intestinal parasites
Kato Katz Technique
give 5 example of intestinal parasites
- ascaris lumbricoides
- trichuris trichiura
- hookworm
- schistosoma mansoni
- schistosoma japanicum
used for estimating the amount of worms and determine the severity of the infection
kato katz technique
what are the 3 kinds of human hookworms?
- Necator americanus
- Ancylostoma duodenale
- Ancylostoma ceylanicum
what are the 2 animal hookworms?
- ancylostoma braziliense
- ancylostoma caninum
what are the 3 developmental stage of hookworms?
- ova
- rhabditiform larva
- filariform larva
among the 3 developmental stage of hookworms, which is considered as an infective stage?
filariform larva
which developmental stage in hookworms that has long narrow buccal cavity?
rhabtidiform larva
it has 1 pair of semilunar cutting plates, dorsal median tooth, deep pair of triangular subventral lancets
Necator americanus
it has 2 pairs of fused ventral teeth
Ancylostoma duodenale
3 pairs of ventral teeth
Ancylostoma caninum
1 pair of larger outer teeth and 1 pair of very inconspicuous median teeth
Ancylostoma braziliense
what are the three diseases under hookworms?
- Necatoriasis
- Ucinariasis
- Anyclostomiasis
what are the three larval stage (hookworms)?
- ground itch
- creeping eruption
- pulmonary lesions
among the three larval stage of hookworms, which has a Wakana disease?
pulmonary lesions
