Diagnostic Features of Erythrocytes

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Diagnostic Featuresof Erythrocytes

• Veterinary Clinical Pathology
• Dr. Steve Stockham

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Discocyte via SEM(Bessis, 1973)
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Normal erythrocytes, dog(note central pallor and
diameter relative to WBC)
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Rouleaux, horse
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Reticulocytes (NMB stain), dog
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Reticulocytes (NMB stain), cat
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Increased polychromasia, macrocytosis, and
anisocytosis, dog
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Evidence of regeneration, dog
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Heinz bodies, cat
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Protruding Heinz body, SEM(Bessis, 1973)
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Heinz body hemolytic anemia, dog(NMB stain)
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Macrocyte with basophilic stippling, cow
basophilic stippling
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Siderocyte and Howell-Jolly body, dog
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Siderocytes with siderotic granules, dog
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Sideroblast (nucleus stains red, iron pigment
stains blue) (Prussian blue/nuclear fast red
stain), dog
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Anisocytosis due to macrocytes and cells with
decreased diameters (spherocytes or microcytes),
horse
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Anisocytosis due to hypochromic microcytes, also
codocytes and polychromats (dog)
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Poikilocytosis due to echinocytosis and
schizocytosis, pig
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Echinocytosis (crenation)(nearly all
erythrocytes are echinocytes), cow
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Echinocyte (SEM)Bessis (1973)
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Poikilocytosis due to codocytosis (dog)
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Codocytes (SEM)(Bessis, 1973)
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Microcytic hypochromic anemia of iron deficiency
(dog)
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Leptocyte Microcyte (SEM)(Bessis, 1973)
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Ovaloechinocytes(one form of burr cell), dog
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Poikilocytosis due to acanthocytosisand
schizocytosis, dog
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Poikilocytosis due to acanthocytosis,
anisocytosis due to macrocytes (dog)
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Acanthocyte (SEM)(Bessis, 1973)
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Poikilocytosis due to schizocyte, codocyte,
spherocytes, anisocytosis due macrocytosis (dog)
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Discocyte and schizocyte (SEM)(Bessis, 1973)
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Poikilocytosis due to keratocytosisand
codocytosis, dog
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Prekeratocytes (blister cells) andechinocytes
(crenation), dog
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Erythrocytes impaled on fibrin strands
(SEM)(Williams Hematology, 1972)
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Keratocyte (SEM)(Bessis, 1973)
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Poikilocytosis due to keratocytes, schizocyte,
spherocytes, and codocytosis, dog
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Poikilocytosis due to marked spherocytosis, also
increased polychromasia rubricytosis, dog
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Poikilocytosis due to acanthocytes, spherocytes,
and codocytes (dog)
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Spherocyte (SEM)(Bessis, 1973)
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Macrophage attached to 2 spherocytes
(SEM)(Bessis, 1977)
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Elliptocytosis or ovalocytosis (cat)
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Eccentrocytosis, dog
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Eccentrocytosis and pyknocytosis, horse
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Hemobartonella felis (cocci rings), cat
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Hemobartonella felis (cocci), cat
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Hemobartonella canis (dog)
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Eperythrozoon sp. on erythrocyte (SEM)(Schalms
Veterinary Hematology)
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Eperythrozoon sp. (cocci)on between
erythrocytes, pig
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Eperythrozoon sp. (rings and cocci), pig
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Marginal bodies of Anaplasma marginale, cow
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Anaplasma marginale or Howell-Jolly body?
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Cytauxzoon felis (cat)
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Cytauxzoon felis, signet rings and cocci (cat)
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Cytauxzoon felis (signet rings, cocci)
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Cytauxzoon felis (signet ring cocci), cat
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Babesia canis (2 piroplasms), dog
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Babesia canis (2 piroplasms), dog
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Babesia caballi (2 piroplasms), horse
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Theileria sp. and drepanocytosis(white tailed
deer)
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Hemoparasites (Plasmodium or Hemoproteus)
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