Article
Bacterial contaminants of collected and frozen human milk used in an intensive care nursery

https://doi.org/10.1016/0196-6553(93)90413-XGet rights and content

Abstract

Background: Use of human milk for preterm and high-risk neonates conveys many potential benefits but also poses practical difficulties. This prospective study examined the prevalence and degree of bacterial contamination of human milk used in the intensive care nursery.

Methods: One hundred eight milk samples collected from 40 mothers were tested for contamination. Samples from mothers whose milk showed a high degree of contamination were retested after counseling on collection methods.

Results: Only 12.5% of the samples showed no bacterial growth. Of the contaminated samples, 38% contained > 30,000 colony-forming units/ml. The most common contaminants were Staphylococcus epidermidis (82%) and Acinetobacter (9%), but other contaminants were also encountered.

Conclusions: There were not statistically identifiable common characteristics of mothers whose milk showed abundant bacterial contamination. Only 30% of these mothers showed improvement in the degree of contamination after counseling regarding techniques of milk collection.

References (34)

  • P.A. West et al.

    The influence of methods of collection and storage on the bacteriology of human milk

    J Appl Bacteriol

    (1979)
  • R. Sauve et al.

    Mother's milk banking: microbiologic aspects

    Can J Publ Health

    (1984)
  • J.E. Tyson et al.

    Collection methods and contamination of bank milk

    Arch Dis Child

    (1982)
  • S. Williamson et al.

    Organisation of bank of raw and pasteurised human milk for neonatal intensive care

    BMJ

    (1978)
  • C.W. Kruse

    Sanitary control of milk

  • L.G. Donowitz et al.

    Contaminated breast milk: a source of Klebsiella bacteremia in a newborn intensive care unit

    Rev Infect Dis

    (1981)
  • H.G. Stiver et al.

    Nosocomial colonization and infection due to E. coli 125: k70 epidemiologically linked to expressed breast milk feedings

    Can J Publ Health

    (1977)
  • Cited by (46)

    • Emerging frontiers in human milk microbiome research and suggested primers for 16S rRNA gene analysis

      2021, Computational and Structural Biotechnology Journal
      Citation Excerpt :

      In the late ‘60 s, the presence of bacteria in human milk was related to the low levels of personal hygiene and environmental sanitation in women from Guatemala [8] (Table 1). Later, diverse methods were employed in order to make milk ‘bacteriologically safe’, such as heating and freezing [9,10]. By the late ‘80 s it had been recognized that human milk contained growth-promoting substances postulated to be involved in the development of microbiota [11].

    • Breast milk microbiota: A review of the factors that influence composition

      2020, Journal of Infection
      Citation Excerpt :

      All identified studies were case series and therefore at high risk for bias. Several studies were excluded, because the overall composition of the BM was not assessed,18,68–75 BM was pasturised76, they focused on the detection of potential pathogens77–87, or did not provide enough details about the samples.88 The results of the studies are summarised in Table 1 and Fig. 1.

    • Comparison of bacterial counts in expressed breast milk following standard or strict infection control regimens in neonatal intensive care units: Compliance of mothers does matter

      2016, Journal of Hospital Infection
      Citation Excerpt :

      There are few published data on the impact of hygiene procedures on bacterial counts in EBM, and these show conflicting results. One previous study reported that instructing mothers to standardize hygiene regimens had no effect on EBM contamination rates.8 Another study found that breast cleansing before expression using a skin detergent (Phisoderm, Mentholatum Ltd, St. Catharines, Canada) was associated with significantly lower colony counts.9

    View all citing articles on Scopus
    View full text