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Bacterial diversity and its relationship to growth performance of broilers
Bae, Yeonji,Koo, Bonsang,Lee, Seungbaek,Mo, Jongsuk,Oh, Kwanghyun,Mo, In Pil The Korean Society of Veterinary Science 2017 大韓獸醫學會誌 Vol.57 No.3
The microbial community is known to have a key role during the rearing period of broilers. In this study, gut microbial composition and diversity were examined to evaluate the relationships between these factors and broiler growth performance. By applying 454-pyrosequencing of the V1-V3 regions of bacterial 16S rRNA genes, six fecal samples from four- and 28-day-old chickens from three broiler farms and 24 intestinal samples of broilers with heavy and light body weights were analyzed. Microbial composition assessment revealed Firmicutes to be the most prevalent phylum at farm A, while Proteobacteria were predominant at farms B and C. Fecal microbial richness and diversity indices gradually increased from four to 28 days at all three farms. Microbial diversity assessment revealed that small intestine microbial diversity was lower in heavy birds than in light birds. In light birds, the Firmicutes proportion was lower than that in heavy birds. In conclusion, each broiler farm revealed a specific microbial profile which varied with the age of the birds. The microbial communities appeared to affect growth performance; therefore, gut microbial profiles can be utilized to monitor growth performance at broiler farms.
Kang, Sohi,Yang, Wonjun,Oh, Hanseul,Bae, Yeonji,Ahn, Meejung,Kang, Min Chul,Ko, Ryeo Kyeong,Kim, Gi Ok,Lee, Jun Hwa,Hyun, Jin Won,Moon, Changjong,Shin, Taekyun The Korean Society of Veterinary Science 2011 大韓獸醫學會誌 Vol.51 No.4
Several compounds and extracts isolated from a brown alga, Ishige (I.) okamurae, exhibit anti-oxidant and anti-inflammatory effects. The present study investigated whether the ethyl acetate (EtOAc) fraction of I. okamurae (EFIO) could ameliorate carbon tetrachloride ($CCl_{4}$)-induced hepatotoxicity in rats. Sprague-Dawley rats were intraperitoneally (i.p.) administered with EFIO at 10 or 50 mg/kg per day for 2 consecutive days before $CCl_{4}$ injection (3.3 mL/kg, i.p.). Twenty four hours later, the rats were anesthesized with diethyl ether and dissected. Pretreatment with EFIO significantly reduced the increased serum levels of alanine aminotransferase and aspartate aminotransferase in $CCl_{4}$-treated rats. Pretreatment with EFIO also significantly inhibited the reduced activities of superoxide dismutase and catalase in the $CCl_{4}$-injured liver. Histopathological evaluations showed that hemorrhage, hepatocyte necrosis, inflammatory cell infiltration, and fatty degeneration induced by $CCl_{4}$ treatment were ameliorated by the administration of EFIO. Additionally, liver immunohistochemical analyses revealed the marked reduction in ED1-positive monocyte-like macrophages in EFIO-pretreated rats given $CCl_{4}$. These results suggest that EFIO ameliorates $CCl_{4}$-induced liver injury, possibly through the inhibition of oxidative stress.
박창남,양원준,배연지,이용덕,강완철,안미정,신태균,Park, Changnam,Yang, Wonjun,Bae, Yeonji,Lee, Yongduk,Kang, Wanchoul,Ahn, Meejung,Shin, Taekyun 대한수의학회 2013 大韓獸醫學會誌 Vol.53 No.1
The vomeronasal organ (VNO) plays an important role in reproduction and social activities in ruminants including goats. A morphological study on the structure of VNO and its epithelial cells was carried out in Korean black goats. Grossly, the VNO of Korean goats opens into mouth through incisive ducts. Microscopically, the epithelium of VNO consisted of medial sensory epithelium and lateral non-sensory epithelium. Several blood vessels and nerve bundles were observed in the lamina propria encased by vomeronasal cartilage. Immunohistochemical staining showed that protein gene product (PGP) 9.5 was immunostained in the receptor cells of the sensory epithelium and in some cells of the non-sensory epithelium. Galectin-3 was mainly observed in the supporting cells of sensory and non-sensory epithelium. Lectins including wheat germ agglutinin, Ulex europaeus agglutinin, Bandeiraea simplicifolia lectin Isolectin B4, Dolichos biflorus agglutinin and soybean agglutinin used in this study were bound in VNO sensory, non-sensory epithelia as well as in the lamina propria with varying intensity. Collectively, this is a first descriptive morphological study of VNO of Korean black goat with special reference to lectin histochemistry.
RAFT/PISA based Ni-NTA polymeric particles for virus-mimetic influenza vaccines
Chaeyeon Lee,Aran Hwang,Leeja Jose,JiHyunPark,Sunah Jang,Jae Kwang Song,Yeonji Kim,Yungyeong Cho,Heung Bae Jeon,Jun-O Jin,백현종 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.86 No.-
Resource and time consuming difficult procedures involving the preparation of antigen surfacefunctionalized nanoparticles mimicking viruses for optimum immunogenicity have been the challengesfor their actual application. In this context, we developed stable polymeric particles functionalized withNi2+-NTA via the combination of RAFT emulsion polymerization and polymerization-induced selfassembly(RAFT-PISA), and mixed with recombinant H1 tagged with hexa-histidine (His6-H1) for one dayto prepare the influenza-mimetic polymeric particles. The RAFT-PISA based polymer particles exhibitedgood structural stability while the Ni2+-NTA-functionality provided a perfect docking site for thecontrolled orientation of His6-H1. The His6-H1 protein immobilization with Ni2+-NTA of the particle wasstudied with time. In addition, we investigated the immune response of the synthesized vaccine againstinfluenza with varying the mixing time. We expect our system would open new avenues for preparationof influenza-mimetic vaccines like by mixing of a ready-made surface-functionalized particle andrecombinant hemagglutinin.
hae sun jang,Hae-Rim Lee,구본상,Eun-Ok Jeon,Moo-Sung Han,Kyung-Cheol Min,Seung-Baek Lee,Yeonji-Bae,Sun-Hyung Cho,Jong-Suk Mo,Jong-Nyeo Kim,모인필 한국가금학회 2014 韓國家禽學會誌 Vol.41 No.3
While use of mass rearing systems improved poultry production, chances of exposing to contagious diseases have been increased, making flocks more vulnerable to diseases. Diseases of interest which affects egg production adversely include Low pathogenic avian influenza (LPAI), Infectious bronchitis (IB), Avian meta-pneumoviral infection (aMPV) and Egg drop syndrome’76 (EDS’76). This report collected and analyzed 5,385 serum samples, which were collected from 1,330 different chicken flock, provided by Chungbuk National University, Avian Disease Laboratory at 2009. Serums were analyzed based on rearing stages; 0∼1.3weeks (wks) (maternal antibody period), >1.3∼3 wks (starting period), >3∼10 wks (growing period), >10∼22 wks (developing period), >22∼40 wks (peak laying period), >40∼60 wks (late laying period) and over 60 wks (post-molting period). Results showed the 99.7% of the tested flocks were immunized against ND and73.8%, 97.1%, 78,2% and 78% of the flocks were immunized against other 4 agents (LPAI, IB, EDS’76, aMPV). Maternal antibody was transferred to enough quantity for NDV. Generally, antibody titers which were developed at 22 weeks were stabilized permanently for life. In case of IB and aMPV, infection titer emerged as early as 10 weeks and the titer was increased from 99.4% to 100% for life. EDS76 showed increase in titers, reflecting decreased frequency of vaccination programs. Overall, this study displayed general trends of major viral disease in layers, but considering the trend of development of preventive measures and evolution of pathogens, conducting serological surveys on a regular basis is important.
Necrotic enteritis in a captive mute swan (Cygnus olor) in the breeding season
Lee, Hae Rim,Koo, Bon-Sang,Jeon, Eun-Ok,Han, Moo-Sung,Min, Kyung-Cheol,Lee, Seung Baek,Bae, Yeonji,Kim, Jung-Ho,Mo, In-Pil The Korean Society of Veterinary Service 2014 韓國家畜衛生學會誌 Vol.37 No.2
A captive mute swan (Cygnus olor) in the brooding period was found dead without any specific signs. On necropsy, the entire digestive tract was severely necrotized with loosely adherent pseudomembranes, and Clostridium perfringens (CP) colonies isolated from the intestinal contents were identified as CP type A by polymerase chain reaction. Microscopically, the intestine and the liver were necrotized and intralesional bacterial clusters were observed. In this case, there were no other mortalities, so the condition of a single bird, in particular, stress from incubation effort, could act as the predisposing factor for necrotic enteritis. In this study, we report a unique case of necrotic enteritis associated with incubation in a captive mute swan.
Epidemiological Studies of Avian Paramyxovirus Type 4 and 6 in Commercial Chicken Flocks in Korea
Lee, Hae Rim,Koo, Bon-Sang,Jeon, Eun-Ok,Han, Moo-Sung,Min, Kyung-Cheol,Lee, Seung Baek,Bae, Yeonji,Choi, Kang-Seuk,Shin, Jeong-Hwa,Mo, In-Pil The Korean Society of Poultry Science 2013 韓國家禽學會誌 Vol.40 No.4
Avian paramyxovirus (APMV) type 4 and 6 were isolated during an avian influenza (AI) surveillance program of wild birds. This study also conducted experimental infection of wild-bird-origin APMV type 4 and 6 in specific pathogen free (SPF) chickens to study pathogenicity and transmission within domestic flocks. In addition, serological prevalence data of APMV type 4 and 6 in domestic fowls was conducted with chicken sera collected from 2007 to 2009 in order to understand infection status. The results of the animal experiment showed that APMV type 4 and 6 had the ability to infect chickens with sero-conversion and to transmit the virus from infected birds to contacted birds, but showed low pathogenicity. Serological tests revealed that APMV type 4 was widespread in the poultry industry, especially in layer flocks, but the positive rate for APMV type 6 was very low. This study concluded that wild bird-origin APMV type 4 and 6 could infect the chickens by inter-species transmission and the seroprevalence of APMV type 4 was quite high in Korean poultry. However, since almost all the chicken flocks had a high level of antibody titer against APMV type 1, there was possibility of cross reaction between APMV type 1 and 4, which made the interpretations more complicated. In order to understand infection status in the natural environment, additional study is necessary regarding the seroprevalence of APMV type 4 and 6 in the wild bird population.