68 Flashcards
(22 cards)
Ticks are _______ feeders & do not ________?
Ticks are SLOW feeders and do NOT TRANSMIT DISEASE QUICKLY
Hypostome
Attachment structure of tick, ventral to mouth
Scutum
Shield like structure that covers back in male, half of back in female
Tick Morph & Stages
Egg
Larvae - 6 legs
nymph, tick - 8 legs
Ixodes Ticks (carry)
Lyme, babesiosis
Dermacentor Ticks (carry)
Tularemia, RMSF, Colorado tick fever
Tick Paralysis
Amblyomma americanum Ticks (carry)
Lone Star Tick
Tularemia, lyme, RMSF
Tick Paralysis
Rhipicephalus sanguineus Ticks (carry)
Ehrlichiosis, babesiosis in dogs
RMSF, Mediterranean spotted fever
Tick Paralysis due to….
Dermacentor or Amblyomma americanum tick feeding for days. Paralysis linked to component in female saliva. Can die from resp. paralysis
Pyemotes dermatitis is _____ & causes _____?
Mite
straw & grain itch, provokes allergic response
Demodiciosis (causative agent, description of condition)
Demodex folliculorum (mite) Pruitic acne like dermatitis
Chigger Dermatitis (causative agent, description of condition, trx)
Eutrombicula (mite)
- produces pruritis but does NOT burrow
- humans are accidental host
- TRX OTC anti-pruritics
Scabies (causative agent, description of condition)
Sarcoptes scabiei (mite)
- female mite burrows resulting in pruritcs eruptions
- pururitic eruptions stop at folds (hands, wrist, beltline, breasts, genitalia, butt, perineum)
Mite genera
Pyemotes (straw & grain itch)
Demodex (demodiciosis)
Eutrombiula (chigger dermatitis)
Sarcoptes (scabies)
Types of Scabies (Sarcoptes scabiei)
Canine: self limiting in people
Crusted (norwegian) - most intense & linked to HIV/immunodef
Pediatric - similar to crusted
TRX for Scabies
Ivermectin or Permethrin
Causative agent of lice
Pediculus humanus (head & body) Phthirus (pubic) - crabs
Causative agent of crabs
Pubic lice
Phthirus
Pathophysiology of crabs (phthirus)
Eggs are cemented to pubic hair and adults bite (feed) in pubic area
(Egg to egg cycle : 3wks)
Identification stage of lice/crabs
Nits (egg cemented to hair) or seeing lice
Pahtophysiology of lice (Pediculus)
Eggs are cemented to hair and adults bite (feed)
Bloodsuckers are vector for typhus (head lice only)
TRX of lice
permethrin
pediculicides
