• Korean Journal of Poultry Science
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• v.30 no.1
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• pp.29-34
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• 2003

It has been well documented that white egg layers are far more resistant to fowl typhoid than the brown egg layers. In Korea, however, most consumers prefer brown eggs to white ones. Therefore, a study was conducted to Produce fowl typhoid-resistant crossbred layers producing somewhat brown-colored eggs. Several crossbred strains were obtained from crossbreeding white egg lines (W) with brown egg lines (B). These crossbred layers (W${\times}$B) produced eggs with varying degrees of brown-colored shells between the white eggs obtained from W (White) and the brown eggs from B (Brown). Eggs from the peak stage of production were collected and their eggshell color values were measured. The mean eggshell color values of White and Brown were 81.9 and 36.4, respectively. Eggs from the crossbred lines (W${\times}$B) were collected, and their eggshell color values were measured to re-group these eggs according to their color. The mean eggshell color values of Trt-White, Middle, and Trt-Brown were 70, 60, and 50, respectively (Fig. 1). A total of 247 people living in Daejeon area, mainly housewives, took part in this survey. First, they were offered eggs with varying degrees of eggshell color in a paper egg-tray, together with a questionnaire. After they filled out the first questionnaire, they were instructed that the eggshell color has nothing to do with its nutritive value. In the second questionnaire, their preference on both eggshell color and price, i.e., purchasing will, were investigated. In the first questionnaire, the Brown (eggshell color lightness 36.4) were most preferred, and the Trt-white (eggshell color lightness 70) were least preferred. No statistical significance was detected between Brown and Trt-Brown, and White and Trt-White. In the second questionnaire, the trend was the same as in the first. Although no significant difference was found between Trt-Brown and Brown, however, the Trt-Brown were most preferred, surpassing the Brown. In conclusion, regardless of the nutritive values, the Korean consumers prefer brown eggs to white ones, and this trend could be changed gradually through consumer education.

• Journal of Microbiology
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• v.45 no.2
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• pp.179-184
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• 2007

Pasteurella multocida, a Gram-negative facultative anaerobic bacterium, is a causative animal pathogen in porcine atrophic rhinitis and avian fowl cholera. For the development of recombinant subunit vaccine against P. multocida, we cloned and analyzed the gene for outer membrane protein H (ompH) from a native strain of Pasteurella multocida in Korea. The OmpH had significant similarity in both primary and secondary structure with those of other serotypes. The full-length, and three short fragments of ompH were expressed in E. coli and the recombinant OmpH proteins were purified, respectively. The recombinant OmpH proteins were antigenic and detectable with antisera produced by either immunization of commercial vaccine for respiratory disease or formalin-killed cell. Antibodies raised against the full-length OmpH provided strong protection against P. multocida, however, three short fragments of recombinant OmpHs, respectively, showed slightly lower protection in mice challenge. The recombinant OmpH might be a useful vaccine candidate antigen for P. multocida.

• KOREAN POULTRY JOURNAL
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• v.39 no.1 s.447
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• pp.97-101
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• 2007

조류 인플루엔자는1878년 이탈리아에서 가금페스트(Fowl plaque)로 처음 알려진후 국내에서는 1996년 3월 경기도 화성지역종계장에서H9N2 저병원성조류인플루엔자가 첫 발생되었고 그 이후 계속적으로 전파되어 현재는 전국적인 발생양상을 보이고 있다. 고병원성인플루엔자의 경우에는 2003년 12월 첫발생 이후 2004년 초 종식선언을 한 후 2006년 11월말경 재발생되었다. 500m반경내 살처분 및 추가발생 이후 3km로 범위를 확대하여 살처분하였고 종식되는 듯 보였으나 12월 11일 전북 김제소재 메추리농장에서 추가발생한데 이어 21일 충남 아산 종오리농장에서도 발생하면서 많은 양계관련인들의 가슴을 아프게 하고 있다. 한번의 뼈아픈 경험을 통해 농장 및 당국의 빠른 초동방역 및 대처로 2003년 보다는 체계적이고 성숙된 모습을 보이고 있어 이 위기를 잘 대처해 나아가리라 생각해 본다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.23 no.5
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• pp.827-831
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• 1994

Investigation on the extractability, Mg2+-, Ca2+ , EDTA-ATPase activity and solubility of actomyosin prepared from leg and breast muscle of silky fowol were as follows. The extractability of actomyosin in leg and breast muscle was 779mg/100g and 1, 318mg/100g respectively, breast muscle was higher than leg muscle . Mg2+-ATPase activity of actomyosin was high inionic strength 0.02-0.10 and Mg2+ATPase activity of low ionic strength was higher than high ionic strength not related to the part. Ca2+ ATPase activity was high in ionic strength 0.05-0.13, the activity of leg muscle was higher that breast muscle. And EDTA-ATPase activity showed low in low ionic strength and showed high in high ionic strength, and increased greatly depend ionic strength up to 0.4. The solubility of actomyosin was not different in leg and breast muscle , the solution started in KCI concentration of 0.3M and ended in DCI concentration of 0.4M.

• Korean Journal of Poultry Science
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• v.14 no.1
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• pp.63-68
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• 1987

To obtain the basic data applicable for the breed preservation, hemogram and blood chemical values in Korean native Ogol fowls were investigated. The results obtained were summarized as follows; 1. Erythrocytic and leukocyte counts did not show the significant differences along with growth and further differences in both male and female were not significant. 2. In blood chemical values, total Protein and blood glucose showed a tendency of increase with age in both sexes and cholesterol figured constant level at any ages in both sexes. In general, however, the values of cholesterol of male were higher than those of female.

• Korean Journal of Veterinary Research
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• v.47 no.3
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• pp.285-290
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• 2007

The occurrence of hydropericardium-hepatitis syndrome was confirmed for the first time in Korea from chickens submitted for diagnosis to our laboratory from broiler and baeksemi farms. Clinical signs included depression, inappetence, ruffled feathers and an increase in mortality. At necropsy, severe hydropericardium and hepatic necrosis was characteristically found. The most remarkable microscopic changes were seen in the liver, including basophilic intranuclear inclusion bodies in the hepatocytes, massive hemorrhages and necrosis in the liver parenchyma. Based on polymerase chain reaction and transmission electron microscopy (TEM), we could identify the fowl adenoviruses as the causative agent of the disease. In the TEM, we observed the presence of a large number of intranuclear virus particles in the hepatocytes. We could also find the PCR amplification of 700 bp DNA from purified hydropericardium-hepatitis syndrome viral DNA.

• Korean Journal of Veterinary Service
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• v.31 no.4
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• pp.485-492
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• 2008

Salmonella enterica serovars Gallinarum(SG, causative agent of fowl typhoid) and S Pullorum(SP, causative agent of pullorum disease) are very important bacterial pathogens in poultry industry. They share some common antigenic properties though the characteristics of outbreaks are quite different. To discriminate between SG and SP, we developed two rapid diagnostic methods, allele-specific real-time PCR and 3'-tailed PCR over 2 single nucleotide polymorphisms ($237^{th}\;and\;598^{th}$). In both methods, $237^{th}$ allele was found to be a good target for differential diagnosis, while $598^{th}$ allele produced some non-specific reactions.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.11b
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• pp.755-761
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• 2002

Recently, the noise damage cases of livestock are increasing rapidly. The cases related to the livestock damage were occupied 20% of noise and vibration dispute intervention cases from 1991 to 2001. Of this results, 34% (16/38) are relative to pig, 27%(13/30) to domestic fowl and 20%(9/38) to cattle. The results of regression analysis of between the approval of damage rates (ADR) and a noise level by livestock have been derived that pigs was highly sensitive. In case of cattle, the regression model to apply the ADR according to the appraised noise level was made, but it needs to be complemented later.

• Journal of the korean veterinary medical association
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• v.8 no.6
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• pp.56-69
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• 1964

From these studies eighteen different experimental results were obtained and are summarized here. 1. The methodology of the modified complement fixation test for avian pox virus has been described. 2. The distribution and properties of CAM antigen resulte

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.11a
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• pp.375.1-375
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• 2002

Recently, the noise damage cases of livestock are increasing rapidly. The cases related to the livestock damage were occupied 20% of noise and vibration dispute intervention cases from 1991 to 2001. Of this results, 34%(16/38) are relative to Pig, 27%(13/38) to domestic fowl and 20%(9/38) to cattle. The results of regression analysis of between the approval of damage rates (ADR) and a noise level by livestock have been derived that pigs was highly sensitive. (omitted)