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Holstein 초유 중 Lactoferrin, IgA, IgG1, IgG2 정량과 미생물의 성장에 미치는 영향

Measurement of Lactoferrin, IgA, IgG1, IgG2, Antibacterial Activity, and Lactic Acid Bacterial Growth in Holstein Colostrum

  • 랜친핸드 (충남대학교 농업생명과학대학 동물자원과학부) ;
  • 배형철 (충남대학교 농업생명과학대학 동물자원과학부) ;
  • 남명수 (충남대학교 농업생명과학대학 동물자원과학부)
  • 발행 : 2007.12.30

초록

본 실험은 홀스타인 젖소의 초유에 함유된 lactoferrin, IgA, $IgG_1,\;IgG_2$의 함량과 병원성미생물의 항균효과, 유산균증식효과를 알아보기 위하여 수행하였다. 홀스타인종 젖소 초유의 lactoferrin, IgA, $IgG_1,\;IgG_2$의 함량은 여름철의 경우 분만 후 첫째 날에 각각 0.30 mg/mL, 0.37 mg/mL, 4.00 mg/mL, 0.37 mg/mL, 겨울철의 경우 분만 후 첫째 날에 각각 1.16 mg/mL, 2.60 mg/mL, 13.35 mg/mL, 1.30 mg/mL로 측정되었다. 무열처리한 초유와 $65^{\circ}C$에서 30분간 열처리한 초유에서 배양한 병원성 미생물의 변화는 E. coli 균주에 대하여 초유의 항균활성이 나타났다. 초유 첫째 날, 둘째 날, 세째 날의 유산균수 성장촉진 효과는 B. longum, L. acidophilus S. themophilus의 상업용 혼합균주와 L. acidophilus, L. casei, L. bulgaricus, L. lactis subsp. cremoris에서 모두 정상유보다 균수가 증가하였다. 초유 첫째 날, 둘째 날, 세째 날의 pH는 배양 15시간 후 B. longum, L. acidophilus S. themophilus의 상업용 혼합균주와 L. acidophilus, L. casei, L. bulgaricus, L. lactis subsp. cremoris에서 각각 4.97-5.22 및 5.96-6.47로 나타났으나, 정상유에서는 각각 4.89, 6.50-6.81이었다. 초유 첫째 날, 둘째 날, 세째 날의 산도는 B. longum, L. acidophilus S. themophilus의 상업용 혼합균주와 L. acidophilus, L. casei, L. bulgaricus, L. lactis subsp. cremoris에서 각각 0.75-0.88% 및 0.29-0.48%로 나타났으나, 정상유에서는 각각 0.70%, 0.20-0.25% 이었다.

This experiment was carried out to measure the content of lactoferrin, IgA, $IgG_1,\;IgG_2$, in Holstein colostrum, and to test the effect of it's colostrum on the antibacterial activity to pathogenic bacteria and the growth stimulation of lactic acid bacteria. Colostrum was collected at the first, second, and third day after parturition in summer and winter season. The levels of lactoferrin, IgA, $IgG_1,\;and\;IgG_2$ in Holstein cow colostrum were 0.30 mg/mL, 0.37 mg/mL, 4.00 mg/mL, 0.37 mg/mL, respectively, on the first day of the summer season whereas they were 1.16 mg/mL, 2.60 mg/mL, 13.35 mg/mL, 1.30 mg/mL on the first day of the winter season, postpartum. Heat treated ($65^{\circ}C$ for 30 min) or non-treated colostrum showed antibacterial activity toward Escherichia coli. The growth of commercial mixed strains (Bifidobacterium longum, Lactobacillus acidophilus, Streptococcus themophilus), L. acidophilus, L. casei, L. bulgaricus, and L. lactis subsp. cremoris were improved in first, second and third day colostrum compared to normal milk. Commercial miked strains (B. longum, L. acidophilus S. themophilus) lowered the pH to 4.97-5.22 and 4.89 while increasing the titratable acidity to 0.75-0.88% and 0.70% in colostrum and normal milk, respectively. However, L. casei, L. bulgaricus, L. lactis subsp. cremoris lowered the pH to 5.96-6.47 and 6.5-6.8 while increasing the titratable acidity to 0.29-0.48% and 0.20-0.25% in colostrum and normal milk, respectively.

키워드

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