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