P7 - Erythrocytes Part 2 Flashcards
1
Q
Anaplasma marginale significance
A
- marginal bodies in first few days of anemia
- resemble Howell-Jolly but are on margin of cell
2
Q
Cytauxzoon felis significance
A
- tick born
- part of life cycle
- go from ring form to cross
3
Q
babesia sp. identification (2)
A
- B. canis - tear drop shaped
- B. gibsoni - ring form
4
Q
mycoplasma haemofelis formation
A
- grows on cell
- cocci and rings on surface
5
Q
anisocytosis
A
- different sizes of cells
6
Q
macrocytes
A
- increase diameter -> increase volume
7
Q
microcytes
A
- decreased cell volume
8
Q
poikilocyte
A
- cells of different shapes
9
Q
acanthocyte
A
- spur
- 1-20 irregularly spaced membrane projections (usually blunt)
10
Q
acanthocyte formation
A
- RBC trauma or excess membrane lipid
11
Q
codocyte
A
- hat/bullseye
- central focus of Hgb surrounded by ring of pallor
12
Q
codocyte formation
A
- excess membrane relative to amount of Hgb
- usually with regenerative anemia
13
Q
eccentrocyte
A
- condensed portion that stains dark
14
Q
eccentrocyte formation
A
- oxidative damage to RBC membrane and Hgb
15
Q
echinocyte
A
- spiny (regular all the way around)
16
Q
echinocyte formation
A
- membrane changes
- dying artifact
17
Q
elliptocyte (ovalocyte)
A
- elliptical or oval
18
Q
keratocyte
A
- horn
- notched cell with 1 to 2 horn-like projections (looks like a bite)
19
Q
keratocyte formation
A
- intravascular RBC trauma
20
Q
pyknocyte
A
- spheroidal cell with condensed Hgb
21
Q
pyknocyte formation
A
- oxidative damage to membrane and Hgb
22
Q
schizocyte
A
- triangular, comma-shaped or round RBC fragment
23
Q
schizocyte formation
A
- intravascular RBC trauma
24
Q
spherocyte
A
- round
25
spherocyte formation
- removal of membrane or defective membrane
26
yellow/orange plasma in herbivores due to
- plant pigments
27
erythrocyte parasites causing hemoglobinemai and hemoglobinuria (3)
- Babesia
- Theileria
- Rickettsiae
28
erythrocyte parasite causing hemobartonella
- mycoplasma hemofelis
29
impedance cell counters ID erythrocytes by
- volume
30
optical or laser flow cell cytometers ID erythrocytes by
- light scatter
31
centrifugation analysis ID erythrocytes by
- % blood volume occupied by cells
32
exceptions to the normal total increase or decrease in Hct [Hgb] and [RBC] associated with increase RBC mass (3)
- different sizes of RBC
- hypochromic RBC with less Hgb
- in vitro hemolysis (Hbg not changed)
