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Öğe Development of Denizli x White Leghorn F-2 population for quantitative trait loci mapping(WILEY-BLACKWELL, 2009) Nizamlioglu, M.; Garip, M.; Yilmaz, A.; Caglayan, T.; Kurar, E.; Bulut, Z.; Kurtoglu, V.[Abstract not Available]Öğe Effects of adding yeast cell walls and Yucca schidigera extract to diets of layer chicks(TAYLOR & FRANCIS LTD, 2011) Gurbuz, E.; Balevi, T.; Kurtoglu, V.; Oznurlu, Y.1. This research was conducted to determine the impact of diet supplementation with yeast cell walls and Yucca schidigera extract on the growth performance, antibody titres, and intestinal tissue histology of layer chicks. 2. White, 1-d-old, Hy-Line hybrid chicks (n = 840) were divided into 4 main groups, each comprising 7 replicates of 30 chicks (n = 210): (1) control; (2) 1000 mg/kg yeast cell walls (YCW) added; (3) 1000 mg/kg Yucca schidigera extract (YE) added; and (4) 500 mg/kg YE + 500 mg/kg YCW added. The trial lasted 60 d. 3. Daily weight gain of the chicks was positively affected between d 45-60 in the YE and YCW + YE groups compared with the control group. 4. Overall, feed consumption did not differ between the control and YCW, YE, YCW + YE groups during the 60 d study period. Feed efficiency was better in the YE and YCW + YE groups than in the control group between d 1-60. 5. During the 60 d evaluation period, live weight gain, and final live weight were higher in YE and YCW + YE groups than in the control group. 6. Antibody titres against infectious bronchitis and infectious bursal disease did not differ among the 4 treatments, but those for Newcastle disease were higher in the YE + YCW groups than in the control, YCW and YE groups on d 45. 7. There were differences in intestinal histomorphometry between the 4 treatments. The height of the jejunal and ileal villi was greater in the YE and YCW + YE groups than in the control and YCW groups 8. It can be concluded that YCW and YE supplementation for layer chicks is beneficial for growth performance and intestinal histology during the 1-60 d growing period.Öğe Effects of boron supplementation to the diet on tibia mineral concentrations, peripheral blood leucocytes percentages and some selected variables of layers(EUGEN ULMER GMBH CO, 2007) Kurtoglu, V.; Kurtoglu, Firuze; Sur, E.; Bulut, Z.; Onder, F.In this study the effects of 0, 50, 100, 150, 200 and 250 mg/kg boron (B) supplementation to diets of laying hens on tibia B, Ca and P (inorganic) concentrations, tibia weight and ash levels (in % and g DM), leucocyte counts (PBL) and positivity of ANAE percentages in peripheral blood were investigated. Boron caused significant (P<0.001) increases of tibia B concentrations but decreased tibia Ca level (P<0.001). Supplementation of B did not affect tibia ash and weight. Whole blood haematocrit and haemoglobin counts were insignificantly (P>0.05) increased by B additions. There was no effect of B supplementation on peripheral blood ANAE percentages and splenic plasma cell counts (SPCC). In general, evidence from this study suggests that the effects of B supplementation on mineral metabolism may be modified by treatment time, the age of the birds, or the type of animal used. But, further research is needed in order to investigate the interaction between B and Ca to obtain maximum beneficial effects on bone metabolism of laying hens.Öğe Enzyme histochemical and serological investigations on the immune system from chickens treated in ovo with aflatoxin B-1 (AFB(1))(ECOLE NATIONALE VETERINAIRE TOULOUSE, 2011) Sur, E.; Celik, I.; Oznurlu, Y.; Aydin, M. F.; Oguz, H.; Kurtoglu, V.; Ozaydin, T.In this study, the detrimental effects of in ova administrated antitoxin B-1 (AFB(1)) on the immune system of chickens in the post-hatching period were investigated by enzyme histochemical and serological methods. For this purpose, 730 laying hen eggs were divided into 7 groups [3 control groups (not-treated, drilled-sealed and 30% ethanol (solvent)-injected groups) and 4 assay groups in which eggs were injected with increasing AFB(1) doses (2.5, 7.5, 12.5 and 17.5 ng/egg)] then conventionally incubated. The chickens were vaccinated against the Newcastle Disease (ND) and the Infectious Bursal Disease (I BE)) viruses on days 2, 5, 20 and on days 10 and 15 post-hatching, respectively. The serum antibody titres were assayed at the 1(st) and 28(th) days using Haemagglutination-Inhibition Test and ELISA respectively. The proportions of the peripheral blood lymphocytes (PBL) and the ANAE (alphanaphtyl acetate esterase) or ACP-ase (acid phosphatase) positive lymphocytes/PBL ratios were determined on the days 1, 10,20 and 28. The AFB(1)-treatment caused significant decreases in both the ANAE and ACP-ase positivity ratios of PBL., depending on the AFB(1) dose, during the post-hatching period, but the PBL counts were significantly depressed at the end of the experimental period only in chickens treated in ovo by the highest AFB(1) close (17.5 ng/egg). The anti-IBD antibody titres measured on the hatching day (maternal antibodies) and the anti-ND and IBD antibody titres measured on the day 28 post-hatching were significantly reduced in chicks treated with 12.5 and 17.5 ng AFB(1)/egg compared to the controls and have also gradually declined according to the AFB(1) dose. The results clearly evidenced that AFB(1) transferred into the fertilised eggs has caused deficiency in cellular and Immoral immunity and particularly in the embryo transfer of the maternal antibodies, that can partially explain the observed immunosuppressive AFB(1) effects in poultry.
