The study was designed to test for the existence of a correlation between the total population of aerobic mesophilic microorganisms in processed raw breastmilk from a human milk bank and the Dornic ...acidity of that milk.
Two hundred consecutive samples of thawed expressed human breastmilk obtained from human milk bank, prior to pasteurization. Dornic acidity was titrated in triplicate for each sample. Aerobic mesophilic microorganisms were then plate counted. Data were analyzed to detect correlations between variables, using Pearson's coefficient, and the level of significance was set at p < or = 0.05.
In the samples analyzed, Dornic acidity levels had a positive (R = 0.948) and statistically significant (p < or = 0.001) correlation with the population of aerobic mesophilic microorganisms (CFU/mL).
The data obtained here support to the conclusion that Dornic titration is an effective method for the indirect evaluation of bacterial growth in expressed human milk.
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.
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.
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%.
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.
To compare an alternative method to the most probable number (MPN) test for the detection of total coliform present in manually expressed human milk.
343 samples of manually expressed human milk from ...flasks donated to the Human Milk Bank of Instituto Fernandes Figueira--IFF were sent to the Laboratory of Food Control of IFF. The samples were used for comparing both methods, i.e., the most probable number (MPN) method, as described in the "Standard methods for the examination of dairy products", and the alternative method.
Coliforms were detected in 31.2% of the samples analyzed, with populations ranging from 3.0 x 10(0) to 1.1 x 10(4) total coliform MPN/mL. The comparison between classical and alternative methods showed similar results regarding the presence of coliform microorganisms in expressed human milk samples. The alternative method detected the presence of total coliform in all contaminated and in four noncontaminated samples according to the MNP method.
The alternative test allows the detection of the presence or absence of coliforms and it is useful for the quality control of pasteurized flasks containing manually expressed human milk manipulated at human milk banks. Therefore, we conclude that the alternative test can be used in the routine of human milk banks as a substitute for the MNP method, since its cost is equivalent to 1/7 of the cost of the traditional method.
OBJETIVO: O estudo foi delineado para testar a existência de correlação entre a população total de microrganismos aeróbios mesófilos e os valores de acidez Dornic no leite humano ordenhado cru ...processado em banco de leite humano. MÉTODOS: Foram analisadas 200 amostras consecutivas de leite humano ordenhado, em banco de leite humano, antes da pasteurização. A acidez Dornic foi titulada nas amostras em triplicata. A seguir, foi realizada a contagem em placa para microrganismos aeróbios mesófilos. Os dados foram avaliados pela correlação de Pearson entre as variáveis, e o nível de significância foi estabelecido em p < 0,05. RESULTADOS: Os valores de acidez Dornic mostraram correlação positiva (R = 0,948) e estatisticamente significante (p < 0,001) com a população de microrganismos aeróbios mesófilos (UFC/mL) nas amostras analisadas. CONCLUSÃO: Os dados obtidos permitem concluir que a titulação Dornic é um método eficaz para avaliar indiretamente o crescimento bacteriano no leite humano ordenhado.OBJECTIVE: The study was designed to test for the existence of a correlation between the total population of aerobic mesophilic microorganisms in processed raw breastmilk from a human milk bank and the Dornic acidity of that milk. METHODS: Two hundred consecutive samples of thawed expressed human breastmilk obtained from human milk bank, prior to pasteurization. Dornic acidity was titrated in triplicate for each sample. aerobic mesophilic microorganisms were then plate counted. Data were analyzed to detect correlations between variables, using Pearson's coefficient, and the level of significance was set at p < 0.05. RESULTS: In the samples analyzed, Dornic acidity levels had a positive (R = 0.948) and statistically significant (p < 0.001) correlation with the population of aerobic mesophilic microorganisms (CFU/mL). CONCLUSIONS: The data obtained here support to the conclusion that Dornic titration is an effective method for the indirect evaluation of bacterial growth in expressed human milk.
OBJETIVO: Verificar a existência de relação entre a presença de off-flavor e a carga de microrganismos em amostras de leite humano ordenhado rejeitadas pelo controle de qualidade de um banco de leite ...humano. MÉTODOS: Testou-se em 30 amostras de leite humano ordenhado com presença de off-flavor a ocorrência dos seguintes microrganismos: aeróbios mesófilos, psicrotróficos, proteolíticos, proteolíticos-psicrotróficos, termodúricos, termodúricos-psicrotróficos, bactérias lácticas, lipolíticos, bolores e leveduras e Staphylococcus aureus, coliformes totais e coliformes termotolerantes, de acordo com métodos oficiais. RESULTADOS: A ocorrência percentual dos microrganismos foi a seguinte: aeróbios mesófilos = 80%; psicrotróficos = 36,7%; proteolíticos = 46,7%; proteolíticos-psicrotróficos = 16,7%; termodúricos = 6,7%; termodúricos-psicrotróficos = 0%; bactérias lácticas = 50%; lipolíticos = 10%; bolores e leveduras = 6,7%; S. aureus = 30%; coliformes totais = 53,3%; e coliformes termotolerantes = 16,7%. CONCLUSÃO: Observou-se relação consistente entre a presença de off-flavor e elevadas contagens dos microrganismos nas amostras analisadas, o que reforça a importância da pesquisa de off-flavor na seleção e no controle da qualidade dos bancos de leite humano.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.
OBJETIVO: O estudo foi delineado para testar a existência de correlação entre a população total de microrganismos aeróbios mesófilos e os valores de acidez Dornic no leite humano ordenhado cru ...processado em banco de leite humano. MÉTODOS: Foram analisadas 200 amostras consecutivas de leite humano ordenhado, em banco de leite humano, antes da pasteurização. A acidez Dornic foi titulada nas amostras em triplicata. A seguir, foi realizada a contagem em placa para microrganismos aeróbios mesófilos. Os dados foram avaliados pela correlação de Pearson entre as variáveis, e o nível de significância foi estabelecido em p < 0,05. RESULTADOS: Os valores de acidez Dornic mostraram correlação positiva (R = 0,948) e estatisticamente significante (p < 0,001) com a população de microrganismos aeróbios mesófilos (UFC/mL) nas amostras analisadas. CONCLUSÃO: Os dados obtidos permitem concluir que a titulação Dornic é um método eficaz para avaliar indiretamente o crescimento bacteriano no leite humano ordenhado.
Breastfeeding: a nature-culture hybrid Almeida, João Aprígio Guerra de; Novak, Franz R.
Jornal de pediatria,
12/2004, Letnik:
80, Številka:
8
Journal Article
Breastfeeding: a nature-culture hybrid Almeida, João Aprígio Guerra de; Novak, Franz R.
Jornal de Pediatria,
11/2004, Letnik:
80, Številka:
8
Journal Article
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