Practice questions- Parasitology 2nd semester: RUSVM

Pregunta 1 de 61

1

A number of older cows in a Texas herd are losing condition rapidly with a corresponding drop in milk production. Two pregnant animals have aborted.
Affected animals are off feed, uncoordinated and out of breath after exertion. On physical exam, affected cows have a rapid bouncing pulse and pale mucous membranes. One animal appears to be icteric with a temp of 105. Blood smear (pic). What is the most likely diagnosis?

Selecciona una de las siguientes respuestas posibles:

Eperythrozoon spp
Anaplasmosis
Leptospira icterohaemorrhagiae
Theileriosis
Babesia bigemina

Explicación

Pregunta 2 de 61

1

A flock from a turkey farm is presented with a mysterious illness. Several dead birds are notable. Mostly younger animals.
Sick turkeys are listless, with drooping wings, unkempt feathers, yellow droppings, and silk older birds are emancipated.
Necropsy shows a yellowish green caseous exudate in the ceca, cecal ulcerations and thickening of the cecal wall.
Picture of liver
What is the diagnosis?

Selecciona una de las siguientes respuestas posibles:

Necrotic enteritis
Histomonasis
Avian spirochetosis
Coronaviral enteritis of turkeys
Hemorrhagic enteritis of turkeys

Explicación

Pregunta 3 de 61

1

The most likely cause of diarrhea without intestinal blood loss in a 2 week old calf is which of the following?

Selecciona una de las siguientes respuestas posibles:

Sarcocystis cruzi
Bunostomum phlebotomum
Eimeria bovis
Toxoplasma gondii
Cryptosporidium parvum

Explicación

Pregunta 4 de 61

1

This bronchoscope image what's acquired from a 3 year old hound dog with a chronic cough, unresponsive to antibiotics that has recently increased in frequency and severity
(Image has nodules in bronchoscope). Which of the following choices is the most likely rule out?

Selecciona una de las siguientes respuestas posibles:

Nodules caused by a lungworm
Chronic eosinophilia bronchitis
Squamous cell carcinoma
Myobacterial tracheitis/bronchitis
Pneumonyssoides caninum granuloma

Explicación

Pregunta 5 de 61

1

What is the proper name for this parasite of pigs?

Selecciona una de las siguientes respuestas posibles:

Dioctophyma renale
Stephaanurus dentatus
Trichinella spiralis
Capillaria plica
Gnathostoma spinigerum

Explicación

Pregunta 6 de 61

1

Infection in a beef herd with Tritrichomonas foetus is characterized by which of the following?

Selecciona una de las siguientes respuestas posibles:

Anemia
Infertility
Wasting
Diarrhea
Neurologic disease

Explicación

Pregunta 7 de 61

1

During the necropsy of an 8 year old mixed breed dog from the southern United States, reactive granulomas in the esophagus containing bright red worms 40mm to 70mm long are found. What is the diagnosis?

Selecciona una de las siguientes respuestas posibles:

Ollulanus tricuspis
Haemonchus placei
Spirocerca lupi
Gastrophilus spp.
Physaloptera spp.

Explicación

Pregunta 8 de 61

1

Within a steers ear, on examination, there appear to be very large mites (about 1 cm in diameter). The parasites are subsequently identified as a stage of the soft tick Otobius megnini. The stages present in the ear of this steer are which of the following?

Selecciona una de las siguientes respuestas posibles:

Larvae, nymphs, and adults
Nymphs and adults
Nymphs and eggs
Eggs, larvae and nymphs
Larvae and nymphs

Explicación

Pregunta 9 de 61

1

On a cold February day in the northeastern US, the cow shown below is examined for pruritis and crusts around the perineum. A skin scrape shows some kind of mite with long legs and short unsegmented pedicles. What should be done next?

Selecciona una de las siguientes respuestas posibles:

Topical furazolidone
Amitraz SQ
Quarantine animal
Slaughter
Topical .25% crotoxyfos spray

Explicación

Pregunta 10 de 61

1

Obstruction ovis ovewinters as which of the following?

Selecciona una de las siguientes respuestas posibles:

Third-stage larvae in the frontal sinuses of sheep
Second-stage larvae in the frontal sinuses of sheep
Adults in lofts and attics
Eggs deposited on vegetation in sheep pastures
First-stage larvae in the nasal cavity of sheep and as pupae in soil

Explicación

Pregunta 11 de 61

1

Damalinia equi is a louse that infests horses. The eggs of this louse are most likely to be found which of the following locations?

Selecciona una de las siguientes respuestas posibles:

In the feces
Glued to the hairs
In water containers within the box stall
In the bedding of box stall
In soil surrounding the stable

Explicación

Pregunta 12 de 61

1

Skin scrapings of a lesion at the base of the tail of a cow reveal mites. The mites are identified as Chorioptes bovis, by which of the following?

Selecciona una de las siguientes respuestas posibles:

Long, jointed pedicles of the pretarsi
Long, nonjointed pedicles of the pretarsi
Short pedicles of the pretarsi
Elongate body
Lack of caruncles on the pretarsi

Explicación

Pregunta 13 de 61

1

A flock of ewes is experiencing abortion as a result of focal placentitis. The parasite that typically causes this lesion in sheep is which of the following?

Selecciona una de las siguientes respuestas posibles:

Trypanosomiasis ovis
Isospora felis
Eimeria ovinoidalis
Sarcocystis Tenella
Toxoplasma gondii

Explicación

Pregunta 14 de 61

1

An otherwise healthy rabbit keeps shaking his head and scratching incessantly. There is a brown crust coating the interior of both ears. What is the most likely diagnosis?

Selecciona una de las siguientes respuestas posibles:

Psoroptes cuniculi
Cheyletiella
Sarcoptes scabei
Taenia serialis
Otodectes cyanotis

Explicación

Pregunta 15 de 61

1

The most likely cause of diarrhea without intestinal blood loss in a 2 week old calf is which of the following?

Selecciona una de las siguientes respuestas posibles:

Sarcocystis cruzi
Bunostomum phlebotomum
Eimeria bovis
Toxoplasma gondii
Cryptosporidium parvum

Explicación

Pregunta 16 de 61

1

Necropsy of a horse reveals infection of the skeletal and cardiac muscle with Sarcocystis bertrami. Typical clinical signs of myositic infection (bradyzoite stage infection) with this parasite as with other species of Sarcocystis are:

Selecciona una de las siguientes respuestas posibles:

Muscle pain and loss of function
Inappetence and wasting
Diarrhea no dehydration
Central nervous system signs
Absent

Explicación

Pregunta 17 de 61

1

Converting evaluation of the efficacy of parasite control programs, which statement is least accurate?

Selecciona una de las siguientes respuestas posibles:

At 1-2 weeks after anthelmintic therapy, 20% of horses should be evaluated for nematode ova
Tapeworm ova are best detected using the Wisconsin technique
Fecal egg counts should be performed on all fecal samples that show eggs on fecal flotation
Fecal egg counts cannot predict the number of parasites a horse harbors
Pasture contamination can be considered low if fecal egg counts are below 50 eggs/g

Explicación

Pregunta 18 de 61

1

Concerning tapeworm infection which statement is least accurate?

Selecciona una de las siguientes respuestas posibles:

The common tapeworms of horses are Anoplocephala magna and Anoplocephala perfoliata
The life cycle involves snails as intermediate hosts
Tapeworms are more common in adults horses than foals
Clinical signs attributable to tapeworm infection include unthriftiness, intestinal ulceration, and intussusception
Pyrantel pamoate is the treatment of choice against Anoplocephala

Explicación

Pregunta 19 de 61

1

Which of the following is not associated with Parascaris equorum infection?

Selecciona una de las siguientes respuestas posibles:

weight loss
Coughing and nasal discharge
Lethargy
Slow weight gain
Protein-losing enteropathy

Explicación

Pregunta 20 de 61

1

In order of occurrence, the typical pattern of events in the life cycle of a coccidi an parasite, such as Eimeria organisms are:

Selecciona una de las siguientes respuestas posibles:

schizont, schizont, gametocyte, oocyst, sporocyt, sporozoite
Oocyst, gametocyte, schizont, schizont, sporozoite, sporocyst
Oocyst, sporocyst, sporozoite, gametocyte, schizont, schizont
Gametocyte, schizont, schizont, oocyst, sporocyst, sporozoite
Schizont, schizont, oocyst, gametocyte, sporocyst, sporozoite

Explicación

Pregunta 21 de 61

1

Which procedure is required to control house flies and stable flies?

Selecciona una de las siguientes respuestas posibles:

Frequent spraying of insecticides around barns
Applying repellents and insecticidal sprays to horses
Installing electric light traps around barns
Proper disposal of hay and manure
Administering oral insecticides

Explicación

Pregunta 22 de 61

1

Concerning infestations of ectoparasites in horses, which statement is least accurate?

Selecciona una de las siguientes respuestas posibles:

Lice infestations most commonly involve the biting louse (damalinia equi) and the sucking louse (Haematopinus asini). Infestations can occur at any time but tend to be most common in the winter
Scabies in horses usually begins on the head, Chorioptes infestations begin on the legs and Psoroptes infestations begin on the trunk
Culicoides hypersensitivity is one of the most common fly-bite dermatoses of horses . In general, the head, tail, and centrum are affected; pruritus may be generalized in severe cases
Onchocerciasis can cause cutaneous and ocular lesions. Cutaneous lesions are represented by alopecia, ulcerations, depigmentation, and scaling. The face, neck, and ventral midline are the most commonly infested. The filariasis nematode is transmited by Musca domestica
The treatment of choice for equine mite and lice infestations is ivermectin

Explicación

Pregunta 23 de 61

1

Which of the following diseases is NOT transmitted by hard ticks? (Ixodidae)

Selecciona una de las siguientes respuestas posibles:

Babesiosis
Ehrilichiosis
Theileriosis
Lyme disease
Rift Valley fever

Explicación

Pregunta 24 de 61

1

In horses, the larvae of Gasterophilus intestinalis spend more time within the oral mucosa. Ultimately, however, they arrive in the stomach where they complete their development. The total average stay of G. intestinalis within a horse is approximatley which of the following?

Selecciona una de las siguientes respuestas posibles:

2 weeks
2 months
3 months
10 months
23 months

Explicación

Pregunta 25 de 61

1

This Holstein cow has submandibular Adela, slightly pale mucus membranes, and reduced milk production. CBC shows mild anemia, GGT is elevated. Fecal examination shows a few oval, operculated golden brown eggs. Which one of the following choices is the most likely diagnosis?

Selecciona una de las siguientes respuestas posibles:

Traumatic reticuloperitonitis
High-mountain disease
Liver abscesses
Fasciolosis
Paramphistomosis

Explicación

Pregunta 26 de 61

1

Which organisms is depicted in the images?

Selecciona una de las siguientes respuestas posibles:

Dermatitis hominis
Cochliomyia hominivorax
Cuterebra spp.
Coenurus cerebralis
Onchocerca cervicalis

Explicación

Pregunta 27 de 61

1

Concerning onchocerciasis, which statement is least accurate?

Selecciona una de las siguientes respuestas posibles:

Cutaneous onchocerciasis is characterized by alopecia nod depigmentation
Adult Onchocerca cervicalis worms live in the nuchal ligament
Culicoides gnats ingest the microfilariae of Onchocerca in the dermis
Ivermectin therapy kills both microfilariae and the adult Onchocerca cervicalis worms
Lesions can appear on the face, chest, withers and ventral midline

Explicación

Pregunta 28 de 61

1

If the following image is seen on necropsy, what would be recommended as a treatment plan for the remaining group of pigs?

Selecciona una de las siguientes respuestas posibles:

There is no effective treatment
Morantel PO
Lincomycin IM
Decrease non-protein nitrogen in diet
Antihelminthics

Explicación

Pregunta 29 de 61

1

The following image is seen on a blood smear from a range cow from south Texas near the Mexican border. The cow has 2 day history of high fever, anorexia, depression and "redwater" (red urine-hemoglobinuria). What is the diagnosis?

Selecciona una de las siguientes respuestas posibles:

Babesiosis
Bacillary Hemoglobinuria
Leptospirosis
Anaplasmosis
Trypanosomiasis

Explicación

Pregunta 30 de 61

1

A 2 week old calf is presented that is dehydrated and almost emancipated from weight loss. She has a 1 week history of water, foamy diarrhea and exhibits tenesmus during examination. The calf is the only sick one in the mixed group of calves that range from 3 weeks to 2 months of age. What is the diagnosis?

Selecciona una de las siguientes respuestas posibles:

Coronavirus
Coccidiosis
Colibacillosis
Ostertagiasis
Cryptosporidiosis

Explicación

Pregunta 31 de 61

1

Cutaneous habronemasis (summer sores) is a:

Selecciona una de las siguientes respuestas posibles:

disease of the lymphatics of the extremeties
Skin disease of the ventral midline, transmitted by midges
Seasonal granulomatous skin disease transmitted by house flies and stable flies
Seasonal granulomatous skin dense transmitted by Culicoides gnats
Skin dense of the face transmitted by Culicoides gnats

Explicación

Pregunta 32 de 61

1

The concept of "spring rise" refers to which of the following?

Selecciona una de las siguientes respuestas posibles:

Increased numbers of larvae on pasture in the spring
Accelerated development from egg to larvae under spring conditions
Increased egg output by ewes due to continued development of arrested larvae
Development of increased Hemonchus-specific antibody levels during spring
Movement of larvae that have overwintered in the soil up onto freshly growning grass in the spring

Explicación

Pregunta 33 de 61

1

Necropsy of a horse reveals a 5cm hemispheric swelling in the stomach at the level of the Margo plicatus. The swelling contains necrotic material and a large number of worms about 1cm long. The females lay small, thin-shelled larvated eggs. The worm within this lesion is most likely which of the following?

Selecciona una de las siguientes respuestas posibles:

Draschia megastoma
Habronema muscle
Trichostrongylus axei
Strongyloides westeri
Probstmayria vivipara

Explicación

Pregunta 34 de 61

1

Species of Nematodirus differ from other trichostrongyloid nematodes in which of the following?

Selecciona una de las siguientes respuestas posibles:

Their larvae develop into infective stage within the egg
The adult worms live in the lungs
The adult worms live in the small intestine
Developing larvae migrate through the liver and lungs
They require an intermediate host

Explicación

Pregunta 35 de 61

1

Concerning fecal examination for parasite ova in horses, which statement is most accurate?

Selecciona una de las siguientes respuestas posibles:

Fecal egg counts correlate well with the severity of clinical signs
Parasitism can be ruled out as a cause of chronic diarrhea in horses when fecal egg counts are less than 500 eggs/g feces
Parasitism can be ruled out as a cause of chronic diarrhea in horses when fecal examination is negative for parasite ova
Examination of feces from several horses in the same environment for parasite ova is useful for dertermining the efficacy of the parasite control program
Parasitism can be ruled out as a cause of diarrhea in horses when fecal egg counts are less than 200 eggs/g feces

Explicación

Pregunta 36 de 61

1

Which choice is associated with osteosarcoma and hypertrophic osteopathy?

Selecciona una de las siguientes respuestas posibles:

Spirocerca lupi
Coccidiodomycosis
Habronema spp.
Blastomycosis
Ollulanus tricuspis

Explicación

Pregunta 37 de 61

1

A smear of blood collected from a newborn foal contains microfilariae identified as those of Setaria equina. If the microfilariae in the foal are not killed by anthelmintic treatment, they will:

Selecciona una de las siguientes respuestas posibles:

Develop to adults within the abdominal cavity
Develop to infective larvae in the dermis
Cause "summer sores" in the saddle area
Die from natural causes without serious consequences to the foal
Migrate to the brain causing serious neurologic disease

Explicación

Pregunta 38 de 61

1

In horses, the larvae of Strongylus vulgaris are the pathogenic stage of this parasite. Damage is caused by migration of the larvae within the:

Selecciona una de las siguientes respuestas posibles:

Bile canaliculi of the liver
Islet cells of the pancreas
Intima of the cranial mesenteric arteries
Lymphatic vessels in the small intestinal wall
Meninges of the spinal cord

Explicación

Pregunta 39 de 61

1

Which parasite can cause cutaneous larva migrans in people?

Selecciona una de las siguientes respuestas posibles:

Habronema spp
Trichuris spp
Spirocerca sp
Gastrophilus spp
Ancylostoma spp

Explicación

Pregunta 40 de 61

1

Concerning larval cyathostomiasis, which statement is least accurate?

Selecciona una de las siguientes respuestas posibles:

Larval cyathostomiasis is most common in young horses but can occur in horses of all ages
Clinical signs of cyathostomiasis may include: diarrhea, colic, weight loss, dependent edema, and delayed shedding of the winter hair coat
The disease is seasonal and associated with emergence of larvae from the gut wall after hypobiosis
Adult cyathostomiasis does not usually cause diarrhea but can contribute to protein losing eneropathy
Ivermectin and some benzimidazole dewormers are the only anthelmintics effective against third-stage larvae encysted in the gut wall

Explicación

Pregunta 41 de 61

1

Infection of a horse with large numbers of Oxyuris equi is likely to lead to:

Selecciona una de las siguientes respuestas posibles:

Verminous arteritis
Gastritis
Acute diarrhea in late winter and spring
Bare patches around the tail and perineum
Chronic bloody diarrhea

Explicación

Pregunta 42 de 61

1

Which of the following is correct concerning the larva that hatches after an egg of Parascaris equorum is ingested by the host?

Selecciona una de las siguientes respuestas posibles:

It develops entirely within the intestinal lumen
It undergoes early development in the intestinal wall before migrating back to the small intestine
It migrates to the liver and throughout the abdominal cavity before migrating back to the small intestine
It migrates from the liver to the lungs before returning to the small intestine
It devotes in the colon and then migrates back to the small intestine e

Explicación

Pregunta 43 de 61

1

Necropsy of a horse reveals the intestine to contain a very large number of white tapeworms at the ileocecal valve, though no eggs were detected in the feces enforce necropsy. This parasite is most likely which of the following?

Selecciona una de las siguientes respuestas posibles:

Taenia hydatigena
Echinococcus granulosus
Moniezia expansa
Anoplocephala perfoliata
Thysanosoma actinioides

Explicación

Pregunta 44 de 61

1

A large cyst (8 cm in diameter) is found in the lung of a cow in Utah. The cyst contains thousands of microscopic tapeworm scolices. This cyst represents which of the following?

Selecciona una de las siguientes respuestas posibles:

A sparganum
A cysticercus
A coenurus
A hydatid
A cystercercoid

Explicación

Pregunta 45 de 61

1

Which of the following is the major clinical sign of hemonchosis in sheep?

Selecciona una de las siguientes respuestas posibles:

Pale mucus membranes
Diarrhea
Hypoproteinemia
Constipation
Bloody diarrhea

Explicación

Pregunta 46 de 61

1

In a calf that died from severe diarrhea associated with high serum pepsinogen levels, necropsy reveals in the rumen, reticulum and omasum to be full of feed, while the remainder of the alimentary tract is virtually empty. The mucosa of the abomasum is covered with gray-white 3-5mm nodules, each of which contains a small worm. The parasite responsible for this type of lesion in cattle is which of the following?

Selecciona una de las siguientes respuestas posibles:

Haemonchus placei
Trichostrongylus axei
Ostertagia ostertagi
Menatodirus helvetianus
Bunostomum phlebotomum

Explicación

Pregunta 47 de 61

1

A skin lesion on the face of a horse contains large numbers of eosinophils and nematode larvae and improves markedly after ivermectin therapy. The larvae are probably those of which of the following?

Selecciona una de las siguientes respuestas posibles:

Habronema muscae
Strongylus vulgaris
Trichostrongylus axei
Strongyloides westeri
Probstmayria vivipara

Explicación

Pregunta 48 de 61

1

Infection of a horse with large numbers of Oxyuris equi is likely to lead to which of the following?

Selecciona una de las siguientes respuestas posibles:

Verminous arteritis
Gastritis
Acute diarrhea in late winter and spring
Bare patches around the tail and perineum
Chronic bloody diarrhea

Explicación

Pregunta 49 de 61

1

Young beef cattle in Mississippi develop anemia and anasarca during a wet period of the summer. None of the animals shows any signs of diarrhea and some seem constipated. One animal dies and necropsy reveals numerous red and white worms, 20-3-mm long, within the abomasum. The worm most likely responsible for the disease in these cattle is which of the following?

Selecciona una de las siguientes respuestas posibles:

Haemonchus placei
Trichostrongylus axei
Ostertagia ostertagi
Nematodirus helvetianus
Bunostomum phlebotomum

Explicación

Pregunta 50 de 61

1

A mite that has long, jointed pedicles and is occasionally found in the ears of llamas is a species of which of the following?

Selecciona una de las siguientes respuestas posibles:

Sarcoptes
Psoroptes
Chorioptes
Otodectes
Knemidokoptes

Explicación

Pregunta 51 de 61

1

Winter coccidiosis in cattle is characterized by which of the following?

Selecciona una de las siguientes respuestas posibles:

Anemia and icterus
Wasting and myositis
Diarrhea and dysentery
Cardiac failure
Fever and loss of hair at the base of the tail

Explicación

Pregunta 52 de 61

1

Which parasite has been associated with hypoadrenocorticism-like syndrome and has been suggested as a cause for cecocolic intussusception in dogs?

Selecciona una de las siguientes respuestas posibles:

Ancylostoma caninum
Physaloptera spp
Trichuris Vulpis
Toxocara canis
Spirocerca lupi

Explicación

Pregunta 53 de 61

1

A 2- year old heifer is presented who died the night before.
She was stunted compared to her herdmates, and had a 3 week history of poor appetite, unthriftiness, and diarrhea.
Necropsy reveals that the abomasum is edematous and covered in small umbilicated nodules (Moroccan leather appearance).
Several other younger cows in this Spring-calving herd look unthriftiness and have diarrhea too.
What is the plan of action?

Selecciona una de las siguientes respuestas posibles:

Cull the sick cows, keep horses of the same pasture 3 months
Treat the affected heifers with Albendazole
Treated affected heifers with Ivermectin, repeat in 6 months
Treat herd with Amprolium, repeat every 5 weeks
Dewormers cows post calving, calves by midsummer, all stock in fall

Explicación

Pregunta 54 de 61

1

Donkeys infected with Dictyocaulus arnfieldi are considered a threat to horses because they contaminate the environment with larvae. Grazing horses acquire lungworm infections by ingesting:

Selecciona una de las siguientes respuestas posibles:

Free living infective larvae
Infective larvae in snail intermediate host
Infective larvae in an oribatid mite

Explicación

Pregunta 55 de 61

1

In horses, small strongyles (cyathostomiasis) can cause disease when present in large numbers or apparently when there is a mass emergence of arrested larvae. In which of the following are the hypobiotic larvae (arrested larvae) of these worms located in the parasitized horse?

Selecciona una de las siguientes respuestas posibles:

The lungs
The cranial mesenteric arteries
Caseous nodules in the small bowel
The wall of the cecum and colon
The wall of the stomach

Explicación

Pregunta 56 de 61

1

The pot bellied pig in this picture is infected with Trichinella spiralis. How is this parasite in pigs transmitted?

Selecciona una de las siguientes respuestas posibles:

Ingestion of encysted larvae in the muscle
Ingestion of earthworms, the IH
Ingestion of encysted larvae in the urine
Ingestion of encysted larvae in the feces
Ingestion of snails, the IH

Explicación

Pregunta 57 de 61

1

On fecal examination of a 7 year old dog, this organism is evident. Which of the following is this egg associated with?

Selecciona una de las siguientes respuestas posibles:

Whipworm
Roundworm
Tapeworm
Fluke

Explicación

Pregunta 58 de 61

1

Concerning the parasitic portion of the life cycle of Parascaris equorum, which statement is least accurate?

Selecciona una de las siguientes respuestas posibles:

The life cycle begins with ingestion of infective eggs
Third-stage larvae migrate via the mesenteric artery to the liver in the first week after infection
Larvae migrate to the lungs about 10 days after infection
Larvae migrate within the lungs for about 1 week before proceeding to the major airways
Most larvae arrive in the small intestine 2-3 weeks after ingestion

Explicación

Pregunta 59 de 61

1

The prepatent period for Parascaris equorum infection is?

Selecciona una de las siguientes respuestas posibles:

75-100 days
65-120 days
55- 65 days
35-50 days
115 to 135 days

Explicación

Pregunta 60 de 61

1

Cattle become infected with Ostertagia ostertagi by which of the following means?

Selecciona una de las siguientes respuestas posibles:

Ingestion of infective larvae
Ingestion of infected aribatid mites
Transmammary migration of infective larvae
Transplacental migration of infective larvae
Ingestion of infective larvae encysted in water plants

Explicación

Pregunta 61 de 61

1

A 4 year old standard bred mare develops paralysis of the right side of its face. Despite various treatments, the disease progresses to lameness and paresis and the owner elects euthanasia. Necropsy reveals lesions in the brain and spinal cord containing Protozoal organisms. Which of the following is the most likely cause of these findings?

Selecciona una de las siguientes respuestas posibles:

Trypanosomiasis equiperdum
Babesia caballi
Klossiella equi
Sarcocystis neurona
Besnoitia jelisoni

	Creado por Kathryn George hace más de 7 años

Test sobre Practice questions- Parasitology 2nd semester: RUSVM , creado por Kathryn George el 04/08/2017.

Practice questions- Parasitology 2nd semester: RUSVM

Pregunta 1 de 61

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 61

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 61

The most likely cause of diarrhea without intestinal blood loss in a 2 week old calf is which of the following?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 4 de 61

This bronchoscope image what's acquired from a 3 year old hound dog with a chronic cough, unresponsive to antibiotics that has recently increased in frequency and severity (Image has nodules in bronchoscope). Which of the following choices is the most likely rule out?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 5 de 61

What is the proper name for this parasite of pigs?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 6 de 61

Infection in a beef herd with Tritrichomonas foetus is characterized by which of the following?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 61

During the necropsy of an 8 year old mixed breed dog from the southern United States, reactive granulomas in the esophagus containing bright red worms 40mm to 70mm long are found. What is the diagnosis?

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Pregunta 8 de 61

Within a steers ear, on examination, there appear to be very large mites (about 1 cm in diameter). The parasites are subsequently identified as a stage of the soft tick Otobius megnini. The stages present in the ear of this steer are which of the following?

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Pregunta 9 de 61

On a cold February day in the northeastern US, the cow shown below is examined for pruritis and crusts around the perineum. A skin scrape shows some kind of mite with long legs and short unsegmented pedicles. What should be done next?

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Pregunta 10 de 61

Obstruction ovis ovewinters as which of the following?

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Pregunta 11 de 61

Damalinia equi is a louse that infests horses. The eggs of this louse are most likely to be found which of the following locations?

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Pregunta 12 de 61

Skin scrapings of a lesion at the base of the tail of a cow reveal mites. The mites are identified as Chorioptes bovis, by which of the following?

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Pregunta 13 de 61

A flock of ewes is experiencing abortion as a result of focal placentitis. The parasite that typically causes this lesion in sheep is which of the following?

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Pregunta 14 de 61

An otherwise healthy rabbit keeps shaking his head and scratching incessantly. There is a brown crust coating the interior of both ears. What is the most likely diagnosis?

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Explicación

Pregunta 15 de 61

The most likely cause of diarrhea without intestinal blood loss in a 2 week old calf is which of the following?

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Pregunta 16 de 61

Necropsy of a horse reveals infection of the skeletal and cardiac muscle with Sarcocystis bertrami. Typical clinical signs of myositic infection (bradyzoite stage infection) with this parasite as with other species of Sarcocystis are:

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Pregunta 17 de 61

Converting evaluation of the efficacy of parasite control programs, which statement is least accurate?

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Explicación

Pregunta 18 de 61

Concerning tapeworm infection which statement is least accurate?

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Pregunta 19 de 61

Which of the following is not associated with Parascaris equorum infection?

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Pregunta 20 de 61

In order of occurrence, the typical pattern of events in the life cycle of a coccidi an parasite, such as Eimeria organisms are:

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This bronchoscope image what's acquired from a 3 year old hound dog with a chronic cough, unresponsive to antibiotics that has recently increased in frequency and severity
(Image has nodules in bronchoscope). Which of the following choices is the most likely rule out?