Person: UDUM, DUYGU
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UDUM
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Publication Erythrocyte potassium, sodium and GSH concentrations of Saanen and Turkish hair breeds of goats(Zoological Soc Pakistan, 2008-01-01) Aydın, Cenk; Doğrutekin, Deniz; Udum, Duygu; Çetin, Meltem; AYDIN, CENK; Doğrutekin, Deniz; UDUM, DUYGU; Çetin, Meltem; Veteriner Fakültesi; Fizyoloji Ana Bilim Dalı; 0000-0002-3090-0099; 0000-0001-7052-1694; AAH-5167-2021; DWC-5118-2022; ESX-0896-2022; HQE-4960-2023Biochemical variation of three genetic markers, namely erythrocyte potassium (K-e), erythrocyte sodium (Na-c) and erythrocyte glutathione (GSH) in sixty Saanen and Turkish Hair Goats was analysed. The potassium and sodium concentrations were determined by flame photometry. The level of GSH in erythrocytes was determined by the DTNB method. The frequencies of the mentioned loci have been calculated and compared with some of the goat breeds studied so far by other authors. Our results indicated that there were bimodal distributions in K-e and GSH concentrations in Saanen goat breeds, whereas there was only GSH polymorphism in Turkish Hair Goats. The distribution of K-e concentrations Suggested the presence of high-K/low-K (HK/LK) polymorphism, based on the predetermined dividing value of 50 meq/L of K-e concentration in erythrocytes of Saanen Goats. Both types are shown to be controlled genetically by an autosomal locus with two alleles HK and LK, with HK being dominant over LK. While majority of the Turkish Hair Goat population (93%) had low (GSH(h)) or 'deficient' erythrocyte GSH concentrations (<50 mg/100 mL erythrocyte), Saanen breeds (93%) had high (GSH H) erythrocyte GSH levels. Relationships between the parameters were also evaluated. In Saanen Goats, erythrocyte K-e and Na-e values exhibited positive correlation with the total monovalent cation concentrations (K-e + Na-e) while in Turkish Hair Goats only K-e value showed correlation with the same monovalent cations.Publication Ovarian follicle dynamics and hormonal changes during early pregnancy in saanen goats(Czech Academy Agricultural Sciences, 2020-01-01) Doğan, İbrahim; Toker, Mehmed Berk; Alcay, Selim; Küçükşen, Duygu Udum; DOĞAN, İBRAHİM; TOKER, MEHMED BERK; ALÇAY, SELİM; UDUM, DUYGU; 0000-0003-1976-1814; 0000-0003-4033-9749; A-2794-2014; R-8366-2018; CBC-7350-2022; FGX-3813-2022This study is aimed at describing the ovarian follicular dynamics, corpora lutea and their hormonal control during early pregnancy in Saanen goats. The ovaries of pregnant goats (n = 10) were monitored daily for follicles (>= 2 mm) and corpora lutea by transrectal ultrasound over the 35 days after mating. Blood samples were collected by jugular venipuncture at the time of ultrasonography and were analysed for the concentrations of oestradiol (E-2) and progesterone (P-4), inhibin, FSH (follicle-stimulating hormone) and LH (luteinizing hormone). The pattern of follicular growth was characterised by five (n = 2; 20 %), six (n = 5; 50 %) and seven (n = 3; 30 %) follicular waves during early pregnancy. The first corpora lutea (size 6.8 +/- 0.4 mm, mean + SEM) were detected at 5.0 +/- 0.3 days after the mating with a maximum diameter (12.2 +/- 0.3 mm) observed on day 24.0 +/- 1.1 of pregnancy. The dominant follicle diameter of waves 1 and 4, and the duration of waves 1-4 and 7 were maximal during the early pregnancy period (P < 0.05). In addition, the inter-wave interval of the 5 waves was significantly (P < 0.05) longer compared to the six and seven inter-wave intervals (7.0 +/- 0.1, 5.8 +/- 0.1 and 5.0 +/- 0.2 days, respectively). Although the number of small and medium-sized follicles did not differ with the days post-breeding, the number of large-sized follicles in the same period significantly decreased between 16 and 26 days and was negatively correlated with the period of pregnancy (P < 0.05). The plasma LH and E-2 concentrations were negatively correlated with the P-4 concentration. The inhibin concentrations were negatively correlated with FSH, but positively correlated with the number of large-sized follicles. These results indicate that ovarian follicular growth during the first 35 days of pregnancy in goats was characterised by a wave-like pattern and there was a close relationship between the number of FSH peaks and the number of follicular waves.Publication Effect of hCG administration on ovulation and estrus in Saanen goats subjected to short-term estrus synchronization protocol during the breeding season(Hellenic Veterinary Medical Soc, 2023-04-01) Doğan, I.; Toker, M. Berk; Aktar, A.; Yılmaz, M. M.; Udum, D.; DOĞAN, İBRAHİM; TOKER, MEHMED BERK; Aktar, Ahmet; Yılmaz, Mehmet Melih; UDUM, DUYGU; Veteriner Fakültesi; Döllenme ve Suni Tohumlama Ana Bilim Dalı; 0000-0003-1976-1814; 0000-0002-2975-2594; 0000-0001-6050-791X; 0000-0001-7052-1694; A-2794-2014; R-8366-2018; GWC-2055-2022; AAH-5167-2021; CBC-1744-2022This study aimed to compare the effect of hCG administered at 24 or 36 h following a short-term estrus synchronization treatment on the ovulation time and estrus parameters in non-lactating Saanen goats during the breeding season. The estrus cycles of does were synchronized with an intravaginal sponge containing 60 mg of medroxyprogesterone acetate (MAP) for six days, and an injection of 125 & mu;g of d-cloprostenol at the time of sponge insertion in addition to an injection of 300 IU of eCG 24h before sponge removal.After removal of the sponges, does were injected intramuscularly either 1 ml physiological saline(0.9% NaCl) solution after 12 h (Group1/Control; n=10), 100 IU hCG after 24 h (Group2; n=9) or 100 IU hCG after 36 h (Group3; n=9). Estrus behavior after sponge removal was observed twice daily for 84 h using teaser bucks and transrectal ovarian ultrasonography was performed twice a day for seven days to determine small, medium and large follicle numbers, luteal development and the time of ovulation.Blood samples were collected on the same days to determine serum progesterone (P4) and estradiol (E2) concentrations. No significant differences were observed in terms of estrus parameters, ovarian structure and serum P4 and E2 concentrations between the hCG-treated groups and the control group.Average values observed for all groups: estrus response (53.57%), the interval from sponge removal to estrus and ovulation (35.2 h and 67.86 h, respectively), duration of estrus (18.4 h), the interval from estrus onset to ovulation (50.37 h), ovulation rate (96.43%), number of ovulations (1.36), ovulatory follicle diameter (6.86 mm), corpus luteum diameter (8.22 mm), follicle and luteal growth rate (1.17 and 0.68 mm/day, respectively). In conclusion, administration of hCG at 24 or 36 h following a short-term estrus synchronization protocol does not affect ovulation time, estrus parameters, and serum P4 and E2 concentrations in goats during the breeding season.Publication Effects of rosemary essential oil as a feed additive on performance, rumen fermentation, and blood parameters in preweaning holstein calves(Hellenic Veterinary Medical Soc, 2023-07-01) Bıyık, F.; Biricik, H.; Ürkmez, E.; Kara, C.; Çetin, I.; Udum, D.; Bıyık, F.; BİRİCİK, HAKAN; Ürkmez, E.; KARA, ÇAĞDAŞ; UDUM, DUYGU; Veteriner Fakültesi; Biyokimya Ana Bilim Dalı; 0000-0001-7051-1349; AAH-4032-2021; AAH-5167-2021; EPB-3936-2022; HHL-7869-2022; HKL-2630-2023The objective of this study was to investigate the effects of rosemary essential oil (REO) supplemen- tation on growth performance, blood metabolites and rumen fermentation in calves throughout the suckling period. Fourty Holstein calves were randomly divided to four dietary groups. Each group consisted of 10 calves; control with no REO supplementation (CON), supplementation of 500 mg/d REO (REO1), supplementation of 1000 mg/d REO (REO2) and supplementation of 2000 mg/d REO (REO3). REO supplementation quadratically increased (P<0.05) the calf starter (CS) intake, average daily gain (ADG) and feed efficiency. Calves fed REO1 and REO2 had the highest CS intake and ADG. Ruminal ammonia-N concentration was lower (P=0.02) for calves fed REO3 than calves fed REO1, but total volatile fatty acids concentration was higher (P<0.01) for calves fed REO1 compared with calves fed CON and REO3. The concentrations of ghrelin, NEFA and BHBA increased linearly (P<0.05) with increasing levels of REO. Calves fed REO2 and REO3 had the highest concentration of ghrelin. Cholesterol concentration decreased linearly (P<0.01) with increasing REO levels on d 56. Calves fed REO2 and REO3 had the lowest cholesterol concentration. Also, serum IgG concentration was higher (P<0.01) in calves fed REO2 and REO3 compared with calves fed CON on d 28. It was concluded that the addition of different amounts of rosemary essential oil can positively change some rumen and blood metabolites of calves, as well as the supplementation of REO may have a beneficial effect on growth performance by increasing ghrelin.Publication Determination of the relationships between serum amyloid A, serum calprotectin and fecal calprotectin in healthy and infectious diarrheic calves and their diagnostic significances as inflammatory markers(Elsevier Sci Ltd, 2023-10-11) Karakuş, Adil Ömer; Temizel, Ethem Mutlu; Udum, Duygu; Karakuş, Adil Ömer; TEMİZEL, ETHEM MUTLU; UDUM, DUYGU; Veteriner Fakültesi; İç Hastalıkları Ana Bilim Dalı; 0000-0001-7052-1694; JSG-9381-2023; ECV-4083-2022; AAH-5167-2021In this study, serum amyloid A (SAA), serum calprotectin (SCalp) and fecal calprotectin (FCalp) levels were investigated in neonatal calves with infectious diarrhea. Total of 70 calves were divided into E. coli, C. parvum, C. parvum + viral, viral and control groups. Clinical parameters were recorded on days 0 and 7, post treatment. On these days, blood and stool samples were also taken. SAA, SCalp and FCalp levels were measured with commercial ELISA kits. Mean SAA levels on day 0 were measured as 0.54 (0.16-2.18) ng/ml and 38.40 (8.28-83.96) ng/ml for the diarrhea and healthy group, respectively (P < 0.001). Statistically significant difference was also obtained between the diarrhea [68.02 ng/ml 46.66-101.67] and control [24.05 ng/ml 11.92-56] groups in terms of SCalp levels on day 0 (P < 0.001). Cut-off value of SCalp to distinguish E. coli originated diarrhea from viral diarrhea was found to be 70.969 ng/ml (Sens: 94%). FCalp levels on day 0 were 93.08 (22.17-122.88) ng/ml and 87.01 +/- 3.33 ng/ml in the diarrhea and healthy groups, respectively (P = 0.04). Cut-off concentration of FCalp was found to be 91.804 ng/ml (P = 0.0057). In addition, as a result of the logistic regression analysis, FCalp's ability to identify animals with diarrhea was found to be 6.316 times (P = 0.009) higher. The highest levels of SCalp and FCalp measured on day 0 were found among E. coli group. As a result, the importance of FCalp and SCalp in diagnosing the status of infectious diarrhea in calves for the first time in the veterinary literature is emphasized.