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산란계에서 Chlorhexidine-inactivated Salmonella Enteritidis, S. Typhimurium 및 S. Gallinarum 3가 백신의 효능평가
유영주 ( Yeong Ju Yu ),유정희 ( Jeong Hee Yu ),허진 ( Jin Hur ) 한국동물위생학회 2023 한국동물위생학회지 (KOJVS) Vol.46 No.4
Protective efficacy of trivalent Salmonella inactivated vaccine containing Chlorhexidine-inactivated S. Enterltidis (SE), S. Typhimurium (ST), and S. Gallinarum (SG) strains, was evaluated in this study. A total of 70 brown nick layers were divided into 7 groups, A to G, containing 10 hens per group. All hens in groups B to D were intramuscularly immunized with approximately 7×10<sup>8</sup> cells (3×10<sup>8</sup> cells of SE+1×10<sup>8</sup> cells of ST+3×10<sup>8</sup> cells of SG) of the trivalent vaccine in 0.5 mL of PBS. All chickens in groups E to G were injected with sterile PBS. All hens of groups B and E, groups C and F, and groups D and G were orally challenged with approximately 2 ×10<sup>9</sup> CFU of wild-type SE, ST, and SG, respectively. Serum IgG titers and CD3<sup>+</sup>CD4<sup>+</sup> T-cells, and CD3<sup>+</sup>CD8<sup>+</sup> T-cells levels of groups B to D significantly higher than those of group A. In addition, all animals in groups A to C, E and F showed no clinical symptoms and survived after the virulent challenges, whereas one chicken in group D died and all chickens in group G died following the challenge. The protection against wild-type SE and ST in liver, spleen, cecum, and cloaca of groups B and C chickens was significant effective as compared with those in groups E and F. These indicate that the trivalent inactivated vaccine can be an effective tool for prevention of Salmonella infections by inducing robustly protective immune responses and cellular immune response in chickens.
재조합 lysozyme-HJP34 단백질의 다양한 병원성 세균에 대한 항 균 효능 및 자돈 사료첨가제의 가능성 평가
유정희 ( Jeong-hee Yu ),유영주 ( Yeong-ju Yu ),김선민 ( Seon-min Kim ),허진 ( Jin Hur ) 한국동물위생학회 2021 한국동물위생학회지 (KOJVS) Vol.44 No.4
The recombinant lysozyme-HJL34 proteins were expressed and purified using commercial Escherichia (E.) coli expression system. Stx2e<sup>+</sup> F18<sup>+</sup> E. coli, Actinobacillus pleuropneumoniae (APP), Streptococcus (S.) suis, and Clostridium (C.) perfringens strains were isolated from pigs. The minimum inhibitory concentrations (MICs) of the recombinant lysozyme-HJP34 proteins were examined by means of the microtiter plate method, according to the NCCLS recommendations. The possibility of its as the alternatives to antibiotics was tested in piglets. The MICs were determined as 75 μg/mL, 300 μg/mL, 75 μg/mL, 35.5 μg/m against Stx2e<sup>+</sup> F18<sup>+</sup> E. coli, APP, S. suis, C. perfringens, respectively. A total of 25 piglets were divied 5 groups. The piglets in group A∼C were fed with commercial feed and those in groups D, E were fed with commercial feedstuff. All piglets in groups B∼E were challenged with virulent Stx2e<sup>+</sup> F18<sup>+</sup> E. coli, APP, S. suis strains. Groups C and D were treated with antimicrobial from 24 h after challenge. All piglets in group B died within 3 days after challenge. Among 5 piglets in groups C and D piglets, 80% survived after challenge. Among group E piglets, 60% were alive until the end of this study. Therefore, this study indicates that recombinant lysozyme-HJP34 proteins is a suitable possibility as a feed additive for reduction of diseases by bacterial pathogens in piglet feed.
한국 도시부부의 부부싸움 및 부부싸움 대처행동이 결혼만족도에 미치는 영향 -수도권 거주 기혼 남성과 여성을 중심으로-
강학중 ( Kang Hag Jung ),유영주 ( Yu Yeong Ju ) 한국가족관계학회 2003 한국가족관계학회지 Vol.8 No.2
The purpose of this study is to find out the influence of marital fight and fightcoping behavior on the marital satisfaction between married men and women. Total of 375 married men and women, who are living in Seoul Metropolitan area, answered structured questionnaires. Major study results were as follows: 1. The difference of marital fight between married men and women among the eight subscales was not shown significant. However, the difference of perception of marital fight between married men and women was shown significant in items such as `we fight because of manner of speaking that makes the other feel bad` and `we fight against preconception that married women have to be in charge of housework`. 2. The difference of marital fightcoping behavior between married men and women among the three subscales was not shown significant. However, the difference of perception of marital fightcoping behavior between married men and women was shown significant in items such as `I spoke harshy that hurt my partner` and `I threatened to hit or throw something at my partner`. 3. The influential variables on the marital satisfaction between married men and women were chosen out of sociodemographic variables, marital fight, and fightcoping behavior. It turned out that, as for married men, only three variables of household budget management, emotional negotiation and cognitive negotiation had influence on the degree of marital satisfaction. However, married women`s marital satisfaction was influenced by seven variables: education level, marriage type, personality difference, communicational problems, household budget management, emotional negotiation and cognitive negotiation.
전북지역 양돈장에서의 돼지 부종병 항체 및 톡신 양성률 조사
조선영 ( Sun-young Cho ),유정희 ( Jeong Hee Yu ),유영주 ( Yeong Ju Yu ),이한준 ( Han-jun Lee ),허진 ( Jin Hur ) 한국동물위생학회 2023 한국동물위생학회지 (KOJVS) Vol.46 No.4
Edema disease (ED) in pigs is enterotoxemia caused by Shiga toxin type 2e (Stx2e)-producing Escherichia coli (STEC) and frequently occurs in young piglets. Therefore, ED causes enormous economic losses in pig farms. In this study, a modified Stx2e (mStx2e) antigen was expressed and purified using commercial E. coli expression system. Monoclonal antibody was serviced by Ynto Ab Inc., using Phage Display Technique. Anti-Stx2e antibodies in piglets were measured by indirect ELISA using mStx2e antigens. Naive Stx2e in piglets were detected by Sandwich ELISA using Stx2e-monoclonal antibodies and commercial Stx2e-polyclonal antibodies. Among 3,480 piglets, anti-Stx2e antibodies were observed in 2,573 piglets. The 49.4% among 830 piglet serum samples possessed 0.625 mg/mL or more of Stx2e proteins. The 18.3% of 830 sera had 0.313 mg/mL of Stx2e proteins. The 32.3% of 830 samples held 0.156 mg/mL or less of Stx2e proteins. These results show that indirect ELISA using mStx2e antigen and Sandwich ELISA using Stx2e-monoclonal and polyclonal antibodies can be useful to detect ED in piglets.