Some clinical manifestations and hematological indicators in white horses infected withTrypanosomiasis in Ha Noi

Abstract

The study was carried out on 9 white horses over 2 years old infected with Trypanosomiasis (Surra)
caused by T. evansi with the aim of identifying some clinical manifestations and hematological
indicators of the infected white horses. The studied results showed that the main clinical
manifestations in the T. evansi-infected white horses included: prolonged diarrhea (100%); weight
loss and fatigue (100%); intermittent fever (100%); epiphora, conjunctivitis and keratitis (80% and
70%); paralysis of legs, walking difficulty (40% and 25%). Red blood cell count, hemoglobin, and
hematocrit/packed cell volume (PCV) in the infected white horses decreased compared to the
healthy white horses (from 5.65 ± 0.45 T/L, 12.57 ± 0.23 g/dl, 33.19 ± 0.35% in the healthy white
horses down to 3.57 ± 0.95 T/L, 8.52 ± 0.57 g/dl, 27.35 ± 0.63% in the infected white horses).
Mean corpuscular volume (MCV) in the infected white horses increased compared to the healthy
white horses (47.98 ± 0.35 fL and 53.45 ± 0.56). White blood cell count and formula in the white
horses infected with Trypanosomiasis (Surra) caused by T. evansi experienced a clear change:
white blood cell count increased (from 9.98 ± 1.25 G/L in the healthy white horses to 11.14 ± 0.39
G/L in the infected white horses, neutrophil declined (from 23.16 ± 0.23% in the healthy white
horses to 16.07 ± 0.35% in the infected white horses), large mononucleosis dropped (from 7.60 ±
0.45% in the healthy white horses to 5.59 ± 0.37% in the infected white horses), eosinophils in the
infected white horses increased (from 7.04 ± 0.23% in the healthy white horses to 9.04 ± 0.25% in
the infected white horses).