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Flashcards in Parasitology-overview Deck (14):
1

Parasite

Parasite Facts

Parasite= a smaller organism that lives on or in and at the expense of a larger organism called the host .

 

2

Describe and understand the roles that a veterinarian plays in parasitology.

Roles that veterinarians play in parasitology

  • diagnosis
    • awareness of clinical relevence
  • treatment
  • prevention
    • prenative treatmets
  • population control- reduce parasit in population
  • monitor zoonotic parasit
    • parasit transfered between humans and animals

3

Diagonostic tool for parasitology

SIS Diagnostic Approach: factors to consider to diagnose parasite

Host Species

Site of Infection

Size of parasite

 

 

4

List 6 parasitic groups of veterinary importance

List 6 parasitic groups of veterinary importance

  • Class Nematoda
  • Class Cestoda
  • Class Trematoda
  • Class Insecta
  • Class Arachnida
  • Subkingdom Protozoa

5

List all significant characteristics for the parasitic groups discussed.

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6

Helminths

Helminths= Group of worms!

  • nematoda
  • cestoda
  • trematoda

7

Class Nematoda

Helminth group

Class Nematoda= Roundworms

  • Free-living or parasitic
  •  Elongate/cylindrical
  • Alimentary canal present
  • Sexes usually separate (not hermapaditic)
  • Life cycle direct or indirect

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8

Class Cestoda

Helminth group

Phylum Platyhelminthes (flatworms)

Class Cestoda= tapeworms

  • Flat body and no alimentary canal
  • Scolex (holdfast organ)
  • Strobila (body) with proglottids
  • Each proglottid- hermaphroditic
  • Indirect life cycle
  • Types of characteristic larval stages

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9

Class Trematoda

Helminth group

Phylum Platyhelminthes (flatworms)

Class Trematoda= Flukes

  • Dorso-ventrally flattened •
  • Leaf-like
  • Oral and ventral suckers
  • Indirect life cycle- molluscan IH
  •  Usually genitally independent

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10

Arthropods

Arthropods= Group of Insects!

Insects

  • flies
  • fleas
  • lice
  • hemiptera

Arachnids

  • ticks
  • mites

11

Class Insecta

Arthropods group

Class Insecta= insects

Flies - Fleas - Lice - Hemiptra

Characterists of insects

  • Adults: 3 pairs of legs
  • Head, thorax, abdomen
  • Antenna

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12


Class Arachnida

Arthropod group

Class Arachnida= Acari

Ticks + Mites

  • Characteristics of both:
    • 4 pair of legs
    • cepalo-thorx and abdomen
    • no antannae, but palps

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13

Subkingdom Protozoa

Subkingdom Protozoa

Protozoa= unicellular, eukaryotic animals

Classified based on mode of locomotion

  • Pseudopodia
  • Flagella
  • Gliding movements
  • Cilia

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14

What we need to know about parasitology as veterinarians

 

1.) What is it?

2.)How can you tell my animal has it?

3.)Where did it come from?

4.)What harm does it cause?

5.)Can you get rid of it?

6.)Will it infect people?