Final Exam Flashcards
Horses get this dz from possum poop
Sarcocystis neurona
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
Sarcocystis neurona
Common name of the parasite in this picture
Equine protozoal myeloencephalitis (EPM)
Section of nervous tissue from a horse showing the characteristic rosette of organisms associated with ____
S. neurona
Gelding with ataxia, atrophy of hind quarter muscles. His owner feeds him outside every morning and night.
Equine protozoal myeloencephalitis (EPM)
Focal muscle atrophy is characteristic of what dz in horses? it is The most commonly diagnosed infectious equine neurologic disease in America
EPM
This CNS damage occurs in what species that is exposed to contaminated possums
Horses
The arrows are pointing to ___- found in EPM
Multifocal areas of perivascular cuffs
Focal vasculitis (Large arrow) Hemorrhages (Small arrow) are seen in what parasite?
Sarcocystis neurona
These are various samples taken from what type of host for Sarcocystis neurona?
Aberrant host horse
The arrows are pointing to what parts of Neospora spp.
Sporocysts (2 arrows) oocyst (1 arrow)
Aborted fetus caused by ___
Neospora spp.
This is a cyst from fetus brain most consistently affected and encephalitis most common lesion. Name the parasite
Neospora spp.
Identify the 2 cysts
Toxoplasma (left) Neospora spp. (right)
Name the parasite and how you would diagnose this
Cryptosporidium spp direct smear or concentrates sugar soln fecal float
Cryptosporidium oocysts in bovine fecal smear. Name the site of infection
epithelial cells of the digestive tract • the respiratory tract
Name the parasite
Cryptosporidium spp.
Sample taken from a dog. Name the protozoa?
Hepatozoon spp.
Amblyomma tick pictured is responsible for passing ____ to the host
Hepatozoon spp.
Name tthe protozoa
Babesia canis
Trophozoites or merozoites in red blood cells of what host are shown here
Dog
Rhipicephalus sanguineus pass what protozoa to dogs
Babesia canis
You pull these ticks off a dog with Depression, anorexia, anemia, splenomegaly. What is your dx?
Babesia canis
A dog suffering from babesiosis got it from ____
Rhipicephalus sanguineus
Babesia is dx by ?
Trophozoites or merozoites in peripheral blood smear (Giemsa)
Name the protozoa
Babesia canis
This is smaller than Babesia canis. Name the protozoa
Babesia gibsoni
Name the parasite
Cytauxzoon felis
The host of Cytauxzoon felis
cats
Fever, anemia, icterus. Developing schizonts cause enlargement of infected cells. Occlusion of blood vessels – heart, liver, lungs. Rapid and fatal disease, south central USA
Cytauxzoon felis
Necropsy shows damage from which protozoa
Cytauxzoon felis
This black fly (buffalo nat) spread what protozoa
Leucocytozoon spp.
This is the life cycle for ___
Leucocytozoon spp.
• Organisms in blood or tissues is the dx for ?
Leucocytozoon spp.
Domestic and wild fowl Vectors: blackflies & biting midges
Leucocytozoon spp.
Adult sheep: Cool wet autumn, treated for adult nematodes, now it is late winter, diarrhea What parasite do u suspect?
Nematodirus
Taenia and Echinococcus treat dogs and cats with?
praziquantel
Damalinia ovis = most pathogenic
lice
What do all of these have in common?
Psoroptes – sheep scabies •
Sarcoptes on cattle •
Rhipicephalus (Boophilus) •
Cochliomyia hominivorax
reportable
purpose of parasite management
Maintain the parasites below the economic threshold • Slow down the development of parasite resistance to anthelmintics (anthelmintic resistance)
Treat based on ease of management • Leads toward resistance
strategic treatment
Unavoidable sometimes • Leads toward resistance
tactical treatment
Selective treatment for which parasite that causes anemia in sheep. Is this available in cows?
hamonchus
no
20-30% of animals harbor most of the worms
True or false
true
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
selective treatment
< 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
true
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?
small strongyles
2 Goals of tx and prevention in equines
Health and performance of equid - Preservation of anthelmintic efficacy
Foal origin of cyathostomin infection
true or false
false
Mare origin of cyathostomin infection
name seasonal parasites of horses
Flies Insects Ticks Lice* Mites*
*poor mngmnt/nourshisment
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?
internal
treatments for avian helminths
Piperazine Fenbendazole, levamisole & ivermectin
common st kitts parasites in cats
Trichuris spp. • Platynosomum sp. • Mammomonogamus sp. • Physaloptera sp. • Ancylostoma tubaeforme • Toxocara cati • Dipylidium and Taenia
These are examples of ?
parasiticides
