Blowflies, Fleshflies, Wrable/Botflies Flashcards
What is myiasis?
Fly larvae infestation of vertebrates
What is facultative myiasis?
Accidentally develops in wounds (originally in dung)
Obligatory myiasis?
REQUIRES a wound/inner part of animals
Males or females causing myiasis?
Females- they lay their eggs that will pupate in the environment/soil
But both sexes behave and feed similarly
What are the agents of traumatic myiasis? =myiasis sensu stricto
Blowflies
Fleshflies
Larvae need AIR so they develop superficially
Blowflies
Family: Calliphoridae
Metaliic bluish/green
Females lays eggs on the surface of larval development
Blowflies: Lucilla and Phormia sp
Mainly on decaying animals
Exceptionally on animals
Blowflies: Cochliomyia
Skins of animals and humans
Leaves holes in the skin
Blowfly: Green Bottle fly
Lucilla sericata
Facultative myiasis
Can be used in larva therapy- for removing decayed part of wounds
Australian sheep blowfly
Lucilia cuprina
Facultative myiasis
Gold body
Red eyes
Can lay eggs in the dried dung of the sheep, which can then infect the anus
Birds also
The new word Screw worm fly
Cochliomyia hominivorax
Obligate myiasis
Fleshflies
Family: Sarcophagidae
In general about fleshflies
Worldwide
Develop in putrid organic materials
Females lay 1st instar larvae to surface of larval development
Appearance of fleshflies
Dull grey, mottled abdomen
Looks like they have a bumpy back
Red eyes
Fleshflies: sarcophaga species
Decaying materials
Spiraculum on maggots
Wohlfahrtia magnifica sp
Skin/wounds/natural openings of animals (genitals)
Foot sores
Ears
Close to the base of horns
What are the agents of non-traumatic myiasis= myiasi sensu lato
BOTFLIES!!
Flies develop INSIDE the body, quite deep (for sure they must be underneath the skin)
The larvae develop internally- do not get in touch with the outer environment
Botflies are also known as
Warble flies
In general about botflies
Family: Oestridae
Parasitic
The larvae feed and grow inside the host
Adults cannot feed but can REPRODUCE
Oestridae subfamilies
Cuterbrinae- skin of rodents
Hypodermatinae- tissues of Ru
Gasterophilinae- stomach of odd-toes mammals
Oestrinae- nasal sinuses of ungulates
Subfamily: Hypodermatinae
Large
Resemble bumble bees
No mouth part
Maggots are white grubs with spines, turn black before they pupate in the environment
Wandering larvae of cattle
Hypoderma bovis sp
Hypoderma lineatum
Hypoderma bovis sp
Travels from CT– spinal canal– subcut on back
Hypoderma lineatum
Travels from CT– esophagus– SC tissue of the back
Human botfly
Sarcophagid
Has red eyes
Subfamily: Gasterophilinae
Larvae develop in the stomach of the host
Larvae have spiracles: L1 has one spiracle and so on…
Resemble honeybees
3rd instar grubs are red and have strong spines
Eggs look similar to nits of lice BUT nits have operculum
Affects horses- prevention with Noromectin
Gasterophilinae species
Gasterophilus:
- intestinalis
- nasalis
- haemorhoidalis
- pecorum
Gasterophilus intestinalis
Eggs on shoulder
Development in oral cavity
Gasterophilus nasalis
Eggs on lips
Development in oral cavity, pylorus, duodenum
Gasterophilus haemorhoidalis
Eggs on lips
Development in oral cavity, stomach and rectum
Gasterophilus pecorum
Eggs on grass
Development in oral cavity and pylorus
Nasal botflies
Subfamily: Oestrinae
Ungulates
The only oestrus genus that occurs in livestock
Female lays 1st larva (3 larval stages) this develops to GRUB
Grub: banded, medium spines ventrally, feeds on mucus in nasal passages and sinuses
Oestrus Ovis
SHEEP Greyish adults with mottled surface Secondary bacterial infection causes false grid: -incoordination -purulent ethmoiditis and encephalitis
