Blood Parasites

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Blood Parasites
2013-07-14 00:24:48

parasites of blood cells
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  1. anemia
    reduction in hemoglobin &or reduction in RBC
  2. most common of Protozoans that infect RBC
  3. Mycoplasma haemofelis
    Feline Infectious Anemia
  4. Feline Infectious Anemia
    Mycoplasma haemofelis
  5. only blood parasite of cats
    Mycoplasma haemofelis/ Feline Infectious Anemia
  6. Howell Jolly Bodies are associated with
    Feline Infectious Anemia
  7. Mycoplasma haemocanis
    • less common producing same symptoms in dogs as Mycoplasma haemofelis
    • splenectomies common
  8. yellow mm in cats would indicate
    Feline Infectious Anemia

    (icteric gums=RBC have been lysed)
  9. Cytauxzoonfelis
    • spread by tick
    • natural infection in bobcat
    • rare but fatal to house cats
  10. why do mm turn yellow?
    • RBC is made of heme-iron (yellow) and globin-protein
    • when the RBC is lysed and dumped into blood stream they turn the mucus membranes they pass through yellow¬†
  11. Anaplasmosis
    • ruminants, mainly cows
    • can be confused with HJB, however, anaplasmosis protozoans appear near margins of RBC and have slight halo, where as HJB can be anywhere
  12. Babesiosis
    • most common in dogs
    • transmitted by Rhipicephalus sanguineus in dog (Babesia canis)
    • Boophilus annulatus in cow (Babesia bigemina/bovis) and horse (Babesia caballi/equi)
  13. another name for Babesiosis
  14. Blood cell parasites of canine
    • 1. Babesia canis
    • 2. Ehrlichia canis
    • 3. Hepatozoon canis (only other to appear in WBC as does Ehrlichia)
    • 4. Histoplasma capsulatum (systemic mycotic infectio-fungus)
    • 5. Mycoplasma haemocanis (most common)
    • 6. Trypanosoma cruzi
  15. Trypanosoma cruzi in humans
    Chagas Disease
  16. Texas Cattle Fever
    • etiology: Babesia bovis (protozoan)
    • vector: Boophilus annulatus
  17. *common etiologies!!!*
    • 1. virus
    • 2. protozoan
    • 3. rickettsia
    • 4. fungus
    • 5. bacteria
    • 6. spirochetes
    • 7. metazoan
    • 8. PPLO
  18. rickettsial parasite found in WBC&RBC

    (in cells as morula stage)
  19. "Viet Nam Disease"
    Ehrlichia canis

    • signs:
    • dog: anemia, pyrexia, photophobia, epistaxis, splenomegaly on necropsy

    horse: edema, WBCpenia
  20. splenectomies predispose animals to various immunodeficient diseases:
    spleen produces lymphocytes which produce antibodies. if take out spleen, loose production of lymphocytes and antibodies and therefore more susceptible to blood parasites
  21. causes Nagana
    Trypanosoma brucei
  22. hemoflagellette of zoonotic importance
    Trypanosoma cruzi "Chages Disease"

    • "American trypanosomiasis" many forms of transmission: feces of "kissing bugs" to insect wounds.
    • acute phase can be deadly, chronic dormant for 40 yrs
  23. acute phase of Trypanosoma cruzi
    • liver enlargement, diarrhea, pyrexia
    • can be visualized on blood smear
    • if enters chronic phase, congestive heart failure is most common sign
  24. blood cell parasites of cat
    • Mycoplasma haemofelis
    • "Infectious Feline Anemia"
  25. blood cell parasites of cow
    • Anaplasmosis: A. marginae (malignant&common)
    • A. centrale (self limiting) A. ovis- sheep&goats
    • Babesia bigemina-Texas Cattle Fever
    • Eperythrozoon wenyoni- mild anemia, not life threatening like anaplas or babesia
    • Theileria mutans- occasional, anemia
    • Trypanosoma theileri- intracellular
  26. blood cell parasites of pig
    • Eperythrozoon suis "Epi"
    • ring like structure located in erythrocyte
    • intra&intercellular
  27. Slitter's Rating
    • Rare: 1 in 5 fields
    • Scarce: 1 in 1 to 5 fields
    • Occasional: 10-20% of field w parasites
    • Frequent: 50% of field w parasites
    • Numerous: 8-100% of field w parasites
    • Very Numerous: all of field covered¬†