Veterinary Parasitology

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Questions and Answers

What is the main goal of studying veterinary parasitology?

To promote food safety

To become fluent in the language of veterinary parasitology (correct)

To prevent and control zoonotic diseases

To understand the human-animal bond

What is the term for a parasite that has a different host for different stages of its life cycle?

Facultative parasite

Euryxenous parasite (correct)

Monoxenous parasite

Homoxenous parasite

What is the term for a parasite that lives on the outside of its host?

Aberrant parasite

Endoparasite

Incidental parasite

Ectoparasite (correct)

What is the term for the relationship between two organisms in which one benefits and the other is harmed?

Parasitism Signup and view all the answers

What is the outermost layer of a nematode's body?

Cuticle Signup and view all the answers

What is the function of the somatic muscular layer in a nematode?

To enable movement Signup and view all the answers

What is the term for the process of using the Linnaean classification scheme to identify organisms?

Classification scheme Signup and view all the answers

What is the purpose of the cervical alae?

To modify the external cuticle Signup and view all the answers

What is the term for a chemical used to kill fungi?

Fungicides Signup and view all the answers

What is the name of the structures associated with the copulatory bursa?

Spicules Signup and view all the answers

What is the term for the process of infesting a host with parasites?

Infestation Signup and view all the answers

What is the term for the relationship between two organisms in which one benefits and the other is not affected?

Commensalism Signup and view all the answers

What is the layer beneath the cuticle responsible for?

Secreting the cuticle Signup and view all the answers

What is the shape of some species of nematodes?

Spherical Signup and view all the answers

What is the name of the structures that project from the copulatory bursa?

Bursal rays Signup and view all the answers

What is the function of the hypodermis?

To secrete the cuticle Signup and view all the answers

What is the kingdom that contains platyhelminths, nematodes, acanthocephalans, and arthropods?

Kingdom: Animalia Signup and view all the answers

Which phylum does the dog belong to?

Phylum: Chordata Signup and view all the answers

What is the purpose of the tables provided in the book?

To view parasites by their hosts Signup and view all the answers

What is the name of the classification scheme used to organize living organisms?

Linnaean classification scheme Signup and view all the answers

What is the primary concern of veterinary parasitology?

True parasites of domesticated animals Signup and view all the answers

How many species of warm-blooded vertebrates can Toxoplasma gondii infect?

Over 300 species Signup and view all the answers

What is the only host where the sexual stages of Toxoplasma gondii occur?

Felines Signup and view all the answers

Which kingdom contains protozoans?

Kingdom: Protista Signup and view all the answers

Which of the following kingdoms includes fungi?

Fungi Signup and view all the answers

What is the term for the study of parasites?

Parasitology Signup and view all the answers

What is the class of the species 'Canis familiaris'?

Mammalia Signup and view all the answers

Which of the following is a characteristic of a parasite?

Lives in a host in which it does not normally live Signup and view all the answers

What is the term for a parasite that wanders into an organ in which it does not normally live?

Phoresis Signup and view all the answers

What is the purpose of learning the scientific names, common names, hosts, and key identifying features of parasites?

To build a greater proficiency in veterinary parasitology Signup and view all the answers

What is the significance of the classification scheme in veterinary parasitology?

It is a framework for building a greater proficiency in veterinary parasitology Signup and view all the answers

What is the role of veterinary technicians in veterinary parasitology?

To continually improve professional knowledge and competence Signup and view all the answers

What is the characteristic of the egg type of Ancylostoma caninum, the hookworm of dogs?

Contains a morula stage within the eggshell Signup and view all the answers

What is the name of the nematode egg type produced by Toxocara canis?

Ascaroid type Signup and view all the answers

Which type of nematode larva is characterized by a kinked-tail shape?

Lungworm Signup and view all the answers

What is the reproductive strategy of an adult female nematode?

Oviparous Signup and view all the answers

What is the characteristic of whipworm eggs?

Produced every third day Signup and view all the answers

What is the name of the nematode egg type produced by Haemonchus contortus?

Trichostrongyle type Signup and view all the answers

Which type of nematode larva is also known as the prelarval stage?

Microfilariae Signup and view all the answers

Why is it important to consider the size and composition of nematode eggs and larvae?

To render a diagnosis Signup and view all the answers

Study Notes

The Language of Veterinary Parasitology

Veterinary parasitology is concerned with two kingdoms: Animalia and Protista.
The kingdom Animalia contains platyhelminths (flatworms), nematodes (roundworms), acanthocephalans (thorny-headed worms), annelids (leeches), and arthropods (insects, mites, ticks, spiders, and other creatures with jointed appendages).
The kingdom Protista contains protozoans (unicellular organisms).

Classification Scheme

The Linnaean classification scheme is used to classify organisms.
The scheme includes the following taxonomic ranks: Kingdom, Phylum, Subphylum, Class, Order, Family, Genus, and Species.
The classification scheme for the dog is: Kingdom: Animalia, Phylum: Chordata, Subphylum: Vertebrata, Class: Mammalia, Order: Carnivora, Family: Canidae, Genus: Canis, Species: familiaris.

Terminology

Aberrant parasite: a parasite that wanders into an organ in which it does not normally live.
Ectoparasite: a parasite that lives on the external surface of the host.
Endoparasite: a parasite that lives inside the host.
Erratic parasite: a parasite that does not have a specific host species.
Facultative parasite: a parasite that can live freely but can also parasitize a host.
Homoxenous parasite: a parasite that undergoes its entire life cycle in one host species.
Incidental parasite: a parasite that is not specific to a particular host species.
Infection: the presence of a parasite in or on a host.
Infestation: the presence of a parasite on the surface of a host.

Nematodes

Nematodes are covered by a thin cuticle that covers the exterior body surface and extends into all body openings.
The cuticle is secreted by the hypodermis, a thin layer beneath the cuticle.
Nematodes have spindle-shaped muscle fibers that enable movement.
Female nematodes can produce thousands of eggs or larvae each day.
Nematode eggs vary greatly in size and composition, and differ in larval stages.

Nematode Egg Types

Ascaroid (ascaris) type (e.g., Toxocara canis)
Trichostrongyle (strongyle, hookworm) type (e.g., Ancylostoma caninum)
Spiruroid (spirurid) type (e.g., Spirocerca lupi)
Trichinelloid (trichuroid) type (e.g., Trichuris vulpis, Capillaria spp.)

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Description

Test your knowledge of veterinary parasitology, including types of parasites, symbiosis, life cycles, and classification schemes.