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Won, Ga-Yeon,Moon, Bo-Mi,Oh, In-Gyeong,Matsuda, Kiku,Chaudhari, Atul A.,Hur, Jin,Eo, Seong-Kug,Yu, Il-Jeoung,Lee, Young-Ju,Lee, Yun-Sik,Kim, Byeong-Su,Lee, John Hwa Japan Poultry Science Association 2009 Journal of Poultry Science Vol.46 No.3
<P>The colibacillosis caused by avian pathogenic <I>E. coli</I> (APEC) is responsible for a significant loss of productivity and mortality in the poultry industry. The pathogenicity of these bacteria is based on the presence and expression of various virulence factors. In this study, the presence of the 19 virulence-associated genes in APEC was determined using PCR. Among the 118 <I>E. coli</I> isolates from the chickens with colibacillosis, all contained at least one of the 19 genes as approximately 95% of the isolates contained <I>fimC.</I> Interestingly, the <I>clpG</I> gene, which has not been detected in APEC previously, was detected in half of the isolates. The ColV plasmid-associated genes such as <I>colV, tsh, iucC, iucD and iss</I> genes were also detected in 57.6, 55.9, 50.0, 47.5, 47.5 and 41.5% of isolates, respectively. With regard to the fimbrial genes, the <I>papA</I> (14.4%), papC (14.4%) and <I>papG</I> genes (15.2%) were identified at relatively low rates, none of the isolates harbored <I>afa8D, f17A</I> or <I>facA</I>, and only 3 of the isolates (2.5%) contained <I>eaeA.</I> In this study, 94 isolates harbored two or more of the genes, and there were 43 different patterns of gene combination in the isolates. The most common pattern, which was found in 14.4% (17 isolates), was <I>clpG-fimC-iutA-colV-tsh-iucC-iucD-irp2-fyuA-vat-iss.</I> Overall, these results suggest that APEC strains in this area commonly contain multiple virulence factors and approximately half of the APEC strains contained the ColV plasmid-associated genes. Especially, <I>colV</I> and <I>tsh</I> were detected more than half of the isoaltes.</P>
Jang, I.,Ko, Y.,Kang, S.,Kim, S.,Song, M.,Cho, K.,Ham, J.,Sohn, S. JAPAN POULTRY SCIENCE ASSOCIATION 2014 Journal of Poultry Science Vol.51 No.1
The present study was conducted to investigate the effects of two dietary lutein sources such as the commercial lutein and the emulsified crude extract of spinach containing lutein on the transfer of lutein into egg yolks as well as the antioxidant defense system in the liver of laying hens. A total of thirty-six, 24-week-old White leghorn hens were randomly assigned to a basal diet (CON) and that supplemented with a commercial lutein (LUT, 40 mg lutein /kg of diet) and the crude extract of spinach dissolved into oils with lecithin (ECE, 40 mg lutein/kg of diet) for 5 weeks. There was no difference in body weight and the relative live weight among dietary groups. The concentration of egg yolk lutein and yolk color significantly increased (P<0.05) in the LUT and ECE groups compared with the CON group. The LUT group showed a higher yolk lutein and much a lower variability of average yolk lutein content, although there was no significant difference in egg yolk lutein content between the LUT and BCE groups. In antioxidant activity, the specific activity of hepatic superoxide dismutase (SOD) in the LUT group was significantly (P<0.05) greater than that in the CON and ECE groups, whereas glutathione peroxidase (GPX) and glutathione S-transferase (GST) activities and lipid peroxidation were not affected by dietary sources of lutein. In conclusion, the dietary supplementation of lutein and the emulsified crude extract of spinach to laying hens resulted in a significant increase in the content of egg yolk lutein and yolk color, indicating that both supplements may potentially be applicable for the production of egg-enriched lutein in laying hens. This study also suggest that a commercial lutein more consistently produces the quality of lutein-enriched eggs and improves hepatic SOD activity compared with the emulsified crude extract of spinach.
Avian Biotechnology: Insights from Germ Cell-mediated Transgenic Systems
Song, Gwonhwa,Park, Tae Sub,Kim, Tae Min,Han, Jae Yong Japan Poultry Science Association 2010 Journal of Poultry Science Vol.47 No.3
<P>Aves species have become valuable models for numerous experimental and biotechnological purposes due to their unique embryological and physiological traits. This review integrates recent progress and new insights into the molecular and physiological mechanisms of transgenic fowl production. Recent reports have indicated that birds are essential for studying vertebrate development and the conservation of endangered bird species, as well as serving as bioreactor hens. Over the last decade, germ cells and genetic modification have become pivotal components for the production of transgenic animals. Three prerequisites must be met for successfully producing transgenic fowl: the effective manipulation of various types of avian pluripotent cells without the loss of differentiation capacity, the manipulation of genes of interest without altering normal gene function, and increasing the efficiency of germ line chimera production. An understanding of the cellular and molecular signals that regulate germ cells as well as the development of a stable gene delivery method will make these species indispensable tools for basic research and biotechnological applications.</P>
Identification of <i>MC1R </i>SNPs and their Association with Plumage Colors in Asian Duck
Sultana, Hasina,Seo, Dong-Won,Park, Hee-Bok,Choi, Nu-Ri,Hoque, Md. Rashedul,Bhuiyan, Md. Shamsul Alam,Heo, Kang-Nyeong,Lee, Seung-Hwan,Lee, Jun-Heon Japan Poultry Science Association 2017 Journal of Poultry Science Vol.54 No.2
Effects of Supplementary Blood Meal on the Content of Carnosine and Anserine in Broiler Meat
Auh, JoongHyuck,Namgung, Nyun,Shin, KwangSuk,Park, SeWon,Paik, InKee Japan Poultry Science Association 2010 Journal of Poultry Science Vol.47 No.4
<P>The objective of this research was to evaluate the effects of dietary supplementation of blood meal (BM) on carnosine (L-Car) and anserine (L-Ans) content in the chicken breast muscle (CBM). In Experiment 1,384 Ross® broiler chicks of 1d old were assigned to 3 dietary treatments: 100% basal diet (BM-0), 95% basal diet+5% BM (BM-5), and 90% basal diet+10% BM (BM-10). In Experiment 2, 144 Ross® broiler chicks of 1 d old were fed BM-treated diets, including 0% BM (BMI-0), 5% BM (BMI-5), and 10% BM (BMI-10), with isocalorie and isonitrogen adjustment. Broilers were reared in stainless steel cages for 5wk in both experiments. In Experiment 1, the content of L-Car and L-Arg increased as the birds aged. The increase was quadratic in L-Car and linear in L-Ans. The content of L-Car linearly (<I>P</I><0.01) increased as the level of BM increased at wk 4 and 5, but there was no significant difference between BM-5 and BM-10 treatment. Conversely, the content of L-Ans linearly (<I>P</I><0.01) decreased as the level of BM increased at wk 1, 3, 4, and 5. In Experiment 2, the content of L-Car and L-Arg showed quadratic increase as the birds aged. The content of L-Car showed a significant (<I>P</I><0.01) negative quadratic response as the level of BM increased at wk 1, 3, and 5. The content of L-Ans showed a significant (<I>P</I><0.05) positive quadratic response as the level of BM increased at wk 3 and 5. The growth performances were not significantly affected by treatments in Experiment 1; in Experiment 2, however, a linear decrease (<I>P</I><0.01) in feed intake and weight gain, and a linear increase (<I>P</I><0.01) in feed conversion ratio were observed as the BM was increased. In conclusion, addition of 5% BM in broiler diet increases the L-Car but not L-Ans in CBM.</P>