General Questions Flashcards by Danica Polbos

Describes the morphological characteristics of Trichinella spiralis except: (Select all that applies)

a. Posterior body part is only slightly thicker than the anterior part
b. Eggs contain undeveloped embryos when in the uterus
c. Male do not have spicules but have spicule sheath
d. Hind end bears lateral flaps

b. Eggs contain undeveloped embryos when in the uterus
c. Male do not have spicules but have spicule sheath

How well did you know this?

Not at all

Perfectly

What is not true about Trichinella spiralis? (Select all that applies)

a. Female is larviparous
b. Larva is free living stage
c. Hind end bears lateral flaps on either side of the cloacal opening with 2 pairs of papillae behind them
d. Target site is large intestine
e. Adults and encysted larvae of Trichinella spiralis develop within the same host, but two hosts are required to complete the life cycle
f. Can be acquired through carrion feeding

b. Larva is free living stage
d. Target site is large intestine

How well did you know this?

Not at all

Perfectly

How many Trichinella spiralis larvae or grams of BW will be fatal for man, hogs, and rats?

5, 10, 30, respectively.

How well did you know this?

Not at all

Perfectly

What is the drug of choice of T. spiralis?

Thiabendazole

How well did you know this?

Not at all

Perfectly

These statements describe whipworms, except: (Select all that applies)

a. Affected site is cecum and colon
b. Symptom free in most canine infections
c. Febantel is treatment for man
d. Males do not have spicule
e. It has long and slender anterior body part and long thicker posterior part
f. No exception

d. Males do not have spicule
e. It has long and slender anterior body part and long thicker posterior part

How well did you know this?

Not at all

Perfectly

Give the morphological characteristics of Trichuris species

a. Have spear like projection at the anterior end used for anchorage
b. Long slender anterior part, short thicker posterior part
c. Male has coiled caudal extremity
d. Spicule surrounded by protrusible sheath armed by cuticular spines
e. Egg is lemon or barrel shaped

How well did you know this?

Not at all

Perfectly

Which nematodes are best described by this statement: small adult body resembling Trichuris spp. and lies partially embedded in mucous membranes or buried in tissue?

a. Trichinella spiralis
b. Hairworms
c. Giant kidney worms
d. None of the above

Hairworms

How well did you know this?

Not at all

Perfectly

Give 2 morphological characteristics of Trichosomoididae

a. Males degenerate and parasitic in the uterus of females
b. Thick shelled egg with bipolar plugs

How well did you know this?

Not at all

Perfectly

The statements provided describe the morphological characteristics of the giant kidney worm, except: (Select all that applies)

a. Flesh like color when fresh
b. Male has copulatory bursa without spicule
c. Vulva is mid-ventral near the anterior end of the worm
d. Embryonated ova are barrel shaped and greenish yellow

b. Male has copulatory bursa without spicule
d. Embryonated ova are barrel shaped and greenish yellow

How well did you know this?

Not at all

Perfectly

An intestinal parasite that is a dangerous allergen causing anaphylaxis

ascaris

How well did you know this?

Not at all

Perfectly

Causes bovine toxocariosis especially in calves and caracalves younger than 6 months of age

Toxocara vitulorum

How well did you know this?

Not at all

Perfectly

What are the three arrowheaded worms of dogs and cats?

Toxocara canis, Toxocara cati, Toxascara leonine

How well did you know this?

Not at all

Perfectly

Children playing in areas contaminated with arrowheaded worms may be affected with these diseases (3)

VLM, OLM, Covert form

How well did you know this?

Not at all

Perfectly

Toxocara spp found in fruit bats

Toxocara pteropodis

How well did you know this?

Not at all

Perfectly

Toxocara spp found in caracals

T. lyncus

How well did you know this?

Not at all

Perfectly

Identify the biggest nematode of poultry

Ascardia galli

How well did you know this?

Not at all

Perfectly

Mechanical carriers of Heterakis

earthworms and beetles, houseflies (book)

How well did you know this?

Not at all

Perfectly

These species have inconspicuous lips and well developed esophageal bulbs

Oxyuridae

How well did you know this?

Not at all

Perfectly

Identify the drugs that should not be given to poultry in treatment of Heterakis spp infection

piperazine salts and pyrantel tartrate

How well did you know this?

Not at all

Perfectly

Name the family of pinworms found in equines, apes and tortoises

Probstmayria vivipara

How well did you know this?

Not at all

Perfectly

Known as the minute pinworm and the smallest of the adult nematodes of the digestive tracts of equids

Probstmayria vivipara

How well did you know this?

Not at all

Perfectly

Give the four superfamilies of Order Strongylida

Large bowel strongyles of horses, nodular worms, kidney worm, and tracheal worms

eggs are elongate, flattened on one side, provided with a plug on one pole

a. human pinworm
b. oxyuris equi
c. probstmayria vivipara

oxyuris equi

eggs are assymetrical, 1 side flat, translucent shell

a. Toxocara
b. ascaridea
c. heterakis gallinarum
d. enterobius vermicularis

Which of these species have well developed esophagus with posterior bulb? a. Trichinella spiralis b. Ascaridia spp c. Oxyuris equi d. Toxascara leonina

Oxyuris equi

Which of these spp do not have bulb on their esophagus? a. Ascaridia spp b. Enterobius vermicularis c. Trichosomoides crassicauda d. Dioctophyma renale

a. Ascaridia spp

These species have their vulva near the middle end of the esophagus

T. spiralis

their eggs contain fully developed embryo when in uterus

T. spiralis

they have lemon or barrel shaped, translucent polar prominences

Trichuris

Colorless, more barrel shaped, polar plugs do not project far

Capillaria spp

Posterior part is not thicker than anterior, more or less equal in thickness

Capillaria

Thick shelled with bipolar plugs a. Dioctophyma renale b. Trichuris spp c. Trichosomoides crassicauda d. Ascaris suum

Trichosomoides crassicauda

Which of these species of family Trichinellidae have protrusible anterior vulva? a. Capillaria b. Trichinella c. hairworms d. Dioctophyma

Capillaria

their vulva are situated at the beginning of the wide body part

whipworms

Which of these species have terminal narrow appendage with caudal alae? a. T. canis b. T. cati c. Neospara vitulorum d. Toxascara leonina

T. canis

Their tail have long finger like processes

T. cati

shape of T. leonina cervical alae

lanceolate

symptom free in most canine infections but may produce bouts of diarrhea in heavy infections

Whipworms

paratenic hosts of giant kidney worm

frog & fishes

these are rigid, stout worm with 3 conspicous main lips

Parascaris equorum

identify the spp with posterior granular ventriculus at the base of the esophagus

Toxocara canis

their cervical alae gradually tapers into the body

toxocara cati

spp with one pin shaped spicule

oxyuris equi

which roundworm can cause parasitic aneurysm?

Strongylus vulgaris

known as the nodular worms

Oesophagostomum

identify the nematodes with bell shaped buccal capsule and double leaf crowns

Chabertia ovina

CN of Chabertia ovina

large mouthed bowel worm

these large and stout roundworms have cup-shaped buccal capsule with teeth and epaulettes

Stephanurus dentatus

their eggs are ellipsoidal and operculated at both ends

Syngamus spp

they bear teeth at the margin of the buccal capsule

Ancylostoma caninum

These species are not transmitted by prenatal or colostral infection, except: a. Ascaris suis b. Toxascaris leonina c. Ancylostoma duodenale d. Toxocara cati

d. Toxocara cati (transmitted via mlk)

These adults are mainly found in the stomach or small intestine of marine mammals such as pinnipeds and cetaceans

Family Anisakidae

these are the only helminth infection considered to be facultative opportunistic in HIV infected patients

Strongyloides