Final Flashcards
When is lice a problem in cattle?
winter
How many eggs does a flea lay in a day? a lifetime?
day = 25-50 liftetime = 2,000
When do flea eggs hatch?
2-5 days after being laid
What can kill all life stages of flea?
freezing
How long is the lifecycle of fleas in the midwest?
28 days
What causes generalized demodex/red mange?
t-cell deficiency, inherited
What shape is demodex?
cigar shaped
What genus is walking dandruff?
cheyletiella
What is the most important external parasite in pigs?
sarcoptes scabii ssp. suis
What is the lifecycle of demodex mites?
all life stages in the hair follicle
What is the cause of red mange?
demodex
What part of chiggers life cycle is parasitic?
larvae
What mite is reportable?
psroptes
How long is the otodectes mite life cycle?
3 weeks
What can otodectes cause besides ear itching?
lesions on face
What mite causes scabies in cats?
notoedres cati
What is the “scaly leg mite”?
knemidokoptes mutans
What is the host of knemidokoptes?
birds
What are the clinical signs of knemidokoptes?
deformed beaks, toe nails deformed
What is the DH of chiggers?
turkeys and other fowl
How does chiggers cause damage?
produce enzyme that liquefies skin, does not burrow
What is the scientific name for lone star tick?
amblyomma americanum
What tick has a painful bite and long piercing mouth parts?
lone star tick
Which ticks do not have festoons?
black legged tick
Which ticks have an “oranate”” appearance?
dermacentor (wood tick, dog tick)
What tick genus uses dogs for it’s whole life cycle?
Rhipicephalus, brown dog tick
What tick has a “frowny face” because the anal groove is anterior to the anus?
ixodes scapularis,(deer tick, black legged tick)
What tick can cause rash and flu but no other severe symptoms?
southern tick but is amblyomma americanum (lone star tick)
What tick transmits lyme disease?
ixodes scapularis (deer tick)
What is the tick that can reproduce indoors?
rhipicephalus sanguinus (brown dog tick)
What tick can the male not engorge on blood?
dermacentor, (dog tick)
What myiasis damages hide in cattle?
hypoderma
What is the horse bot fly?
gastrophilus
Where does gastrophilus lay its eggs?
on legs of horses
What is the sheep nasal bot?
oestrus ovis
