External Parasites II & Blood parasites

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External Parasites II & Blood parasites
2014-07-14 20:33:59
Vet Tech

External Parasites II & Blood parasites
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  1. Name/Nickname
    The Rocky Mountain Wood tick Dermacentor andersoni occurs in West Nebraska and Northern Canada

  2. Name/Nickname
    Vectors of:
    The "American dog tick" Dermacentor variabilis is found allover North America, except in the Rocky Mountains. Both Dermacentor andersoni and Dermacentor variabilis are the chief vectors of Rickettsia rickettsii and tick paralysis in livestock.

  3. Name/Nickname
    Dermacentor occidentalis "the Pacific Coast tick" is restricted to the Pacific lowlands.

  4. Name/Nickname
    Intermediate host of:
    Ixodes scapularis "the black-legged tick" commonly parasitizes livestock in the southern U.S. is the intermediate host of Lymes disease.

  5. Name/Nickname
    Vector for what 4 parasites:
    • Rhipicephalus sanguineus the "kennel tick or brown dog tick", has traveled worldwide. It is the most common tick of dogs in the U.S. Is the vector for Babesia canis, Ehrlicha canis and Rickettsia sp.
    • Note: Rhipicephalus sanguineus is also associated with the spreading of Leishmaniasis (not just the sand fly anymore).

  6. Name/Nickname
    A split screen of Otobius megnini the "spinose ear tick" and Otobius megnini in an ear canal.

  7. Family:
    The family Dermanyssidae contains Dermanyssus gallinae the "red-feather mite" of poultry, pigeon, and wild birds. It causes anemia and death in birds.
  8. Dog
    Demodex canis is an elongated mite which infests dogs worldwide, causing skin lesions and reactions.
  9. Rabbit
    Cheyletiella parasitivorax "walking dandruff' is the fur mite of rabbits
  10. Dog
    Family Sarcoptidae contains the most familiar mite Sarcoptes scabiei.
  11. Pig
    Sarcoptes scabiei lesion on a pig
  12. Dog
    Sarcoptes scabiei lesion on a dog's ear
  13. Cat
    Notoedres cati "feline scabies" lesions most commonly see in domestic cats.
  14. Psoroptes sp. are larger than Sarcoptes sp. and have longer legs. Sheep Scabies leads to degeneration in the fleece quality and quantity.
  15. Otodectes sp. ear mite in dogs and cats
  16. Dog
    Haemobartonella canis (Mycoplasma haemocanis) - long chains on the surface of RBCs. This organism may become apparent when the spleen is diseased (lymphosarcoma) or following spleenectomy XIOOO
  17. Dog
    Haemobartonella canis (Mycoplasma haemocanis) (protozoan) - in blood from splenectomized dog. X 1000
  18. Dog
    RBCs containing the protozoan Babesia canis Xl800
  19. Dirofilaria immitus XlOOO
  20. Cat
    Haemobartonella felis (Mycoplasma haemofelis) - cocci or rods at the margin of the RBCs.
  21. Cat
    Haemobartonella felis (Mycoplasma haemofelis) in blood from cat with Feline Infectious Anemia, seen on the surface and at the margins of erythrocytes. Round deeply stained Howell-Jolly bodies on the RBC in center area. Xl8000
  22. Cat
    Toxoplasma gondii - cyst in a blast cell from the bone marrow of a cat in their terminal phase of erythroleukemia Xl800
  23. Horse
    A morulae of Ehrlichia equi in neutrophils in the blood of a horse stained with New Methylene blue stain.
  24. Horse
    Four morulae of Ehrlichia equi in neutrophils in the blood of a horse
  25. Horse
    Babesia caballi - numerous tear drop shaped organism in erythrocyte of a horse.
  26. Horse
    Trypanosoma congolense - from a horse of Kenya, East Africa XIOOO
  27. Cow
    Anaplasma marginale - in bovine blood appearing as round deeply stained structures in eccentric positions.(arrows) Also, Eperythrozoon wenyonii appearing as faintly stained objects on surface of the margins of several RBCs. Xl800
  28. Cow
    Eperythrozoon wenyonii - in center (arrow) and on the margin of RBC. Compare to more deeply stained Anaplasma marginale located inside and at the margins of 2 RBCs. X1800