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Human Milk Antibacterial Factors

The Effect of Temperature on Defense Systems
  • Hann-Yi Chen
  • Jonathan C. Allen
Chapter
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 501)

Abstract

Bovine milk will eventually spoil at refrigeration temperatures, but endogenous or exogenous pathogenic or spoilage bacteria in human milk stored for delayed feeding will die. We investigated the mechanism for these antibacterial properties and their response to high-tempertature, short-time (HTST, 72°C-75°C, 15 sec) and low-temperature long-time (LTLT, 65°C, 30min) pasteurization. NonpathogenicListeria innocua(106cfu/mL) was inoculated into raw and processed bovine and human milk; bacterial plate counts twice weekly determined antibacterial activities. Up to 99% ofL. innocuawere killed and further growth was inhibited in raw and pasteurized human milk for at least 60 days at 4°C. Reactive IgA antibodies againstListeriaantigens were demonstrated by enzyme immunoassay in some human milk samples; sIgA activity againstEscherichia coliO antigens was significantly decreased by heat treatments (raw, 1.8; HTST, 1.1; LTLT, 1.3 activity units). Adding human lactoferrin (0.5-20 mg/mL) to theListeriainoculum (-107cfu/mL) in 1% peptone water did not inhibit bacterial growth.

Keywords

Milk Sample Human Milk Bovine Milk Peptone Water Refrigeration Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • Hann-Yi Chen
    • 1
  • Jonathan C. Allen
    • 1
  1. 1.Interdepartmental Nutrition ProgramDepartment of Food Science North Carolina State University Raleigh

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