Qualidade microbiológica de leite humano obtido em banco de leite
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Data
2003
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Objective
The objectives of the present study were to determine the prevalence of potentially
pathogenic microorganisms that indicate the hygienic and sanitary conditions of
human milk samples collected at a Human Milk Bank.
Methods
Three hundred and thirty eight (338) samples of human milk collected from a milk ordebank
in a maternity in the municipality of Goiânia, in the state of Goias, Brazil were
submitted to microbiological analysis. The latter were plated on McConkey agar
according to the type of bacteria. Among the total number of samples collected, 194
consisted of raw milk and the remaining 144 were pasteurized milk.
Results
The presence of Staphylococcus spp., Streptococcus spp., yeasts and molds, and
Enterobacteriaceae was verified in the raw milk samples. Staphylococcus aureus were
isolated in 10 (5.2%) samples, Staphylococcus epidermidis in 28 (14.4%) samples,
Streptococcus spp. in three (1.6%) samples, yeasts and molds in 43 (22.2%) and
Enterobacteriaceae in 49 (25.3%) samples. In a hundred and forty four (144) samples
which underwent thermal treatment Staphylococcus aureus was detected in five (3.5%)
samples, Staphylococcus epidermidis in 15 (10.4%), Staphylococcus lugdenensis in
two (1.4%), Streptococcus spp. in four (2.8%), yeasts and molds in 37 (25.7%), and
Enterobacteriaceae in nine (6.3%).
Conclusions
Analysis indicated a high degree of contamination in raw human milk, and as for the
pasteurized milk, despite elimination of the great majority of potentially pathogenic
microorganisms, the percentage of yeasts and molds was higher than in raw milk,
demonstrating that a lower degree of initial contamination would be necessary for
pasteurization to be an efficient means of microbiological control.
Descrição
Palavras-chave
Bancos de leite, Controle de qualidade, Leite humano, Milk banks, Milk, human, Quality control
Citação
SERAFINI, Àlvaro B. et al. Qualidade microbiológica de leite humano obtido em banco de leite. Revista de Saúde Pública, São Paulo, v. 37, n. 6, p. 775-779, 2003.