Exam I Flashcards
The name of a parasite that infects dogs and cats all around the world. Indirect life cycle, L3 infective, adults are in the stomach, paratenic hosts include birds/snakes, with eggs that are more oval than elongated as well as hard to float.
Physaloptera
This parasite can cause bone changes such as osteosarcomas, spondylosis, and osteopathy of long bones in addition to esophageal granulomas. Indirect life cycle with a dung beetle as an intermediate host. What is it and what is the host?
Spirocerca lupi
Carnivores like dogs and big cats
What are the main characteristics of parasites in the Spirurida Order?
Indirect life cycles
Insect Intermediate host
What does mff stand for?
Microfilariae
What is the scientific name for heartworm and what are the hosts? Location in host? Intermediate host? Infective stage?
Dirofilaria immitis
Dogs, cats, and other mammals
Mosquitoes
L3
When would you use a Baermann? In which parasites would a Baermann be useful during diagnosis?
When you want to recover larval stages; larvae can’t swim so they sink to bottom.
Filaroides (Oslerus) osleri Dictyocaulus viviparous Dictyocaulus filarial Muellerius spp. Aelurostrongylus abstrusus
Which parasites have an infective stage of L3 inside of an egg?
Toxocara
Ascaris
Parascaris
Which parasites have an infective stage of L2 inside of an egg?
Ascaridia
Heterakis
Which parasites have larvae with a kinked tail?
Filaroides (Oslerus) osleri (dogs) Aelurostrongylus abstrusus (cats) Muellerius spp. (sheep/goats)
Which parasites have larvae with a straight tails?
Dictyocaulus viviparous
Dictyocaulus filarial
What if the difference between saying coccidiasis versus coccidiosis?
The -iasis implies that the parasite is present while the -iosis implies that the parasite is causing disease.
What stage parasite do you usually look for when performing a necropsy?
The adult
Which parasites have an infective stage as an egg with an infective larvae?
The ascarids
Toxocara canis Toxocara cati Toxascaris leonina Parascaris equorum Ascaris Suum Ascaridia spp.
Which two parasites are associated with weanling calves?
Cooperia spp. and Ostertagia Ostertagi
Which parasites can cause larva migrans cutaneous in humans?
Ancylostoma braziliense
Ancylostoma caninum
Uncinaria stenocephala
Which parasites can cause larva migrans visceral in humans?
Toxocara canis
Toxocara cati
Baylisascaris procyonis
Which parasites in ruminants have adults that do not produce many eggs?
Trichostrongylus spp.
Ostertagia Ostertagia
Nematodirus spp.
In which large animal parasites is it easy to see the adult stage during necropsy?
Haemonchus
Oesophagostomum
Why is it difficult to diagnose Ostertagiasis in cattle during larval arrest?
Arrested L4 can not be seen or sampled.
What are the names of the five different chemical groups of broad-spectrum anthelmintics?
Benzimidazoles Imidazothiazoles Macrocyclic lactones Amino-acetonitrile derivatives Spiroindoles
Which parasites of sheep and goats are very resistant to anthelmintics?
Haemonchus contortus
Trichostrongylus spp.
Ostertagia spp.
What kind of test can be done in order to determine the gravity of resistance in a parasite population? Explain the test. How would you get the actual count of eggs?
(FECRT) Fecal egg count reduction test which measures the likelihood of resistance.
Mcmaster.
A control and a treatment group are created from the feces of 20 randomly selected animals. Samples are collected before and after treatment. Pre and post egg counts are compared and resistance is suspected if reduction output after dosing is less than 95%.
(Pre treatment FEC- Post treatment FEC) divided by Pre Treatment FEC ALL multiplied by 100.
What five points are part of the five point check? What is this used for?
It is used for selective treatment ( treating high shedding, suffering animals only) and trains farmers to look for parasite infections.
- FAMACHA
- Body condition score
- DAG
- Bottle Jaw
- Nose Bots in sheep/ Hair and Coat in goats
T/F High shedding of eggs always equal disease.
False
