VET 123 Test 1, Cestoda & Arthropod Quiz

Which of the following statements about parasites that affect domestic animals is not true? Some species of leeches are used for medicinal purposes in reconstructive surgery. Leeches are blood-feeding endoparasites typically found in freshwater. Adult thorny-headed worms are very uncommon parasites. Acanthocephalans have a spiny proboscis on their anterior end

Leeches are blood-feeding ectoparasites typically found in freshwater

The holdfast organelle of both true tapeworms and pseudo tapeworms is called the: scolex proglottid rostellum strobila

scolex

The hexacanth embryo of Dipylidium caninum is eaten by the maggot-like larva of the _____________, the intermediate host for this tapeworm. deer mouse aquatic snail deer tick cat flea

cat flea

Anopluran lice do not parasitize ______or________. swine; birds cats; rabbits swine; rabbits cats; birds

cats; birds

The __ is known to be a vector for Borrelia burgdorferi. American dog tick Rocky Mountian wood tick brown dog tick deer tick

deer tick

If a dog laying in moist soil develops a parasitic skin infection as the result of coming into contact with a free-living roundworm, the roundworm would be called a/an ________ parasite. obligatory aberrant incidental facultative

facultative

Trematodes and cestodes are similar because they lack a digestive tract. have muscular attachment suckers. have separate sexes. have direct life cycles

have muscular attachment suckers.

Sarcoptic mange is an example of injury on migration. injury on entry. injury caused by host reaction. injury by residence.

injury on migration.

Gastrophilus sp. are insects. nematodes. cestodes. trematodes

insects

Otodectes cynotis is a: Arthropod Nematode Cestode Trematode

Arthropod (ear mite)

Ticks can survive for as long as _______ without a blood meal. 3 months 3 years 1 month 1 year

3 years

All of the following statements about true tapeworms are accurate except: A. animals harboring the larval stages are the definitive hosts. B. they absorb nutrients through their skin. C. in their respective hosts, the larval stages may cause more pathology than the adults. D. the larval stages can be found in extraintestinal tissue.

A. animals harboring the larval stages are the definitive hosts

Symbiotic relationships can be all of the following except: A. transparent B. beneficial C. indifferent D. detrimental

A. transparent

Which of the following parasiticides would be used to treat an animal that harbors mites?

Acaricides

Which of the following statements about Multiceps multiceps is the least accurate? Adults are found in the dog's subcutaneous or intermuscular tissue. Its metacestode stage is a single, large bladder with several invaginated scolices attached to its inner wall. Preventing ingestion of sheep carrion or offal by the dog is critical to breaking this tapeworms life cycle. The metacestode stage causes neurologic signs in the intermediate host.

Adults are found in the dog's subcutaneous or intermuscular tissue.

Which of the following statements about Multiceps multiceps, a true tapeworm of dogs, is the most accurate? Rabbits are the intermediate host. Its metacestode stage develops within subcutaneous tissues of the intermediate host. Adults possess a scolex with a double row of rostellar hooks. Its metacestode stage is a hydatid cyst

Adults possess a scolex with a double row of rostellar hooks.

Pentasomes, whose nymphs and adults grossly resemble helminths, are member of the phylum__________. Platyhelminthes Arthropods. Nematoda Annelida

Arthropods

Which of the following statements about pseudo tapeworms is the most accurate? A. They are leaf-shaped. B. Their larval stages seldom produce pathology in domestic animals. C. Their larval stages are found in mites and ticks. D. The adults infect the respiratory system

B. Their larval stages seldom produce pathology in domestic animals.

A/an ________ host is a vertebrate host living in the wild that harbors an endoparasite that can be transmitted to domesticated animals. A. paratenic B. reservoir C. intermediate D. definitive

B. reservoir

All of the following statements about digenetic flukes are true except: A. they have operculated eggs. B. they are ectoparasites. C. they are leaf-shaped. D. they parasitize both large and small animals.

B. they are ectoparasites

A fixed angle centrifuge keeps tubes at __ degrees while spinning and stationary A. 42 B. 62 C. 52 D. 32

C. 52 degrees

Cestodes are members of the phylum: A. Arthropoda B. Nematoda C. Platyhelminthes D. Annelida

C. Platyhelminthes

If a human becomes infected with the larval stages of Dirofilaria immitis, the parasite is called a/an ____________ parasite. A. aberrant B. obligatory C. incidental D. facultative

C. incidental

In parasitism, the parasite becomes ________________ the host A. anatomically indistinguishable from B. attached to C. metabolically dependent on D. physiologically indistinguishable from

C. metabolically dependent on

Because this mite is highly contagious and zoonotic, owners should be especially concerned if a pet dog, cat, or rabbit is diagnosed with __________. Demodex canis Otodectes cynotis Cheyletiella species Sarcoptes scabiei

Cheyletiella species

Ticks that affect small animals include all of the following except Ixodes species Dermacentor species Amblyomma species Cheyletiella species

Cheyletiella species (since they are mites)

The parasite that live on the skin's surface is Otodectes species Sarcoptes species Demodex species Chorioptes species

Chorioptes species

The parasite whose larvae encyst in the subcutaneous tissue of rabbits is: Larval __________ species are usually found in swollen, cystlike subcutaneous sites, with a fistula communicating to the outside environment. Cuterebra species Gasterophilus species Oestrus species Hypoderma species

Cuterebra species

Which of the following statements about Echinococcus species is the least accurate? Infection with Echinococcus species is a reportable disease. The greatest pathogenicity of Echinococcus species is to the intermediate host. Definitive diagnosis is achieved by identifying the eggs of Echinococcus species on fecal flotation. The intermediate hosts for Echinococcus granulosus include sheep and cattle.

Definitive diagnosis is achieved by identifying the eggs of Echinococcus species on fecal flotation.

The parasite known as a winter tick is: Dermacentor albipictus Ixodes dammini Dermacentor variabilis Rhipicephalus sanguineus

Dermacentor albipictus

Vectors for Rocky Mountain spotted fever include rodents. birds. Ctenocephalides felis. Dermacentor spp. ticks

Dermacentor spp. ticks

Which of the following is the correct spelling for the pseudo tapeworm known as the broad fish tapeworm? Diphyllobothrium latum Diphyllobothrium latenum Difyllobothrium latum Difillobothrium latenum

Diphyllobothrium latum

In addition to reptiles, which of the following can serve as the definitive host for pentasomes? Rats Rabbits Cats Dogs

Dogs

Cheyletiella mites use ______ as their hosts. Dogs, cats, and rabbits Cats, dogs, and rodents Dogs, rabbits, and birds Cats, birds, and rodents

Dogs, cats, and rabbits

__________ is known as the sticktight flea of poultry. Echidnophaga gallinacea Odontopsylla multispinosus Ctenocephalides felis Cediospylla simplex

Echidnophaga gallinacea

________ best describes mites that reside on the surface of the skin or within the external ear canal. Family Psoroptidae Sarcoptiform Nonsarcoptiform Family Sarcoptidae

Family Psoroptidae

The parasite whose eggs are cemented to the hair of horses is: __________ is a fly whose larvae infect the gastrointestinal tract of horses. Hypoderma species Cuterebra species Oestrus species Gasterophilus species

Gasterophilus species

Which is not a characteristic of theSpirometra of pseudo tapeworms? They often are found in pets residing in Florida and along the Gulf Coast. Gravid proglottids are not discharged in the animal's feces. Their mature proglottids separate along the longitudinal axis. Humans can serve as the second intermediate host by ingesting fish containing the first larval stage

Humans can serve as the second intermediate host by ingesting fish containing the first larval stage

The parasite whose larvae form warbles in the subcutaneous tissue along the backs of cattle is: Hypoderma species Oestrus species Cuterebra species Gasterophilus species

Hypoderma species

Which of the following statements about Taenia solium is the most accurate? The metacestode stage is referred to as beef measles or measly beef. The larval stage for Taenia solium is a bladder worm known as Cysticercus bovis. In the definitive host, the cysticercus stage can develop within the eyes, brain, and spinal cord. The infective metacestodes are found in the smooth muscle of the intermediate host.

In the definitive host, the cysticercus stage can develop within the eyes, brain, and spinal cord.

Which of the following statements about Taenia saginata is the most accurate? The adult T. saginata has an armed rostellum. The infective metacestodes are found in the mucosal lining of the small intestine of the intermediate host. The metacestode stage is referred to as pork measles or measly pork. In the intermediate host, large quantities of cysticerci cause myositis

In the intermediate host, large quantities of cysticerci cause myositis

Which of the following statements about Echinococcus multilocularis is the most accurate? It is the hydatid cyst tapeworm of dogs. In sufficient numbers, the adults can cause intestinal obstruction. It is among the largest tapeworms encountered in veterinary parasitology. Its strobila consists of only three proglottids

Its strobila consists of only three proglottids

The parasite whose larvae enter the nasal cavity of sheep is: Gasterophilus species Hypoderma species Oestrus species Cuterebra species

Oestrus species

Which of the following statements about sarcoptiform mites that infest guinea pigs is the least accurate? Older guinea pigs are particularly susceptible to infestation by Sarcoptes scabiei mites. Sarcoptes scabiei can be transmitted from rabbits to guinea pigs. Triacarus caviae is the burrowing mite of guinea pigs. Notoedres muris can infest guinea pigs.

Older guinea pigs are particularly susceptible to infestation by Sarcoptes scabiei mites.

Which of the following statements about Boophilus annulatus, the Texas cattle fever tick, is the least accurate? It is an inornate tick. It is an intermediate host for the protozoan parasite, Babesia bigemina. Only the adults are found on infested cattle. When diagnosed, it must be reported to the U.S. Department of Agriculture.

Only the adults are found on infested cattle.

Which parasite completes it's life cycle on or in its host? Hypoderma species Otodectes species Ctenocephalides species Dermacentor species

Otodectes species

Which of the following statements about centipedes and millipedes is the least accurate? Poisonous centipedes and millipedes are found throughout North America Millipedes have two pairs of legs for every body segment Millipedes are vegetarians Centipedes make better family pets than do millipedes

Poisonous centipedes and millipedes are found throughout North America

Which is a characteristic of the pseudo tapeworm known as the broad fish tapeworm? The adults absorb vitamin D to the point that the tapeworm can cause keratoconjunctivitis in the definitive host. Gravid proglottids are discharged in the animal's feces. Preventing predation or ingestion of raw fish by dogs and cats will interrupt its life cycle. Humans can become the definitive host by ingesting unembryonated eggs

Preventing predation or ingestion of raw fish by dogs and cats will interrupt its life cycle.

Which of the following mites is not reportable to the U.S. Department of Agriculture? Psoroptes bovis Psoroptes equi Psoroptes cuniculi Psoroptes ovis

Psoroptes cuniculi

What is the nonburrowing mite that causes intense pruritus and wool damage in sheep? Psoroptes spp. Cheyletiella spp. Sarcoptes scabiei Demodex spp

Psoroptes spp.

Which of the following is a hard tick that has the unusual distinction of being found indoors as well as outdoors? Rhipicephalus sanguineus Otobius megnini Dermacentor variabilis Ixodes scapularis

Rhipicephalus sanguineus

Scabies is caused by: Trombicula species Sarcoptes species Melophagus species Otodectes species

Sarcoptes species (parasite that burrows into skin)

Which is not true about a swing arm centrifuge? Possible sediment and supernatant mixture when the spinning stops and reverts to vertical position. Tube holders swing out in motion when on. Heat builds up at excessive speeds Spins at a higher speed than the angled centrifuge

Spins at a higher speed than the angled centrifuge

_________ is not a taeniid of dogs. Taenia taeniaeformis Taenia hydatigena Taenia pisiformis Taenia ovis

Taenia taeniaeformis

Which of the following statements about Taenia saginata and Taenia Solium is the least accurate? The adults possess a uterus with multiple lateral branches. The adult pork tapeworm can cause obstruction of the intestinal tract of the definitive host if present in sufficient numbers. The infective metacestodes are found in the skeletal and cardiac muscles of the intermediate host. The definitive host is dogs that ingest cattle and pig carrion or offal.

The definitive host is dogs that ingest cattle and pig carrion or offal.

Which of the following statements about parasites is the least accurate? As with the tapeworms, thorny-headed worms lack an alimentary canal The phylum Arthropoda is the largest phylum in the animal kingdom. The majority of protozoans are parasitic. The nematodes are the largest group of helminths affecting domestic animals.

The majority of protozoans are parasitic

Which of the following statements about tapeworms is the most accurate? Proglottids that pass in the feces are microscopic. Their eggs contain a hexcanth embryo with five hooks. They always require an intermediate host. Proglottids that pass in the feces lack motility.

They always require an intermediate host.

Which of the following statements about the "no-see-um" (biting gnats) that parasitize horses is the least accurate? When not feeding, the adults can be found near their aquatic or semi-aquatic breeding grounds. They are most active at midday, especially during the winter months. They serve as intermediate host for the nematode Onchocerca cervicalis. Clinical signs include alopecia, excoriations, and thickening of the skin.

They are most active at midday, especially during the winter months.

Which of the following statements about arthropods, as they apply to veterinary medicine, is least accurate? They may produce toxins or venomous substances. They may serve as definitive hosts for helminths and protozoans They may serve as vectors for bacteria and viruses. They may serve as the causal agent of disease

They may serve as definitive hosts for helminths and protozoans

Which word describes how closely results agree with the true quantitative value of a constituent? precision accuracy reliability control

accuracy

The suckers by which a true tapeworm holds on to its definite host are called: strobila acetabula bothria rostellum

acetabula

The life cycle stage of lice bound to the hair or feather shaft of the host is referred to as nit. redia. proglottid. cysticercus.

nit

Hymenolepis nana requires _______ as its intermediate host. cockroaches flour beetles fleas nothing

nothing

When being harbored by a/an _________ host, the parasite does not undergo any development. definitive intermediate paratenic reservoir

paratenic

According to Unit 1, which is not a minimal lab equipment needed? microscope refractometer microhematocrit centrifuge pipettes

pipettes

Which word best describes magnitude of random errors and reproducibility of measurements? accuracy precision control reliability

precision

Which word best describes the ability of a method to be accurate and precise? accuracy precision reliability control

reliability

Pentastomes are almost exclusively parasites of the reptilian _______ system. respiratory digestive musculoskeletal genitourinary

respiratory

Hymenolepis species are found in all of the following definitive hosts except: dogs. gerbils. ruminants. humans

ruminants

The predilection site of most adult tapeworms is the mucosal lining of the: large intestine small intestine stomach cecum

small intestine

All of the following statements about the life cycle of a true tapeworm are false except: after ingestion of the larval tapeworm by the definite host, development of the strobila precedes attachment to the predilection site. the metacestode is the larval tapeworm. only vertebrates can serve as an intermediate host. the larval tapeworm seldom is pathogenic to the intermediate host.

the metacestode is the larval tapeworm

All of the following are components of cestode anatomy except thorax. strobila. scolex. neck.

thorax.

Most ticks do not tolerate all of the following except: direct sunlight. dryness. excessive rainfall. total darkness

total darkness

The phylum Platyhelminthes includes the ________ and _________. hirudineans; nematodes hirudineans; cestodes trematodes; nematodes trematodes; cestodes

trematodes; cestodes