Draschia megastroma/ Habronema spp/ Habronema majus Flashcards
class
nematoda
order
spirurida
hosts
all horse species
what kind of nematode is this?
stomach nematode
size of D. megastoma adult
13mm
what kind of buccal cavity fo Draschia megatoma have?
funnel shaped buccal cavity
What is the size of Harbronema spp?
22-25mm
what kind of buccal cavity do the harbronema spp. have?
cylindrical buccal cavity
are these parasites eggs thin or thick shelled?
thin
is the life cycle direct or indirect?
indirect
what is the intermediate host for Draschia megatoma and Habronema muscae
musca domestica
what is the intermediate host for the habronema majus?
musca spp, stomoxys calcitrans
what animal is the intermediate host for all these species?
flies
what is the site of infection
adults and larvae in stomach
L3 also in skin
pathogenesis
larvae: cutaneous habronemiasis and cutaneous drashiasis, conjunctivitis
adults: nodules in stomach
clinical signs
larvae: “summer sores”
adults: gastritis
diagnosis
recovering of eggs in feces, difficult
larvae in skin scraping
treatment
MCL’s, fly control
identification of eggs
thin shelled and larvated (paperclip) eggs
eggs collapse in feces
size of eggs
40-55 x 8-16 micrometers
what is the infective stage?
L3 larvae- inside of fly. fly can deposit larvae on host or the fly may be eaten by the host
life cycle is synchronized with ____
flies