Results on more than 1000 complete blood counts (CBC) performed on hot-blooded horses, in- cluding Thoroughbred, Standardbred, and Arabian, have been reviewed. All the data were processed and stored at the Laboratory of Haematology, Department Veterinary Clinic, University of Pisa, over the last 2 years, and involved samples withdrawn from both inpatients and outpatients of the clinic. The CBC is routinely requested as a part of a complete clinical evaluation of horses as well as during the course of disease or as a routine check during the training process. The CBC, using K3-EDTA blood sam- ples, included a three cell population count performed on an electronic impedance cell counter (Genius, SEAC, Calenzano, Fi, Italy), and the microscopic evaluation of a stained blood smear. In addition, the refractometric assessment of total plasma proteins and ¢brinogen (by the heat precipitation method) was also performed using EDTA plasma. The incidence of haematological changes in red blood cells (RBCs), subtyped as polycythaemia and anae- mia, were 16.2%. Anaemia totalled 15.1%, including mild (packed cell volume (PCV) 31^26%) at 10.2%, moderate (PCV 25^17%) at 4.1%, and severe (PCV 516%) at 0.8%. The incidence of white blood cell (WBC) changes, subtyped as leucocytosis and leucopenia, was 38.4%. Leucocytosis totalled 30.5%, including mild (WBC 10^15 000/ml) at 22.5%, moderate (WBC 15^20 000/ml) at 7.7%, and severe (WBC 420 000/ml) at 0.3%. The incidence of leucopenia was 7.9% (WBC 55500/ml). Inter- pretation of the full leucogram (including variation on several leucocyte types and ¢brinogen values) gave an incidence of physiological leucocytosis at 9.9%, stress leucocytosis at 5.3%, and in£ammatory leucocy- tosis at 37.3%. Thrombocytopenia was frequently observed at 7.2%, whereas thrombocytosis was observed in only 0.3% of cases. Horse CBCs display less characteristic blood pictures in comparison to other species due to their parti- cular haemopoietic system, such as the long half-life of RBCs, the occurrence of a non-sinusoid spleen, the fate and distribution of WBCs, and the rather high clumping phenomena of horse platelets in EDTA glass vials.

Haematological alterations observed in equine routine complete blood counts. Retrospective investigation

GAVAZZA, ALESSANDRA;GUGLIUCCI, BIANCAURORA;PASQUINI, ANNA;LUBAS, GEORGE
2002-01-01

Abstract

Results on more than 1000 complete blood counts (CBC) performed on hot-blooded horses, in- cluding Thoroughbred, Standardbred, and Arabian, have been reviewed. All the data were processed and stored at the Laboratory of Haematology, Department Veterinary Clinic, University of Pisa, over the last 2 years, and involved samples withdrawn from both inpatients and outpatients of the clinic. The CBC is routinely requested as a part of a complete clinical evaluation of horses as well as during the course of disease or as a routine check during the training process. The CBC, using K3-EDTA blood sam- ples, included a three cell population count performed on an electronic impedance cell counter (Genius, SEAC, Calenzano, Fi, Italy), and the microscopic evaluation of a stained blood smear. In addition, the refractometric assessment of total plasma proteins and ¢brinogen (by the heat precipitation method) was also performed using EDTA plasma. The incidence of haematological changes in red blood cells (RBCs), subtyped as polycythaemia and anae- mia, were 16.2%. Anaemia totalled 15.1%, including mild (packed cell volume (PCV) 31^26%) at 10.2%, moderate (PCV 25^17%) at 4.1%, and severe (PCV 516%) at 0.8%. The incidence of white blood cell (WBC) changes, subtyped as leucocytosis and leucopenia, was 38.4%. Leucocytosis totalled 30.5%, including mild (WBC 10^15 000/ml) at 22.5%, moderate (WBC 15^20 000/ml) at 7.7%, and severe (WBC 420 000/ml) at 0.3%. The incidence of leucopenia was 7.9% (WBC 55500/ml). Inter- pretation of the full leucogram (including variation on several leucocyte types and ¢brinogen values) gave an incidence of physiological leucocytosis at 9.9%, stress leucocytosis at 5.3%, and in£ammatory leucocy- tosis at 37.3%. Thrombocytopenia was frequently observed at 7.2%, whereas thrombocytosis was observed in only 0.3% of cases. Horse CBCs display less characteristic blood pictures in comparison to other species due to their parti- cular haemopoietic system, such as the long half-life of RBCs, the occurrence of a non-sinusoid spleen, the fate and distribution of WBCs, and the rather high clumping phenomena of horse platelets in EDTA glass vials.
2002
Gavazza, Alessandra; Delgadillo, A. J.; Gugliucci, Biancaurora; Pasquini, Anna; Lubas, George
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/72860
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