Ectoparasites: Phylum Arthropoda Flashcards
Phylum Arthropoda
“Jointed foot”
Arthropods may serve as
Casual agents and produce venoms or toxic substances
Intermediate hosts for protozoan and helminth parasites
Vectors for bacteria, viruses, and other pathogens
What do adult Arthropods have?
Jointed legs
Segmented bodies with a hard outer covering
Have a Hemocoel
Dioecious and reproduce by means of eggs
What is the hard outer covering composed of?
Chitin
What is the Hemocoel?
A body cavity filled with hemolymph
What does Dioecious mean?
Male and female individuals
What are the characteristics of insects?
3 pairs of legs
3 distinct body regions
What are the three distinct body regions of insects?
Head
Thorax with or without wings
Abdomen
What are the characteristics of Arachnids?
4 pairs of legs
2 body regions
No antennae
What are the two body regions of arachnids?
Cephalothorax
Abdomen
What are the mouthparts of both insects and arachnids adapted for?
Their meal
Bloodsucking
Chewing
Sponging
What are the developmental stages of most insects?
Egg
Larval stages
Pupa
Which insect stage is the metamorphosis stage to adult?
The pupa stage
Which insect stage is the hardest to get rid of?
The pupa stage
What are the developmental stages of other insects?
Egg to immature adult or nymphs that resemble the adult form
What are the developmental stages of arachnids?
Egg
Larva
Nymph
Adult
How many orders are included in the class Insecta?
30
Class: Insecta
Order: Siphonoptera
Fleas
Class: Insecta
Order: Mallophaga
Biting lice
Class: Insecta
Order: Anoplura
Sucking lice
Class: Insecta
Order: Diptera
Flies and mosquitos
Class: Arachnida
Order: Acarina
Sarcoptiform mites
Scabies and ear mites
Class: Arachnida
Order: Trombidiformes
Non-sarcoptiform mites
Demodex and fur mites
Class: Arachnida
Order: Ixodida
Family: Ixodidae
Hard ticks
Class: Arachnida
Order: Ixodida
Family: Argasidae
Soft ticks
What are the diagnostics for Ectoparasites?
May be seen grossly
Skin scrape
Cellophane tape method
Eat mite check
What ectoparasites may be seen grossly?
The presence of fleas and ticks
What are the two types of skin scrapes?
Deep
Superficial
What are you looking for when doing skin scraping?
Mites
What kind of mites do you see on a deep skin scraping?
Demodex
What kind of mites do you see on superficial skin scraping?
Scabies
What ectoparasites do you look for when doing a cellophane tape method?
Fur mites and lice
