Parasitology-overview Flashcards
Parasite
Parasite Facts
Parasite= a smaller organism that lives on or in and at the expense of a larger organism called the host .
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
Diagonostic tool for parasitology
SIS Diagnostic Approach: factors to consider to diagnose parasite
Host Species
Site of Infection
Size of parasite
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
List all significant characteristics for the parasitic groups discussed.
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Helminths
Helminths= Group of worms!
- nematoda
- cestoda
- trematoda
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
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
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
Arthropods
Arthropods= Group of Insects!
Insects
- flies
- fleas
- lice
- hemiptera
Arachnids
- ticks
- mites
Class Insecta
Arthropods group
Class Insecta= insects
Flies - Fleas - Lice - Hemiptra
Characterists of insects
- Adults: 3 pairs of legs
- Head, thorax, abdomen
- Antenna
Class Arachnida
Arthropod group
Class Arachnida= Acari
Ticks + Mites
- Characteristics of both:
- 4 pair of legs
- cepalo-thorx and abdomen
- no antannae, but palps
Subkingdom Protozoa
Subkingdom Protozoa
Protozoa= unicellular, eukaryotic animals
Classified based on mode of locomotion
- Pseudopodia
- Flagella
- Gliding movements
- Cilia
What we need to know about parasitology as veterinarians
- ) What is it?
- )How can you tell my animal has it?
- )Where did it come from?
- )What harm does it cause?
- )Can you get rid of it?
- )Will it infect people?
