parasit lab: nematodes

nemathelminthes

phylum of round worms

egg

can be classified as fertilized or unfertilized

ova

can be classified as embryonated or unembryonated

ascaris lumbricoides

most common human helminthic infection globally

giant intestinal roundworm

common name of ascaris lumbricoides

small intestine

habitat of ascaris lumbricoides

humans

final host of ascaris lumbricoides

embryonated egg

infective stage of ascaris lumbricoides

egg

diagnostic stage of ascaris lumbricoides

ingestion of embryonated egg (soil)

mode of transmission of ascaris lumbricoides

200,000

Female worm produces approximately ____ eggs per day.

moist, warm, shaded soil

optimum environmental conditions for the larvae to develop

male

curved posterior tail

female

long pointed tail

cuticle

a tough layer of protection in the outermost layer

genital girdle

responsible for the contractions for the releasing of the ova in females

trilobated lips

Ascaris lumbricoides has also been called a “good kisser” because it has ____ for both females and males

albuminoid coat or mammilary coat

outer layer of unfertilized ovas

glycogen layer

middle layer of unfertilized ovas

inner lipoidal and vitelline

unfertilized eggs lack the _____ layer

corticated

when albuminoid/mammilary coat is prominent

decorticated

egg is smooth and the mamillary coat is not present or extremely minimal

loeffler's syndrome

ascaris lumbricoides causes

Albendazole & Mebendazole

ascaris lumbricoides drug treatment

intestinal obstruction

if a large amount of eggs ingested of about 200,000 eggs per day overtime if chronically progressed may lead to ____.

trichuris trichiura

Also called Trichocephalus triciura
● Soil Transmitted Helminth (STH)

whipworm

common name of trichuris trichiura

large intestine

habitat of trichuris trichiura

humans

final host of trichuris trichiura

embryonated egg

infective stage of trichuris trichiura

egg

diagnostic stage of trichuris trichiura

ingestion of infective stage

mode of transmission of trichuris trichiura

4-8 years

trichuris trichiura lifespan

single lanceolate specule

male end of the posterior has a ___

barrel, football, japanese lantern, lemon

trichuris trichiura resembles __

bipolar

has ___ mucus plugs

Capillary philippinensis ova

trichuris trichiura is confused with __

pin-fashion

adult attaches and burrows its anterior end into the intestinal mucosa in a ___ manner

enterobius vermicularis

originally called the Oxyuris vermicularis

pinworm, seatworm (tiwa), worm of society

common names of enterobius vermicularis

large intestine

habitat of enterobius vermicularis

humans

final host of enterobius vermicularis

embryonated egg

infective stage of enterobius vermicularis

egg

diagnostic stage of enterobius vermicularis

inhalation; autoinfection, retroinfection

mode of transmission of enterobius vermicularis

autoinfection

you infect yourself such as through ingestion of self-contaminated foods

retroinfection

migration of newly hatched larvae from the anal skin back into the rectum

oviposition

females die after __

copulation

males die after ___

2 months

adult life span of enterobius vermicularis

Gravid females

____ migrate nocturnally outside the anus and oviposit while crawling on the skin of the perianal area

cephalic alae/lateral

adult enterobius vermicularis possess ____ wings

esophageal

adult enterobius vermicularis possess ____ bulb that is flask shaped

male

shorter and thinner; curved posterior talk

females

longer and wider; pointed posterior tail

plano convex/lopsided/D-shaped egg

enterobius vermicularis egg shape
one side is flat while the other is curved

perianal swab

diagnosis of enterobius vermicularis

male trichuris trichiura

identify

enterobius vermicularis egg

identify

cephalic alae or lateral wings

identify

true

T/F: Cephaluc alae is found in the anterior end of adult Enterobius vermicularis

false

T/F: Male pinworm can be recovered in scotch tape swab