Intestinal and Tissue Roundworms Class Nematoda 5.6

This Nematoda is known as the giant intestinal roundworm.

What are the two hookworms?

This organism is known as the pinworm or seatworm.

This organism is known as the whipworm

This is the smallest nematode parasite of man.

This Filarial nematode causes Bancroft's disease.

This filarial nematode is known as the eye-worm.

This Nematoda species causes River blindness.

This Nematoda species is known as the Guinea fireworm or dragon worm.

This class of organism is free living is water and soil, but parasitic to plants, mollusks, annelids, arthropods, and vertebrates.

Adult worms of this class have a thread-like body, cylindrical in cross section, are unsegmented, have have separate sexes.

Which nematoda are smaller, males or females?

true or false
Nematoda organisms have a complete digestive tract and nervous system
True False

This Nematoda attaches to tissue via penetration.

This nematoda uses oral method of attachment.

The nematoda organism Ascaris has what method of attachment?

What is the nematod that attaches via anchorage with attenuated ends?

This nematoda obtains nourishment via sucking blood.

This Nematoda obtains nourishment via ingestion of lysed tissues and blood.

This nematoda obtains nourishment by feeding on intestina contents.

These nematoda obtain nourishment by ingesting food from body fluids.

Nematoda ova are fertilized in __________. some spp have inner/outer shell. daily output is 20-20000.

Infection of Ascaris lumbricoides is by ingestion of what stage of development.

After ingestion of A. lumbricoides ova, the egg hatches and become __________ larva.

how long does it take Ascaris lumbricoides larva to travel to the liver, heart and lungs?

Larvae of A. lumbricoides infect the alveolar capillaries, bronchi and are then ____________.

This nematoda infection causes nutritional effects on children. it is the most common helminth infection, worms are passed from anus, nose or mouth.

The adult forms of this nematoda are white or pink in color with 3 oval lips, and a smooth finly striated cuticle.

Which sex of A. lumbricoides has a curled tail with 2 copulatory spicules?

Which sex of A. lumbricoides has paired reproductive organs in its posterior two thirds.

Which A. lumbricoides ova is round, ovid, yellow brown, thick shell covered by mammillated, albuminous coat, and a yolk with cleavage?

Which A. lumbricoides ova is similar to corticated fertile but has no albuminous coat, and a smooth decorticate surface?

Which A. lumbricoides ova is longer and narrow with amorphous yolk mass, and an irregular albuminous coat.

Which A. lumbricoides ova is elongated, has amorphous yolk mass and no albuminous coat.

Hookworms use what animal as almost an exclusive host.

adult hookworms reside in what part of the body?

Hookworm ova develop into rhabitiform larva in favorable environment, then they molt into _______ larva, this is the infective form.

How do filariform Hookworm larva enter the body?

Once hookworms are in the small intestines, they eat _______ and develop eggs which are passed in the feces.

Hookworms cause these erythemic spots at the site of entry knwon as ground itch or dew itch.

Hookworms suck blood causing what type of anemia?

Adult tapeworms are small, cylindrical, ___________ at both ends, grayish white with thick cuticle.

What is the morphologic difference between the two Hookworm species?

Which hookworm species has a dorsal pair of semilunar cutting plates, concave tooth, and triangular lancets.

Which hookworm species has a ventral pair of teeth?

Which sex of hookworm has a broad, translucent membranous caudal bursa with riblike rays for attachment during copulation.

Which sex of hookworm is larger with a pointed tail?

Ova of these nematoda cannot be differentiated between the two species. It has a thin transparent shell and 2-8 cell stages of division.

How are Hook worm rhabditiform larva differentiated from S. stercoralis?

How are Filariform larva of Hookworm differentiated from S. stercoralis?

This Nematoda has three types of life cycles. Direct, which is the parasitic cylce, Indirect, in which it is free living, and auto infection which is in the host.

This nematoda is asociated with Conchin-china diarrhea, which may cause chronic dysentery and weightloss in heavy infection.

S. stercoralis is contracted by _____ penetration by filariform larva that migrates to the lungs and is fatal to immunocompromised host.

The rhabitiform larva of this nematoda has an hour-glass shaped esophagus, and a short buccal cavity.

This form of S. stercoralis is rarely seen in feces and has a notched tail.

Humans are the only known host of this nematoda, adults live freely in the large and small intestines and there is no larval migration.

E. vermicularis ova are swallowed or inhaled by hand to mouth during ________ scratching.

E. vermicularis causes these two conditions characterized by puritis and pelvic inflammation, half of cases are asymptomatic.

This is the most common helminth infection in US.

Grinding of teeth in sleep is associated with this nematoda (if symptomatic) as well as poor appetite, sleep and weight loss, abdominal pain and N/V.

Adults of this nematoda have a pair of lateral cephalic alar. Males have a curved tail with a single spicule, females have long, pointed tail and prominent esophageal bulb.

Ova of this organism are oval shaped and flat on one side with a classic asymmetric loaf of bread appearance, may contain developed larva.

This is the most reliable, wide used method to detect Enterobius vermicularis.

true or false
Enterobius vermicularis IS diagnosed with O/P.
True False

The scoth tape collecitons must be done before AM bath or __________.

in the Scotch tape procedure, tape is looped over what sticky side out?

This may be added to slides for scotch tape procedure in order to clear prepartion.

Scotch tape procedure should be done for __ consecutive days.

This Nematode has spear like projections, ova emryonate in soil is the infective stage.

Infection by this Nematode is characterized by blood streaked diarrhea, abdominal pain, anemia, weight loss and rectal prolapse that may be fatal.

The ova of the Nematode is oval (football/lemon shaped), barrel with mucoid plugs on each end, yellow to brown

Adults of this Nematode are shaped like a whip with an anterior esophagus and posterior intestine and reproductinve organs.

Which sex of Trichuris trichiura has a curved tail with single spicule and retractile sheath

which sex of Trichuris trichiura has a bluntly rounded posterior end.

This nematoda uses humans, hogs, rats, bears, dogs, and cats as a reservoir. Larva encysts in striated muscle of raw or undercooked meat (pork)

When males and females of this Nematode copulate the male is expelled and the female produce live larva in the blood.

This Nematoda causes diarrhea, gastroenteritis, muscular pain, periorbital edema and overwhelming infection is fatal.

Muscle biopsy and serological testing is used to identify what Nematoda?

Filarial worms are ______ transmited, creamy white worms. females are twoice the male size.

These types of Nematoda have inconspicuous buccal cavit with no lips, cylindrical esophagus, female gives birth to prelarval microfilariae.

This Nematoda requires a mosquito, adult worms located in lymphatics.

This nematoda cuases varicose lymphatics and elephantiasis in 10% of cases.

This Nematoda is identified by thick and thin smear, sheath present, nuclei do not extgend to tip of tail

Humans and monkeys are the definite host of this Nematoda transmitted by the mango fly.

what is the species of Loa loa ingested by the mango fly?

Loa loa is found in __________ tissues and gains access to blood stream.

This is a hypersensitivity to secretions of adult Loa loa worms.

This nematoda is limted to the afrcan rain forest and causes meningo-encephalitis due to adult worms in CSF.

This threadlike cylindrica Nematoda has a singly stylet at anteroir end. nuclei extend to the tip of the tail and biopsy of subcutaneous tissue is required to ID.

This nematoda gives birth to microfilaria in nodules, which are ingested by Simulium spp. (black fly) during blood meal.

This Nematoda causes inflammatory reaction, nodules of varying size and eye lesions called onchocerciasis.

This Nematoda is found in tissue scrapings of nodules, does not have a sheath and no nuclei in either end. Diagnosis is made by finding adult in excised nodules.

Adults of this Nematoda are found in subcutaneous tissues especially lower extremities, it is found in contact with fresh water.

This Nematoda is accidental ingestion of microcrustaceans (copepods), gravid femal migrate to lower extemities.

This Nematoda secretes toxin which cause localized infection, allergic reaction and anaphylactic shock. secondary infectiosn include ulcers, worm dies if it fails to reach skin.

What is the sex of Dracunculus medinensis that is present in skin lesions?

What is the blood smear preparation where 1 ml of blood is drawn, and poured into tube containing 9 ml of 2% formalin to kill microfilaria, and let stand for 12-24 hours. centrifuge, decant and spread on slide uniformly.

Slides for knott procedure is stained for 45 minutes and de-stain for 10-15 minutes in ____ pH water. airdry and examined using 100x.