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Evaluation of Recombinant Human Lactoferricin Culture as a Substitute for Antibiotic in Pig Starter Diets

이유자돈사료에 항생제를 대체하기 위한 재조합 인간 락토페리신 컬처의 평가

  • Hong, J.W. (Department of Animal Resource & Sciences, Dankook University) ;
  • Kim, I.H. (Department of Animal Resource & Sciences, Dankook University) ;
  • Hwang, I.H. (Easy-Bio System, Inc.) ;
  • Lee, J.H. (Easy-Bio System, Inc.) ;
  • Kim, J.H. (Agribrands Purina Korea, Inc.) ;
  • Kwon, O.S. ;
  • Lee, S.H. (Department of Animal Resource & Sciences, Dankook University)
  • 홍종욱 (단국대학교 동물자원과학과) ;
  • 김인호 (단국대학교 동물자원과학과) ;
  • 황일환 ((주)이지바이오시스템) ;
  • 이지훈 ((주)이지바이오시스템) ;
  • 김지훈 ((주)애그리브랜드 퓨리나 코리아) ;
  • 권오석 (단국대학교 동물자원과학과) ;
  • 이상환 (단국대학교 동물자원과학과)
  • Published : 2003.08.30

Abstract

Sixty [(Duroc${\times}$Yorkshire)${\times}$Landrace] pigs (7.63$\pm$0.41kg average body weight and 25-d average age) were used in a 20-d growth assay to determine the effect of dietary recombinant human lactoferricin culture (RHLC) supplementation on growth performance, digestibility and plasma IgG concentration in weaning pigs. Dietary treatments included 1) Negative control (NC : without antibiotic), 2) Positive control (PC : NC diet + 0.1% chlortetracycline), 3) RHLC0.3 (NC diet + 0.3% RHLC), 4) RHLC0.5 (NC diet + 0.5% RHLC). No differences were found among treatments in average daily gain (P>0.05). ADFI of pigs fed RHLC0.3 diet was higher than that of pigs fed PC diet (P<0.05). However, pigs fed RHLC0.5 diet had improved gain/feed compared to pigs fed PC diet. Pigs fed PC and RHLC diets showed significantly increased dry matter digestibility compared to pigs fed NC diet (P<0.05). There was no significant difference in plasma IgG concentrations (P>0.05). The supplementation of RHLC in starter pig diets appears to be an alternative to antibiotics.

개시시 체중 7.63, 0.41kg, 3원 교잡종 이유자돈(25일령) 60두를 공시하여, 이유자돈 사료내 재조합 인간 락토페리신 컬처(RHLC ; recombinant human lactoferricin culture)의 급여가 성장, 영양소 소화율 및 혈장내 면역글로블린 G 농도에 미치는 영향을 평가하기 위하여 20일간 사양시험을 실시하였다. 시험설계는 1) 항생제 무첨가구(NC), 2) 항생제 첨가구(PC; NC 사료 + 0.1% chlortetracycline), 3) 항생제 무첨가구 사료에 RHLC를 0.3% 첨가한 처리구 (RHLC0.3; NC 사료 + 0.3% RHLC), 4) 항생제 무첨가구 사료에 RHLC를 0.5% 첨가한 처리구 (RHLC0.5; NC 사료 + 0.5% RHLC)로 4개 처리로 하였다. 총 사양시험 기간동안, 일당증체량에 있어서는 항생제 첨가구와 비교하여 RHLC의 첨가수준이 증가함에 따라 높아지는 경향을 보였으나, 표준오차가 크기 때문에 유의적인 차이는 보이지 않았다. 일당사료섭취량에 있어서는 PC 처리구와 비교하여 RHLC0.3 처리구가 유의적으로 높았으며(P<0.05), 사료효율에 있어서는 PC 처리구와 비교하여 RHLC0.5 처리구가 가장 좋은 것으로 나타났다(P<0.05). 영양소 소화율에 있어서는 NC 처리구와 비교하여 PC, RHLC0.3 및 RHLC0.5 처리구가 유의적으로 높게 평가되었으며(P<0.05), 혈장내 면역글로블린 G 농도는 처리구간에 유의적인 차이를 보이지 않았다. 결론적으로, 이유자돈에 있어 재조합 인간 락토페린신 컬처가 항생제를 대체할 가능성이 있는 것으로 사료된다.

Keywords

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