Final Exam

Question 1

Horses get this dz from possum poop

Answer 1

Sarcocystis neurona

Question 2

You want to control the population of this animal in horse barns and make sure they are not gettin in horse food because horses can get what dz from them

Answer 2

Sarcocystis neurona

Question 3

Common name of the parasite in this picture

Answer 3

Equine protozoal myeloencephalitis (EPM)

Question 4

Section of nervous tissue from a horse showing the characteristic rosette of organisms associated with ____

Answer 4

S. neurona

Question 5

Gelding with ataxia, atrophy of hind quarter muscles. His owner feeds him outside every morning and night.

Answer 5

Equine protozoal myeloencephalitis (EPM)

Question 6

Focal muscle atrophy is characteristic of what dz in horses? it is The most commonly diagnosed infectious equine neurologic disease in America

Answer 6

EPM

Question 7

This CNS damage occurs in what species that is exposed to contaminated possums

Answer 7

Horses

Question 8

The arrows are pointing to ___- found in EPM

Answer 8

Multifocal areas of perivascular cuffs

Question 9

Focal vasculitis (Large arrow) Hemorrhages (Small arrow) are seen in what parasite?

Answer 9

Sarcocystis neurona

Question 10

These are various samples taken from what type of host for Sarcocystis neurona?

Answer 10

Aberrant host horse

Question 11

The arrows are pointing to what parts of Neospora spp.

Answer 11

Sporocysts (2 arrows) oocyst (1 arrow)

Question 12

Aborted fetus caused by ___

Answer 12

Neospora spp.

Question 13

This is a cyst from fetus brain most consistently affected and encephalitis most common lesion. Name the parasite

Answer 13

Neospora spp.

Question 14

Identify the 2 cysts

Answer 14

Toxoplasma (left) Neospora spp. (right)

Question 15

Name the parasite and how you would diagnose this

Answer 15

Cryptosporidium spp direct smear or concentrates sugar soln fecal float

Question 16

Cryptosporidium oocysts in bovine fecal smear. Name the site of infection

Answer 16

epithelial cells of the digestive tract • the respiratory tract

Question 17

Name the parasite

Answer 17

Cryptosporidium spp.

Question 18

Sample taken from a dog. Name the protozoa?

Answer 18

Hepatozoon spp.

Question 19

Amblyomma tick pictured is responsible for passing ____ to the host

Answer 19

Hepatozoon spp.

Question 20

Name tthe protozoa

Answer 20

Babesia canis

Question 21

Trophozoites or merozoites in red blood cells of what host are shown here

Answer 21

Dog

Question 22

Rhipicephalus sanguineus pass what protozoa to dogs

Answer 22

Babesia canis

Question 23

You pull these ticks off a dog with Depression, anorexia, anemia, splenomegaly. What is your dx?

Answer 23

Babesia canis

Question 24

A dog suffering from babesiosis got it from ____

Answer 24

Rhipicephalus sanguineus

Question 25

Babesia is dx by ?

Answer 25

Trophozoites or merozoites in peripheral blood smear (Giemsa)

Question 26

Name the protozoa

Answer 26

Babesia canis

Question 27

This is smaller than Babesia canis. Name the protozoa

Answer 27

Babesia gibsoni

Question 28

Name the parasite

Answer 28

Cytauxzoon felis

Question 29

The host of Cytauxzoon felis

Answer 29

cats

Question 30

Fever, anemia, icterus. Developing schizonts cause enlargement of infected cells. Occlusion of blood vessels – heart, liver, lungs. Rapid and fatal disease, south central USA

Answer 30

Cytauxzoon felis

Question 31

Necropsy shows damage from which protozoa

Answer 31

Cytauxzoon felis

Question 32

This black fly (buffalo nat) spread what protozoa

Answer 32

Leucocytozoon spp.

Question 33

This is the life cycle for \_\_\_

Answer 33

Leucocytozoon spp.

Question 34

• Organisms in blood or tissues is the dx for ?

Answer 34

Leucocytozoon spp.

Question 35

Domestic and wild fowl Vectors: blackflies & biting midges

Answer 35

Leucocytozoon spp.

Question 36

Adult sheep: Cool wet autumn, treated for adult nematodes, now it is late winter, diarrhea What parasite do u suspect?

Answer 36

Nematodirus

Question 37

Taenia and Echinococcus treat dogs and cats with?

Answer 37

praziquantel

Question 38

Damalinia ovis = most pathogenic

Answer 38

lice

Question 39

What do all of these have in common? Psoroptes – sheep scabies • Sarcoptes on cattle • Rhipicephalus (Boophilus) • Cochliomyia hominivorax

Answer 39

reportable

Question 40

purpose of parasite management

Answer 40

Maintain the parasites below the economic threshold • Slow down the development of parasite resistance to anthelmintics (anthelmintic resistance)

Question 41

Treat based on ease of management • Leads toward resistance

Answer 41

strategic treatment

Question 42

Unavoidable sometimes • Leads toward resistance

Answer 42

tactical treatment

Question 43

Selective treatment for which parasite that causes anemia in sheep. Is this available in cows?

Answer 43

hamonchus no

Question 44

20-30% of animals harbor most of the worms True or false

Answer 44

true

Question 45

Treatment of a proportion of the flock or herd based on certain criteria, while leaving the rest of the animals untreated • Criteria: FAMACHA©, FEC, etc

Answer 45

selective treatment

Question 46

\< 1y of age: 3-4 fecals/y • \> 1 y of age: 1-2 fecals/y • HW antigen and HW mff: 1-2x/y • Endemic regions annual testing for vector-transmitted pathogens • Consider local parasite prevalence and individual pet lifestyle factors • Adapt recommendations for emerging parasite threats true or false

Answer 46

true

Question 47

Northern temperate climate • Larvae arrest during winter • Emerge, adults spring • Egg counts increase in spring • Southern temperate climates • Larvae encyst during summer • Transmission occurs during winter this is the epidemiology for which equine parasite?

Answer 47

small strongyles

Question 48

2 Goals of tx and prevention in equines

Answer 48

Health and performance of equid - Preservation of anthelmintic efficacy

Question 49

Foal origin of cyathostomin infection true or false

Answer 49

false Mare origin of cyathostomin infection

Question 50

name seasonal parasites of horses

Answer 50

Flies Insects Ticks Lice\* Mites\* \*poor mngmnt/nourshisment

Question 51

Take away essential nutrients  Injury to vital organs  Decreased feed efficiency and lowered growth rates All results of internal or external parasites in swine/avian?

Answer 51

internal

Question 52

treatments for avian helminths

Answer 52

Piperazine Fenbendazole, levamisole & ivermectin

Question 53

common st kitts parasites in cats

Answer 53

Trichuris spp. • Platynosomum sp. • Mammomonogamus sp. • Physaloptera sp. • Ancylostoma tubaeforme • Toxocara cati • Dipylidium and Taenia

Question 54

These are examples of ?

Answer 54

parasiticides