Abstract:
Investigations were
conducted on the Bălțată Neagră
Românească (BNR) breed dairy cows from
the Dancu Research and Development
Station for Cattle Breeding, Iaşi County. We
have carried out hematologic profile
investigations (red and white blood cells) in
cattle having reproductive troubles and
clinically healthy cattle, divided into groups
of 10 animals: four experimental groups –
cows with puerperal genital infections (E1),
cows with chronic genital infections (E2),
cows with postpartum anestrus (E3) and
cows with repeated inseminations (E4), as
well as three control groups, made of cows
at different stages of lactation: early, 0-2
months (M1), advanced, 4-6 months (M2)
and late, 6-7 months (M3). Hematologic
analyzes have shown variations according to
the type of reproductive troubles and to the
stage of lactation: in cows having puerperal
genital infections (E1 Group), compared to
the control group (M1), lower values of red
blood cells (5.74±0,2 x106/μl), hematocrit
(Ht), (28.40±0.47%) and haemoglobin (Hb)
(9.20±0.30 g/dl) were found and higher
values of the total number of leucocytes
(9.0±0.50 x103, compared to 7.7±0.30 x103,
p<0.05), 7.7±0.30 x103, p<0.05),
represented by neutrophils (56.0±0.60 %,
compared to 34.2 ±0.6%, p<0.05). The cows
with chronic genital infections (E2 Group) in
comparison to the M2 Group had lower
values of red blood cells, hematocrit and
haemoglobin and higher values of the total
number of leucocytes (8.2 ±2.12 x103/μl,
vs. 7.26 ±1,04 x103/μl), with a high
neutrophil number (39.5±0.67 %, vs. 35.66
± 1.66%). In cows having postpartum
anestrus (E3 Group), lower values of
erythrocytes and haemoglobin and slightly
higher values of leukocytes with a great proportion of neutrophils. In cows with
repeated inseminations (E4 Group), there
were diminutions in the erythrocyte number
and increased number of neutrophils. Once
with the lactation curve from early stage
(M1 Group) to advanced stage (M2) healthy
cows have recorded variations of
erythrocyte indices, determined by the
increasing level of the milk production,
marked by the diminution of the number of
erythrocytes and hematocrit and the
moderate increase of haemoglobin.
