Acarina - Mites Flashcards
Name the differences between ticks and mites
Mites are very small and have NO teeth on hypostome
Ticks have teeth on hypostome and most stages of life are visible
3 characteristics of mites
1) 1 body region
2) Sac-like body = head + thorax & abdomen
3) Free living, many plant feeders, some are predators, a few parasites
5 parasitic mite groups
1) Burrowers = mange mites (scabies)
2) Ear mites
3) Ectoparasitic mites
4) Non-burrowing mange mites
5) Demodectic or follicle mites
What are the 6 ways mites affect their hosts?
1) Tissue damage or dermatitis - damage to hides/fleece
2) Produce allergic reactions
3) Secondary infection
4) Feed on blood or other fluids - lymph
5) Increase stress, reduce performance
6) Transfer pathogens
Mite lifecycle
Gradual metamorphosis
Egg - Larva - Nymph - Adult
4-8 week lifecycle depending on species and temperature
Any skin condition caused by mites that results in skin irritation and scratching
Mange
Mange mites are obligate parasites (have to be on host) that spred by _____ or _____.
Direct contact or fomites (nonliving object that can spread pathogen)
A serious and debilitating form of mange that is reportable and quarantined
Scabies mites
Burrowers - mange mites prefer what part of the body
Hairless
How long do mange mites survive off of host?
24-36 hours
Where to look for mange mites on horses
Chest, base of tail, can be all over
Where to look for mange mites on swine
Neck, shoulder, ear, withers to tail
Where to look for mange mites on cattle
Inner surface of thighs
Diagnosis of mange mites requires…
You need a _____ exam to see them
Deep skin scraping - in oozing blood
Microscopic
_____ remain in blood after scabies are gone
Antibodies
