Anaplasma marginale
Morphology: small, round, dark purple inclusions located at the periphery of red cells. Usually 1 – 2 bacteria per red cell. Present in up to 90% of red cells. Look alike: Howell-Jolly… Read more Anaplasma marginale →
Rouleaux
Morphology: stacks of red blood cells (like a stack of coins). Look alike: agglutination. Rouleaux can be distinguished from agglutination with a saline dilution test: place one drop of blood on a… Read more Rouleaux →
Agglutination
Morphology: three-dimensional clumps of red blood cells. Caused by antibodies binding red blood cells together. Look alike: rouleaux. Agglutination can be distinguished from rouleaux with a saline dilution test: place one drop… Read more Agglutination →
Cells and Smears 