Diagnostics Flashcards
Identfy this parasite
Describe this parasite, and what is this parasite a vector off?
Trichodectes (Lice of dog)
Short, broad and yellozish in colour.
Has single claw & 6 segmented abdo.
Vector of dipylidium canium (tapeworm)
Identify this parasite.
Describe the identifying feature of this parasite.
Felicola (Lice of cat)
The id. feature of this parasite is the triangular pointed head (which is a lot more pointed in cats sp. than that of dogs). Generally the parasite is a baige yellow colour.
Lice of cats is not seen as often of that of dogs getting lice
Identify this parasite.
Desribe the feature of this parasite.
Linognathus (lice of dog & ruminants)
Long pointed nose, and generally bluish-black in colour. The eggs laid are dark blue.
Identify this parasite.
What colour is this parasite?
Columbicola columbae (Biting louse of pigeon)
Normally pale yellow & is slender looking.
Identify this parasite
Describe this parasite
Gliricola porcelli (Biting louse of guinea pig)
Yellow and slender, head is longer than wide and posteriorly rounder.
Identify & describe this parasite
Ctenocepahlides canis (flea of dog)
Head is as long as high. It is more straighter on anterior & anterior surface than C.felis but is also dark brown/black in colour and is laterally compressed.
Identify & describe this parasite
Ctenocephalides felis (flea of cats)
Head is twice as long as hight and is more rounded in shape specially the back than that of the dog flea. It is dark brown/ black and is laterally compressed.
Identify & describe this parasite
What can this parasite cause?
Sarcoptes scabeii canis (burrowing mite of cats and rarely cats)
It is venterally flattened and has short legs that scarcley project beyond the body margin. It has a round outlie and is approx. 0.4mm in diameter.
Has numerous transverse ridges and triangular scales on dorsum.
Can cause Mange (Scabies)
Identify & describe this parasite
Where is this parasite usually found?
Id. :
Demodex aka Demodicidae (burrowing mite canis= dog, cati=cat, bovis= cow) Host specific.
Describe
: It is small and cigar shaped and is up to 0.2mm long. It has 4 pairs of stumpy legs anteriorly
Found:
Hair follicles
Identify & describe this parasite
What does the parasite cause?
id: Otodectes cynotis (surface (ear) mite of dogs & cats)
Describe:
Ovoid body with long legs and visible (closed) apodemes (similar to tendons) adjacent to 1st and 2nd pair of legs and unjointed pedicles.
Cause:
Dark, bown waxy discharge in ear canal.
Identify & describe this parasite
What does this parasite cause?
Id:
Cheyletiella (surface mite)
Describe:
Oval mite with large curved hooks on either side of the mouth. 4 pairs of long legs that terminate in combs instead of claws or suckers. Have 6 long hairs (setae) on the body, one on each side of the terminal anus, 2 on each side of the body between 2nd and 3rd pairs of legs.
Female: 350-500 um long; Males: 285um.
Cause:
Excessive scalling and crusting on dorsal aspects of body with degree of pruritis.
Identify & describe this parasite
What can this parasite cause?
Id: Trombicula autumnalis (surface (harvest) mite)
Describe:
Small mite, 0.6mm length, orange/red in colour and have plumose setae. Adult/Nymph = 4 pairs of legs, 1mm long. Larvae= 0.6mm long & ONLY 3 pairs of legs.
Cause:
Intense irritation, formation of weals , papules and vesicles d/t hypersensitivity.
Identify & describe this parasite this parasite
What does this parasite cause?
Id: Dermanyssus gallinae (surface (red) mite of poultry)
Cause:
Large mite approx 1.5mm length. Has long legs that are spider like (4 pairs). Is white top greyish-black and becomes red when engorged. (Similar to tick when filled with blood)
Causes:
Irretation & debility +/- anaemia
Identify & describe this parasite
Id:
Ixodes (soft tick)
Describe:
Inornate ticks w/o eyes. Long palps and ventral surface of mite is almost entirely covered with series of plates.
Anal groove anterior to anus.
Adult= 4 pairs legs
Larvae= 3 pairs
What is the life cycle of Trichodectes? And what other parasites also have the same lifecycle?
Life cycle:
Adult female on host, lays eggs which are cemented onto hair (approx 200-300 individual egga) —> Eggs hatch to nymph (immature adults) —>Molt 3 times —>Adult
Other parasites:
Linognathus, Felicola, Columbicola and Giricola.
How would lice be diagnosed?
*Hair pluck
*Cellotape preperation
* Free catch