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42 Cards in this Set
- Front
- Back
what is myiasis?
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invasion of tissue by dipterous larvae
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what is the common name for calliphoridae?
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bottle flies or blow flies and screwworm flies
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what is the common name for gasterophilidae?
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horse bot
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what is the common name for Hypodermatidae?
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cattle grub, warble or heel fly
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what is the common name of oestridae?
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nose bot
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what is the common name cuterebridae?
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emasculating fly, skin bot
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what is the morphology of Calliphoridae?
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slightly larger than Musca, bright metallic color
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what is the life cycle of Calliphoridae?
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eggs laid in carrion or decaying vegetable matter, diseased tissue or in wounds, and hatch in 24 hours. After a week of feeding larvae drop to ground or crawl to a dry area and form puparium. Adults emerge in a month
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what is the pathology of Calliphoridae?
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maggots may infect wounds or soiled wool or hair coat. If area is not treated, healthy tissue is invaded
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what is the common name of Cochliomyia hominivoraux?
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primary screwworm
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what is the life cycle of Cochliomyia hominivoraux?
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females deposit batches of 10-400 eggs in shingled masses on edge of wound > larvae feed on living tissue for 3-5 days > female fly copulates once
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how was Cochliomyia hominivoraux eradicated from S. US?
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release of irridated pupae
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what is the pathology of Cochliomyia hominivoraux?
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a true parasite. Lives only in the living flesh of warm-blooded animals. Only a small break in integument will permit infestation
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what species are in the family Gasterophilidae?
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Gastrophilus intestinalis, Gastrophilus nasalis, Gastrophilus haemorrhoidalis
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what is the common name of Gastrophilus intestinalis?
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horse bot fly
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what is the common name of Gastrophilus nasalis?
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throat bot fly
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what is the common name of Gastrophilus haemorrhoidalis?
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nose bot fly
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what is the morphology of all bot flies?
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large, heavy bodied like honey bees or bumble bees but hey lack mouth parts
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what is the morphology of Gasterophilidae?
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3rd stage larvae are mature bots, 1-2 cm long, 0.5-1cm in diameter. Respiratory spiracles identify genera
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what is the life cycle of Gasterophilidae?
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adult flies emerge during latter half of the summer and live for about 3 weeks. Larvae penetrate the mucosa of the cheek, gums and tongue for about a mnth then pass to the stomach.
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where does Gastrophilus intestinalis lay eggs?
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fetlock and forelegs, requires licking to hatch, attach near cardiac region
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where does Gastrophilus nasalis lay eggs?
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intermandibular area, hatch spontaneously in about 5-10days, attach near pylorus in the duodenum, attach, larvae (bot) remain in the horse for 8-10 months then pass out in feces > pupation takes place in loose dirt > 3-5 weeks adults emerge mid summer
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where does Gastrophilus haemorrhoidalis lay eggs?
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nose and cheek, hatch spontaneously in 5-10days
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what is the pathology of Gasterophilidae?
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adult flies annoy horses. Heavy infestation may damage mucosa of mout hand stomach and may block the pyloris
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what is the common name of Hypoderma bovis?
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northern cattle grub
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what is the common name of Hypoderma lineatum?
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cattle grub
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what is the life cycle for Hypodermatidae?
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females lay as many as 800 eggs on hairs of cattle's legs, hatch in about4 days and crawl down hair and penetrate skin. Both species cut holes in the skin of the thoracolumbar region. After 5-10 wks in subcutaneous cysts on the back, larva enlarges hole, works its way out and falls to the ground
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what is the life cycle for Hypoderma lineatum?
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migrates in CT to the esophageal submucosa where it remains until midwinter and then migrates down the esophagus to the diaphragm up through loin muscle to a subcutaneous location on the back
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what is the life cycle for Hypoderma bovis?
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migrates throug the spinal canal and muscles of the back to subcutaneous tissues
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what is the pathology of Hypodermatidae?
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killing bots in the spinal canal or esophagus leads to paralysis or bloat. Treat soon after fly season. Do not delay
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what are the consequences of Hypodermatidae?
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cattle have instinctive fear of adult flies and may stampede, migration of larvae through loin muscles results in tracts and condemnations, hides punctures by larvae are downgraded
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what is the common term for Family Oestridae?
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head maggots
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what is the common name for Oestrus ovis?
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sheep bot
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what is the life cycle for Oestridae?
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larvae deposited in the nostrils of sheep and goats during summer or early autumn. Larvae crawl up nostrils into sinuses where they attach to mucosa and feed. By spring, larvae are developed and crawl down nostrils to be sneezed out
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what is the pathology of Oestridae?
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heavy infestation can be fatal if there is penetration into the cranium. Animals show great distress by sneezing and shaking of head, loss of appetite and a purulent discharge
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what is the common name for Family Cuterebridae (ie Cuterebra spp?)
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emasculating fly
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what is the life cycle of Cuterebra spp?
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fly lays eggs at rodent borrow entrance. Mechanical stimulation (rodent, predator) causes larva to come out of nits nad move onto and into host. Enter host through natural orifice (nose, mouth, eye orbit.)
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what is the pathology of Cuterebra spp?
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subcutaneous cyst containing bot at head or neck of dogs and cats and squirrels. In rodents, enters the scrotum
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what is the treatment of Cuterebra spp?
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do not rupture bot, attempt to remove by applying vaseline to cover spiracles and or blunt dissection to enlarge opening
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what is the common name for Dermatobia hominis?
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human skin bot
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what is the life cycle for Dermatobia hominis?
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eggs laid on a mosquito or stable fly (slave fly). Larvae hatch and enter host upon with the slave fly is feeding
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what is the pathology of Dermatobia hominis?
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subcutaneous cyst containing bot in man, cattle, sheep and other mammals in Central and South America
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