arthropod parasites of veterinary importance-image handout...
TRANSCRIPT
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Arthropod Parasites ofVeterinary importance
20112011VPM‐122 Laboratory 5
Spencer J. Greenwood PhD, DVMDept. of Biomedical SciencesRoom 3313N AVC North Annex
[email protected]@upei.caOffice phone # 566‐6002
To see the images on the web, go to: http://people.upei.ca/sgreenwood/html/protozoa.htmlhttp://people.upei.ca/sgreenwood/html/protozoa.html
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VPM‐122 Laboratory 5 ImagesVPM 122 Laboratory 5 Images
• The following images of been generated for your g g g yreviewing and studying pleasure…honest!
• I have typically provided two views of the same imageimage– 1) so you can see diagnostic details– 2) a “boxed” image so you can see the relative size the ) a bo ed age so you ca see e e a e s e eparasite looks on the specified microscope objective (e.g 10X).
– Comments for improving this handout are welcomeComments for improving this handout are welcome and encouraged!
– Thanks, Spencer
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1) Mites
Demodex canis ‐ adult mite from the skin of a dog.
Demodex injai ‐ adult mite from the skin of a dog.
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Sarcoptes sabei var. canis ‐adult mite from skin of a d N ldog. Note: long unsegmented pedicle or stalk (black arrow) with sucker at end (red arrow).
Sarcoptes sabei var. canis ‐ adult female mite from skin of a dog.Note: long unsegmented pedicles (stalks) with sucker at end on legs 1 & 2.
( )
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Otodectes cyanotis ‐ adult male mite from the ear of a dog
Otodectesmites male (top) and female (bottom) It is not unusual toear of a dog.
Note: short unsegmented pedicle with suckerat the end on each leg.
female (bottom). It is not unusual to see them under the microscope “joined together”...
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Cheyletiella sp. ‐ Note: the large palpalclaws (arrow)
Cheyletiella sp ‐ from the skin of a cat ACheyletiella sp. from the skin of a cat. A surface mite known as “Walking Dandruff”. Note: the long legs and the large palpal claws(arrow) on the ‘head’.
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Chorioptes sp. from a cow. Adult male. Note: the short unsegmented pedicles with suckers.
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Psoroptes sp. from the a sheep. Note the long legs & long segmented pedicles (see below to convince yourself).
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Knemidocoptes sp. found on a budgie. This is a burrowing mite known as the Scaly Face or Scaly Leg mite of birds. They have a Round b d l h ll bbbody similar to Sarcoptes with small stubby legs. Females have no suckers. NOT ON LAB EXAM
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2) TICKS
Ixodes sp. from a dog ‐ Engorged female. Note: anal groove in front
Ixodes sp. from a deer ‐ Note: arrow indicates the ‘anal groove in front of anus’ that is used
of anus. to diagnose members of this Genus. Six legged larval stage.
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Rhipicephalus sp. ‐ A. Stained specimen with a noose!, Note the hexagonal shaped basis capitulum (red arrow) and deep clefts in the fore coxae (black arrow). B. Cleared specimen showing ‐ hexagonal shaped basis capitulum
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Dermacentor sp. from a dog. Note the ‘rectangular’ basis capitulum and festoons
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3) Fleas)
Ctenocephalides felis ‐The cat flea. Pronotalcomb (red arrow) and ( )genal comb (black arrow).
Ctenocephalides felis ‐ The cat flea The mostCtenocephalides felis The cat flea. The most common flea on both cats and dogs
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4) Keds
Melophagus sp. ‐ Adult sheep ked. Note how fly‐like it looks. Often described as a wingless fly.
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5) Lice
Trichodectes sp found on a dog This is a chewing louse Note: thatTrichodectes sp. found on a dog. This is a chewing louse Note: that the head is wider than the thorax. They have sx legs attached to the thorax. The front pair of legs are obscured by this louses massive head.
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Linognathus sp. from the skin of a Hematopinus sp. from the skin of a pig. dog. Stained specimen (red dye)..
Note: these are both sucking lice, the head is narrower than the thorax
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6) Bots
A B C
A) Gasterophilus ‐ Horse bot fly larvae (stomach of horse), ~ 1‐1.5 cm in lengthB) Hypoderma ‐ Cattle grub back of cow ~ 3cm in lengthB) Hypoderma Cattle grub, back of cow, 3cm in lengthC) Cuterebra ‐ Rodent bot fly (from the neck skin of a dog), ~ 2.5 cm in length