Body condition score, nonesterified fatty acids and beta-hydroxybutyrate concentrations in goats with subclinical ketosis

V. Marutsova*, R. Binev

Department of Internal Diseases, Faculty of Veterinary Medicine, Trakia University, 6000 Stara Zagora, Bulgaria (Manuscript received 29 May 2017; accepted for publication 31 October 2017)

Abstract. Studies were conducted to establish the influence of the values of β-hydroxybutyric acid (ВНВА) and non-esterified fatty acids (NEFA) in the blood on the assessment of body condition score (BCS) of goats with subclinical ketosis (SCK). A total of 113 dairy goats with yearly milk yield of 680 L, in their 2nd to 3rd lactation and average body weight 50-60 кg were included in the study. The goats were divided in three groups: І group (n=27) – pregnant (from pre-partum days 15 to 0); ІІ group (n=28) – recently kidded (from postpartum days 0 to 15) and ІІІ group (n=58) – lactating (from postpartum days 30 to 45). It was established that the quantity of BHBA in goats from control groups I, II and III were between 0.17±0.11 mmol/l and 0.56±0.11 mmol/l. In goats from the three groups with SCK signs, blood BHBA was statistically significantly elevated vs control goats – from 0.88±0.11 mmol/l to 1.2±0.42 mmol/l (р<0.001). Blood ВНВА <0.8 mmol/l in goats are indicative a good transition from pregnancy to lactation, whereas an amount between 0.8 mmol/l and 1.6 mmol /l are indicative of the SCK. Blood BHBA concentrations indicative for clinical ketosis were not established in goats from the three groups (ВНВА <1.6 mmol/l). The body condition scores (BCS) of goats from the control groups was within the reference range – 2.45±0.3 – 2.85±0.2, whereas in goats with SCK – declines of varying degrees of reliability. In goats from the three groups with SCK signs, blood NEFA was statistically significantly elevated vs control groups.

Clinical and haematological studies on subclinical lactational ketosis in dairy goats

R. Binev1*, V. Marutsova1, V. Radev2

1Department of Internal Diseases, Faculty of Veterinary Medicine, Trakia University, 6000 Stara Zagora, Bulgaria
2Department of Animal Morphology, Physiology and Nutrition, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria

Abstract. The most common metabolic diseases in small ruminants are peri-parturient hypocalcemia, pregnancy toxemia (ketosis), rumen acidosis and hypomagnesaemia. While pregnancy toxemia is well known medical condition, lactational ketosis is almost unknown in small ruminant practice. A total of 58 dairy goats, up to day 30 of lactation were included in the study. Clinical examination (rectal temperature, heart rate, respiratory rates, rumen contractions and inspection of conjunctival mucous membrane), BCS and determining the values of β-hydroxybutyrate was performed on all goats. Animals were divided into two groups, control one consists of 30 goats (BCS > 2.0 and concentration of β-hydroxybutyrate < 0.8 mmol/l), and second group consists of 28 goats with subclinical lactational ketosis (BCS ≤2.0 and concentration of β-hydroxybutyrate ≥0.8 mmol/l). Blood samples were obtained and analyzed for red blood cell (RBC, Т/l), haemoglobin (HGB, g/l), haematocrit (HCT, l/l), mean corpuscular volume (MCV, fl), mean corpuscular haemoglobin (MCH, pg), mean corpuscular haemoglobin concentration (MCHC, g/l), white blood cell counts (WBC, G/l), lymphocytes (LYM, %), monocytes (MON, %), granulocytes (GRA, %), red blood cell distribution width (RDW, %) and red blood cell distribution width absolute (RDWa, fl). From our study, no changes were found in the examined clinical signs. Haematologic analysis showed changes in the quantities of erythrocytes, while the other parameters (HGB, HCT, MCV, MCH, MCHC, WBC, LYM, MON, GRA, RDW and RDWa) fluctuated around control values.

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