Abstract
This study aimed to evaluate the application of thermosonication for the viability of Staphylococcus aureus and the antioxidant activity of HM. The US effect on the S. aureus was measured by counting viable cells in discarded HM immediately before and after different treatments varying time (1, 5 and 10 minutes) and temperature (20, 30, 40, 50 and 60 °C) through surface plating on standard agar. The antioxidant activity evaluation was carried out by 2, 2-diphenyl-1-picrylhydrazyl (DPPH) scavenging method. With Regarding microbiological quality, it can be concluded that treatment with US at 60 °C for 10 minutes was the most effective in terms of reducing the viability of S. aureus, in addition to presenting a significant increase in the content of antioxidants when compared to raw and pasteurized milk samples.
Highlights
Human milk (HM) is especially suitable for infants, both with regard to its nutritional composition and bioactive compounds
The microbiological quality of human milk distributed by human milk banks (HMB) is a subject of wide public health concern, since the children who will consume this food have a low resistance to neonatal infections, and HM is an excellent culture medium for various types of microorganisms (Silveira et al, 2012)
This emphasizes the importance of ensuring the microbiological quality of HM distributed by HMB, since the children who will consume this food have a low resistance to neonatal infections
Summary
Human milk (HM) is especially suitable for infants, both with regard to its nutritional composition and bioactive compounds. Unlike infant formula, which is standardized within a very narrow range of components, HM is a dynamic biofluid, the composition of which varies according to the stage of lactation and between term and preterm babies (Ballard & Morrow, 2013) That is why it is considered by health professionals and breastfeeding defense forums as the “gold standard” for its numerous benefits, which include: savings, practicality, psycho-emotional health, immunological protection, in addition to being ecologically and nutritionally superior in relation to infant formula (Erick, 2018). It is important to consider that HM donations are primarily intended for premature and/or ill newborn (Agência Nacional de Vigilância Sanitária, 2008) In this sense, the microbiological quality of human milk distributed by HMB is a subject of wide public health concern, since the children who will consume this food have a low resistance to neonatal infections, and HM is an excellent culture medium for various types of microorganisms (Silveira et al, 2012)
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