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Evaluation of the muscle fiber type and the muscle fat ratio of pork belly and pork shoulder butt
Hyunok Doo,Jinok Kwak,Sumin Ryu,Sheena Kim,Eun Sol Kim,Gi Beom Keum,Yejin Choi,Sriniwas Pandey,Na Rae Lee,Juyoun Kang,Jeongin Choi,Yujung Lee,Dongjun Kim,Kuk-Hwan Seol,Sun Moon Kang,In-Seon Bae,Soo-Hy 한국산업식품공학회 2023 학술대회 및 심포지엄 Vol.2023 No.11
Understanding the Diversity and Roles of the Ruminal Microbiome
Keum Gi Beom,Pandey Sriniwas,Kim Eun Sol,Doo Hyunok,Kwak Jinok,Ryu Sumin,Choi Yejin,Kang Juyoun,Kim Sheena,Kim Hyeun Bum 한국미생물학회 2024 The journal of microbiology Vol.62 No.3
The importance of ruminal microbiota in ruminants is emphasized, not only as a special symbiotic relationship with ruminants but also as an interactive and dynamic ecosystem established by the metabolites of various rumen microorganisms. Rumen microbial community is essential for life maintenance and production as they help decompose and utilize fiber that is difficult to digest, supplying about 70% of the energy needed by the host and 60–85% of the amino acids that reach the small intestine. Bacteria are the most abundant in the rumen, but protozoa, which are relatively large, account for 40–50% of the total microorganisms. However, the composition of these ruminal microbiota is not conserved or constant throughout life and is greatly influenced by the host. It is known that the initial colonization of calves immediately after birth is mainly influenced by the mother, and later changes depending on various factors such as diet, age, gender and breed. The initial rumen microbial community contains aerobic and facultative anaerobic bacteria due to the presence of oxygen, but as age increases, a hypoxic environment is created inside the rumen, and anaerobic bacteria become dominant in the rumen microbial community. As calves grow, taxonomic diversity increases, especially as they begin to consume solid food. Understanding the factors affecting the rumen microbial community and their effects and changes can lead to the early development and stabilization of the microbial community through the control of rumen microorganisms, and is expected to ultimately help improve host productivity and efficiency.
Hyunok Doo,Jin Ho Cho,송민호,Eun Sol Kim,김신아,Gi Beom Keum,Jinok Kwak,Sriniwas Pandey,류수민,Yejin Choi,강주연,김현범,Ju-Hoon Lee 한국축산학회 2024 한국축산학회지 Vol.66 No.2
The Enterococcus faecium (E. faecium) strain AK_C_05 was isolated from cheonggukjang, the Korean traditional food, collected from a local market in South Korea. In this report, we presented the complete genome sequence of E. faecium strain AK_C_05. The genome of E. faecium strain AK_C_05 genome consisted of one circular chromosome (2,691,319 bp) with a guanine + cytosine (GC) content of 38.3% and one circular plasmid (177,732 bp) with a GC content of 35.48%. The Annotation results revealed 2,827 protein-coding sequences (CDSs), 18 rRNAs, and 68 tRNA genes. It possesses genes, which encodes enzymes such as alpha-galactosidase (EC 3.2.1.22), beta-glucosidase (EC 3.2.1.21) and alpha-L-arabinofuranosidase (EC 3.2.1.55) enabling efficient utilization of carbohydrates. Based on Clusters of Orthologous Groups analysis, E. faecium strain AK_C_05 showed specialization in carbohydrate transport and metabolism indicating the ability to generate energy using a variety of carbohydrates.
Kim Hyeri,Kim Eun Sol,Cho Jin Ho,Song Minho,Cho Jae Hyoung,Kim Sheena,Keum Gi Beom,Kwak Jinok,Doo Hyunok,Pandey Sriniwas,Park Seung-Hwan,Lee Ju Huck,Hyunjung Jung,Hur Tai Young,Kim Jae-Kyung,Oh Kwang 한국미생물·생명공학회 2023 Journal of microbiology and biotechnology Vol.33 No.1
The foodborne illness is the important public health concerns, and the livestock feces are known to be one of the major reservoirs of foodborne pathogens. Also, it was reported that 45.5% of foodborne illness outbreaks have been associated with the animal products contaminated with the livestock feces. In addition, it has been known that the persistence of a pathogens depends on many potential virulent factors including the various virulent genes. Therefore, the first step to understanding the public health risk of livestock feces is to identify and describe microbial communities and potential virulent genes that contribute to bacterial pathogenicity. We used the whole metagenome shotgun sequencing to evaluate the prevalence of foodborne pathogens and to characterize the virulence associated genes in pig and chicken feces. Our data showed that the relative abundance of potential foodborne pathogens, such as Bacillus cereus was higher in chickens than pigs at the species level while the relative abundance of foodborne pathogens including Campylobacter coli was only detected in pigs. Also, the microbial functional characteristics of livestock feces revealed that the gene families related to “Biofilm formation and quorum sensing” were highly enriched in pigs than chicken. Moreover, the variety of gene families associated with “Resistance to antibiotics and toxic compounds” were detected in both animals. These results will help us to prepare the scientific action plans to improve awareness and understanding of the public health risks of livestock feces.