Jornal de Pediatria
Print version ISSN 0021-7557
NOVAK, Franz R.; JUNQUEIRA, Ana R.; DIAS, Manuela de S. P. C. and ALMEIDA, João A. G.. Sensorial analysis of expressed human milk and its microbial load. J. Pediatr. (Rio J.) [online]. 2008, vol.84, n.2, pp. 181-184. ISSN 0021-7557. http://dx.doi.org/10.1590/S0021-75572008000200016.
OBJECTIVE: To verify the existence of a relationship between presence of off-flavor and microorganism load in quality control rejected samples of expressed human milk from a donor milk bank. METHODS: A total of 30 samples of expressed human milk with off-flavor were tested for the occurrence of the following microorganisms: aerobic mesophilic, psycrotrophic, proteolytic, psycrotrophic proteolytic, thermoduric, psycrotrophic thermoduric, lactate and lipolytic bacteria, molds and yeasts and Staphylococcus aureus, total coliforms and thermophilic coliforms, in accordance with official methods. RESULTS: Percentage occurrence of microorganisms was as follows: aerobic mesophilic = 80%; psycrotrophic = 36.7%; proteolytic = 46.7%; psycrotrophic proteolytic = 16.7%; thermoduric = 6.7%; psycrotrophic thermoduric = 0%; lactate bacteria = 50%; lipolytic = 10%; molds and yeasts = 6.7%; S. aureus = 30%; total coliforms = 53.3%; and thermophilic coliforms = 16.7%. CONCLUSION: A consistent relationship between presence of off-flavor and elevated microorganism counting was observed in the analyzed samples. This correlation highlights the importance of off-flavor research during selection and quality control processes in human milk banks.
Keywords : Human milk; milk banks; quality control; food microbiology.