• Korean Journal of Poultry Science
• /
• v.22 no.3
• /
• pp.167-178
• /
• 1995

The purpose of this research was to get basic information for the development of Korean native chicken industry by reviewing the current native chicken farm management and marketing situation of native chicken products(meat and eggs). The research was carried on the basis of the farm field survey covering 210 native chicken feeders out of 9 different local areas, and the results were as follows ; 1. Average raising size of native chicken flocks of sample farms was 1,787 heads and about 50% of those farms raised less than 500 heads chickens for self-sufficiency or on the side. 2. Most farmers made the decision to start on feeding native chickens in small scale with small amount of capital without sound feeding program, and their decision was mainly influenced by recommendation of mass-media( 19.5%) and neighbors (17.2%). 3. The average income per farm earned by raising the native chickens was 13,719 Won, and income per head of chicken was 8,800 Won. 4. About 40% of feeders expressed that the poor marketing management and lack of capital were the bottleneck to native chicken farm management. 5. About 70% of feeders evaluated the prospect of native chicken industry positively and so, about 60% of feeders hoped to expand the raising size in the future. 6. Most farmers directry made a bargain with marketer including middleman and enduser in selling the chicken products because there was not established special marketing system for native chicken products. 7. The sales age of native broiler was about 16~20 weeks and average body weight of broiler was 1.5~2.0 kg. And farm recieved price was not decided on the basis of each body weight or meat quality but only number of heads. 8. The average first egg-laying age of chickens was about 165 days and average annual laying rate was only about 56%. 9. In order to develop the successful Korean native chicken industry, followings are recommended ; 1) Reducing the production costs and increasing the productivity of native chickens should be carried out through technological research and development for sound feeding program of native chickens and sufficient fund supply. 2) Orderly native chicken marketing and pricing system should be established to give good vision about native chickens to farmers and to delight the consumers. 3) The measures for product differentiation including meat quality and nutritional value of native chicken products against other improved chickens should be actively taken by feeders and government.

• Journal of the Korean Society of Safety
• /
• v.22 no.4
• /
• pp.90-95
• /
• 2007

The objective of this study was to find the musculoskeletal stress problems at chicken farms in Korea. One typical chicken farm was surveyed in this study. NLE(NIOSH Lifting Equation), REBA(Rapid Entire Body Assessment), and OWAS(Ovako Working Analysis System) were used to evaluate the extent of the musculoskeletal stress. It was found that there were some tasks which required fast innovation. It was also found that the RWL (Recommended Weight of Lift) was 4.6Kg. that was lower than weights which were handled by these workers.

• Proceedings of the Korea Society of Poultry Science Conference
• /
• 2001.11a
• /
• pp.107-109
• /
• 2001

Survey questionnaires were collected from broiler farmers and analysed in this study to find out ways to respond to the open international chicken trades-chicken marketing plan and market price control. Broiler farm production and management were analyzed and it was found that number of chicken produced per farm was related to systematic and strategic level of farming such as chicken housing, technical problems, and cost of production.

• Asian-Australasian Journal of Animal Sciences
• /
• v.26 no.2
• /
• pp.157-162
• /
• 2013

The use of Korean native chicken is increasing, and the discovery of new genetic resources is very important from both economic and genetic conservation points of view. In this study, mtDNA D-loop sequences from 272 privately-owned Korean native chickens from a Hyunin farm were investigated. Seventeen nucleotide substitutions were identified from the sequence analysis and they were classified as 6 haplotypes. Previously investigated haplotypes in five Korean native chicken populations have been compared with the Hyunin chicken population. The results indicated that two haplotypes, H10 and H15, in the Hyunin chicken population were not previously identified in other Korean native chicken populations, representing 33.09% (90/272) and 1.1% (3/272) of the Hyunin population, respectively. On the other hand, four other haplotypes were identical to those of a previous study of Korean native chicken populations. This result is indicative of conservation strategies of Hyunin chicken populations for expanding the genetic diversity in the Korean native chicken population.

• Monthly Korean Chicken
• /
• v.50 no.44 s.110
• /
• pp.56-61
• /
• 2004

• Journal of Animal Science and Technology
• /
• v.57 no.11
• /
• pp.40.1-40.7
• /
• 2015

Background: Activation of peroxisome proliferator activated receptor gamma ($PPAR{\gamma}$) in the alveolar macrophages (AM) by selective synthetic $PPAR{\gamma}$ ligands, improves the ability of the cells to resolve inflammation. In birds, respiratory macrophages are known as free avian respiratory macrophages (FARM) and show distinct functional differences from AM. The effects of treating FARM with $PPAR{\gamma}$ ligands are unclear. Methods: FARM were harvested by lavage of chicken respiratory tract and their morphology assessed at microscopic level. The effects of $PPAR{\gamma}$ agonists on the FARM in vitro viability, phagocytic capacity and proinflammatory cytokine (TNF-${\alpha}$) production were assessed. Results: FARM had eccentric nucleus and plasma membrane ruffled with filopodial extensions. Ultrastructurally, numerous vesicular bodies presumed to be lysosomes were present. FARM treated with troglitazone, a selective $PPAR{\gamma}$ agonist, had similar in vitro viability with untreated FARM. However, treated FARM co-cultured with polystyrene particles, internalized more particles with a mean volume density of 41 % compared to that of untreated FARM of 21 %. Further, treated FARM significantly decreased LPS-induced TNF-${\alpha}$ production in a dose dependent manner. Conclusion: Results from this study show that $PPAR{\gamma}$ synthetic ligands enhance phagocytic ability of FARM. Further the ligands attenuate production of proinflammatory cytokines in the FARM, suggesting potential therapeutic application of $PPAR{\gamma}$ ligands in the management of respiratory inflammatory disorders in the poultry industry.

• Journal of the Korean Applied Science and Technology
• /
• v.33 no.4
• /
• pp.813-823
• /
• 2016

The purpose of this study was to investigate the effects of ionized calcium treatment on total bacterial cross-contamination of chicken carcass surface in the slaughtering process. The growth of Escherichia coli was strongly inhibited in a medium prepared by using a 0.5% ionized calcium solution. The total bacterial cross-contamination of chicken carcass surface and the scalding water was significantly increased as the number of scalding was increased (p<0.05). The total bacterial cross-contamination of chicken carcass surface reached a plateau without a further increase as scalding was performed consecutively for 10 or more times. The total bacterial cross-contamination of the scalding water was significantly increased as the number of scalding was increased (p<0.05). The total bacterial cross-contamination of chicken carcass surface of the chickens raised on a floor type farm was significantly higher than that of the chickens raised in a battery cages (p<0.05). The total bacterial cross-contamination of chicken carcass surface of the chickens raised on a floor type farm was significantly lower in the 0.5% ionized calcium solution treatment group than in the control group (p<0.05).

• Journal of Microbiology and Biotechnology
• /
• v.26 no.9
• /
• pp.1551-1556
• /
• 2016

Broiler meat production worldwide has been plagued by lethal food-poisoning bacteria diseases, including listeriosis. A fatality rate of 15.6% was recorded in human beings in the EU in 2015. During 2013, a total of 200 poultry farm samples, including litter, chicken breast, farm feed, and drinking water, were collected to generate baseline data for the characterization of the genus Listeria in broiler poultry farms. Listeria spp. were detected in a total of 95 (47.5%) poultry farm samples. The isolates of Listeria spp. included L. innocua (28.5%), L. ivanovii (12.5%), L. welshimeri (4.5%), and L. monocytogenes and L. seeligeri (1% each). Listeria spp. contamination rates were higher in farm feed (70%), followed by litter (52.5%), chicken breasts (42.2%), and drinking water (10%). Almost all Listeria spp. isolates were resistant to more than three classes of antibiotics (multidrug resistant). Besides this, we observed a significant resistance level to penicillin and fluoroquinolone drugs. However, lower resistance levels were recorded for broad-spectrum cephalosporins. The inlA, inlC, and inlJ virulence genes were detected in almost all of the L. monocytogenes isolates. Thus, food safety management approaches and interventions at all stages of the broiler rearing cycle were needed to control cross-contamination and the zoonotic potential of listeriosis.

• Korean Journal of Veterinary Research
• /
• v.57 no.2
• /
• pp.117-126
• /
• 2017

Bovine mastitis is an important microbial disease in the dairy industry. We investigated the frequencies of bacterial pathogens in 62 farms and pathogen antibiotic resistance from mastitis samples (n = 748). We tested the antimicrobial activity of chicken and duck egg white and lysozyme purified from chicken egg white. Moreover, we compared the microbiomes of normal and mastitic raw milk obtained by 16S rRNA gene pyrosequencing and culture methods. The results showed that the frequencies of Gram-positive pathogens (Enterococcus faecalis 37% and Staphylococcus aureus 36%) were higher than that of a Gram-negative pathogen (Escherichia coli 15%). Resistance frequencies to ampicillin and norfloxacin were lowest in Staphylococcus aureus (21%), Enterococcus faecalis (23%), and Escherichia coli (33%), and the antimicrobial activity of chicken egg white was higher than those of lysozyme and duck egg white. Pyrosequencing results revealed clear differences between the microbiomes of mastitic and normal raw milk samples and revealed a slightly similar, but clearly different, composition of pathogens compared to that from the culture method. Thus, pyrosequencing may be useful for elucidating changes in microbiomes during mastitis progression and treatment. A chicken egg white and antibiotic combination may help with mastitis treatment; however, further studies are needed.

• Korean Journal of Veterinary Service
• /
• v.17 no.1
• /
• pp.44-53
• /
• 1994

The result that investigated aberage weekly oocyst nymbers in faeces from 16 broiler farms, Oocyst can be found in the highest during the 5 weeks age. The 3 of the 16 farms have clinical sign of the coccidiosis at the faeces collection. Anticoccidial drug sensitivity against Oocyst isolated in 2 farms to have clinical coccidiosis was tested for the drug susceptibility and resistance in order to prevention coccidiosis effectively. Maduramicin, Salynomicif Narasin Lasalocid, Monensin, Robenidine and Dicrazulir were used an anticoccidial drugs. The results ; Anticoccidial index(ACI) of the A farm were 201.50 in a chicken group treated with Dicrazulir, 194.84 with Robenidine. 172.79 with Maduramicin 6ppm 170.49 with Salynomicin, 168.02 with maduramicin 5ppm 165.77 with Lasalocid, 143.34 with Monensin and 140.63 with Narasin. ACI of the B farm were 193.40 in a chicken group treated Robenidine, 190.64 with Dicrazuril, 158.75 with Maduramic in 6ppm, 151.62 with Maduramicin 5ppm, 149.44 with Salynomicin, 143.10 with lasalocid, 138.11 with Monensin and 137.50 with Narasin. According to interpretation of ACI from Kawasae et al, the drug resistance(less than 120 of ACI) not appeared in two farms, vut the drug tolerance(120-160 of ACI) appeared in two group treated with Monesin and Nalacin in csae of A farm and in all group with treated anticoccidial drug in case of B farm.