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anemia
reduction in hemoglobin &or reduction in RBC
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most common of Protozoans that infect RBC
Haemobartonella
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Mycoplasma haemofelis
Feline Infectious Anemia
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Feline Infectious Anemia
Mycoplasma haemofelis
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only blood parasite of cats
Mycoplasma haemofelis/ Feline Infectious Anemia
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Howell Jolly Bodies are associated with
Feline Infectious Anemia
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Mycoplasma haemocanis
- less common producing same symptoms in dogs as Mycoplasma haemofelis
- splenectomies common
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yellow mm in cats would indicate
Feline Infectious Anemia
(icteric gums=RBC have been lysed)
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Cytauxzoonfelis
- spread by tick
- natural infection in bobcat
- rare but fatal to house cats
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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
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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
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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)
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another name for Babesiosis
Piroplasmosis
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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
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Trypanosoma cruzi in humans
Chagas Disease
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Texas Cattle Fever
- etiology: Babesia bovis (protozoan)
- vector: Boophilus annulatus
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*common etiologies!!!*
- 1. virus
- 2. protozoan
- 3. rickettsia
- 4. fungus
- 5. bacteria
- 6. spirochetes
- 7. metazoan
- 8. PPLO
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rickettsial parasite found in WBC&RBC
Ehrlichia
(in cells as morula stage)
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"Viet Nam Disease"
Ehrlichia canis
- signs:
- dog: anemia, pyrexia, photophobia, epistaxis, splenomegaly on necropsy
horse: edema, WBCpenia
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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
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causes Nagana
Trypanosoma brucei
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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
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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
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blood cell parasites of cat
- Mycoplasma haemofelis
- "Infectious Feline Anemia"
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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
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blood cell parasites of pig
- Eperythrozoon suis "Epi"
- ring like structure located in erythrocyte
- intra&intercellular
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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
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