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    Effect of dietary esterified glucomannan on performance, serum biochemistry and haematology in broilers exposed to aflatoxin
    (CZECH ACADEMY AGRICULTURAL SCIENCES, 2005) Basmacioglu, H; Oguz, H; Ergul, M; Col, R; Birdane, YO
    The amelioration of aflatoxicosis in broiler chickens was examined by feeding two concentrations of yeast component (esterified glucomannan; EG). EG, incorporated into the diet at 0.5 and 1 g/kg, was evaluated for its ability to reduce the detrimental effects of 2 mg total aflatoxin (AF; 82.72% AFB(1), 5.50% AFB(2), 10.20% AFG(1) and 1.58% AFG(2)) in diet on growing broiler chicks from 1 to 21 d of age. A total of 240 male broiler chicks (Ross-308) were divided into 6 treatment groups [control, AF, EG (0.5 g/kg), AF plus EG (0.5 g/kg), EG (1 g/kg), and AF plus EG (1 g/kg)]. Compared to the control, AF treatment significantly decreased body weight gain from week 2 onwards. AF treatment also caused significant decreases in serum total protein, albumin, total cholesterol, triglyceride, glucose, inorganic phosphorus, creatinine levels and alanine-aminotransferase (ALAT) activity but increased the aspartate-aminotransferase (ASAT) activity. Red blood cell, haematocrit, haemoglobin, thrombocyte, and lymphocyte counts and tibial crude ash levels were significantly reduced by AF treatment, while significant increases were seen in heterophil counts. The addition of EG (I g/kg) to an AF-containing diet significantly improved the adverse effects of AF on haematological parameters, total protein, albumin values and ASAT activity. EG (I g/kg) also partially improved body weight gains (59%) and the other biochemical parameters influenced by AF treatment. The addition of EG (both 0.5 and 1 g/kg) to the AF-free diet did not cause any considerable changes in the investigated values. These results clearly indicated that EG (I g/kg) addition effectively diminished the adverse effects of AF on the investigated values. Also, the higher dietary concentration of EG (I g/kg) was found more effective than the lower concentration (0.5 g/kg) against the adverse effects of AF on the variables investigated in this study.
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    Evaluation of the detoxifying effect of yeast glucomannan on aflatoxicosis in broilers as assessed by gross examination and histopathology
    (TAYLOR & FRANCIS LTD, 2005) Karaman, M; Basmacioglu, H; Ortatatli, M; Oguz, H
    1. We evaluated the efficacy of yeast glucomannan ( Mycosorb(R)), incorporated into the diet at 0.5 and 1 g/ kg, in reducing the detrimental effects of 2mg aflatoxin/ kg diet on growing broiler chicks from 1 to 21 d of age. 2. A total of 240 male broiler chicks ( Ross- 308) was divided into 6 treatment groups [ Control, Aflatoxin ( AF), Yeast glucomannan ( YG; 0.5 g/ kg), AF plus YG ( 0.5 g/ kg), YG ( 1 g/ kg), and AF plus YG ( 1 g/ kg)]. 3. Ten chicks from each of the 6 groups were slaughtered and pathological examinations were performed on the liver, bursa of Fabricius, thymus, spleen and kidney. 4. The aflatoxin treatment caused moderate to severe hydropic/ fatty degeneration in the hepatocytes of the liver and the tubular epithelium of the kidneys, and follicular depletion in the bursa of Fabricius, thymus and spleen. 5. Yeast glucomannan added to the aflatoxin- containing diet at 0.5 and 1 g/ kg diminished the severity of pathological changes, slightly and moderately, respectively. The number of affected organs was also reduced in the group given 1 g/ kg yeast glucomannan, compared to the aflatoxin group. 6. These results show that yeast glucomannan effectively diminished the adverse effects of aflatoxin on the pathological changes and that the higher concentration of yeast glucomannan ( 1 g/ kg) was more effective than the lower concentration ( 0.5 g/ kg) and itself had no adverse effect.