parasites practical exam
Ctenocephalides felis features
Now the most common flea encountered on dogs and cats Large abdomen= female Very similar to dog flea; both have combs behind and below the head
Egg like stage of apicomplexa coccidian protozoa species affected features
Passed in faeces in unsporulated (undeveloped form)
Haematopinus Suis animals bite sucking
Pigs Sucking
Pulex irritans animal infected
Pigs and humans
Bovicola ovis features
Presence can result in wool damage-itchy animals rub selves Looks very similar to B.bovis
Pulex irritans features
Readily differentiated from Ctenocephalides by absence of combs behind and below head
Calliphora stygia features
Robust with a blackish body, covered in fine golden brown hairs 3rd primary strike fly
Bovicola ovis animal affected suck or bite
Sheep Biting
Calliphora stygia animal commonly affected and type of fly
Sheep Blowfly
Chrysomya rufifacies anima, commonly infected and type of fly
Sheep Blowfly
Oestrus ovis type of fly
Sheep nasal botfly
Linognathus pedalis animal infected bite or suck
Sheep sucking
Chorioptes bovis animals affected
Sheep, cattle, horses
Calliphora vicina animal affected and type of fly
Sheepo Blowfly (these known as 'bluebottles')
features demodex
Small and cigar shaped, lives in the hair follicles
Linognathus vituli features
From a distance lousy animals look dirty and unkempt
Chorioptes bovis features
Generally confined to the scrotum of rams, around the tail of cattle and legs of horses
Gasterophilus features
Hairy bee-like fly Adults do not feed G.intestinalis most common in NZ; larvae attached to cardiac aglandular end of stomach
Cnemidocoptes mutans animals infected
Birds
Cnemidocoptes mutans
Burrowing mite causing scaley leg Very short legs, hind pairs do not project beyond the posterior margins
Calliphora vicina features
Can be a secondary strike fly
Ctenocephalides felis animal
Cat
Felicola subrostratus animal bite suck
Cats Biting
Haemaphysalis longicornis animal affected
Cattle
Theileria animal affected
Cattle
Bovicola bovis animal affected and suck or bite
Cattle Biting
Linognathus vituli animal and suck or bite
Cattle Sucking
Lucilia (sericata and cuprina) features
Cuprina now more common in NZ, more aggressive blowfly-relying almost exclusively on live sheep Both are primary strike flies
Sarcocystis features
Cysts are virtually non pathogenic to host but unacceptable in meat
giardia features
Different species occur in a wide range of hosts. Possibly pathogenic, causing diarrhoea
Babesia canis animals affected
Dogs
Trichodectes canis animal bite suck
Dogs Biting
Linognathus setosus animals bite suck
Dogs Sucking
Otodectes cyanotis animals affected
Dogs, cats
Sarcoptes scabiei animals
Dogs, cats, humans, pigs, etc
Demodex animal affected
Dogs/Horses/Cats/lots of animals
flea larvae features
Eggs laid by adult fleas on host fall into environment and first larval stage emerges out of them. Larvae feed predominantly on dried faeces of adult fleas Under the microscope the larvae have hairs and look a little like maggots
Linognathus pedalis features
Found on hairy parts of sheep legs Head is narrower than thorax
Psoroptes cuniculi animal affected
Herbivores
Gasterophilus animal type
Horse Bot fly
Haematopinus asini animal sucking biting
Horse Sucking
Stomoxys calcitrans animals commonly afflicted and type of fly
Horse, Cattle, Humans 'the stable fly' A Muscidae fly
Bovicola equi animal bite suck
Horses Biting
Stomoxys calcitrans
In feeding the entire probiscus (anterior projection) is thrust into the skin of the host-blood sucking Common in NZ
Cheyletiella spp features
Known as walking dandruff Has large hooked palps (distinctive feature)
oestrus ovis larvae found
Larvae found in frontal sinuses where they feed on mucosal lining and nasal secretions Adult females do not feed
Cryptosporidium animals affected
Mammals and birds
Egg like stage of apicomplexa coccidian protozoa species affected
Many
Psoroptes cuniculi features
Mite may cause otitis externa; more often diagnosed in horses. Related to the now eradicated mite Psoroptes ovis which causes sheep scab
Sarcoptes scabiei features
Mites burrow into superficial layers of the epidermis and cause sarcoptic mange-pruritic Mites hve 8 legs in adult + nymph stages, 6 as a larvae. Legs short and stumpy and do not project much beyond posterior margin. Each leg has a sucker on a stalk
Chrysomya rufifacies eatures include larvae
Most common secondary strike fly Looks like Lucilia but each segment has a black band Larvae are very spiky
Otodectes cyanotis features
Non-burrowing, legs are long. One of the larger mite species
theileria features
Theileria parva. Related to Theirlera orientalis which is transmitted by Haemaphysalis ticks
Haematopinus asini featrues
Very big and can be seen with naked eye
Bovicola equi Can be referred to as
Werneckiella equi
Cryptosporidium features
ZN stain, oocysts come up pink because they are acid fast Very small parasites of brush border of intestinal mucosa of mammals and respiraotry tract of birds
Haematopinus Suis features
large
giardia species afffected
range of hosts
Lucilia (sericata and cuprina) animals commonly affected and type of fly
sheep Blowfly
Sarcocystis species affected
sheep muscle