The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine Milk and dairy products
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | https://doi.org/10.3389/fmicb.2017.00302 http://www.locus.ufv.br/handle/123456789/11986 |
Resumo: | Raw bovine milk is highly nutritious as well as pH-neutral, providing the ideal conditions for microbial growth. The microbiota of raw milk is diverse and originates from several sources of contamination including the external udder surface, milking equipment, air, water, feed, grass, feces, and soil. Many bacterial and fungal species can be found in raw milk. The autochthonous microbiota of raw milk immediately after milking generally comprises lactic acid bacteria such as Lactococcus, Lactobacillus, Streptococcus, and Leuconostoc species, which are technologically important for the dairy industry, although they do occasionally cause spoilage of dairy products. Differences in milking practices and storage conditions on each continent, country and region result in variable microbial population structures in raw milk. Raw milk is usually stored at cold temperatures, e.g., about 4°C before processing to reduce the growth of most bacteria. However, psychrotrophic bacteria can proliferate and contribute to spoilage of ultra-high temperature (UHT) treated and sterilized milk and other dairy products with a long shelf life due to their ability to produce extracellular heat resistant enzymes such as peptidases and lipases. Worldwide, species of Pseudomonas, with the ability to produce these spoilage enzymes, are the most common contaminants isolated from cold raw milk although other genera such as Serratia are also reported as important milk spoilers, while for others more research is needed on the heat resistance of the spoilage enzymes produced. The residual activity of extracellular enzymes after high heat treatment may lead to technological problems (off flavors, physico-chemical instability) during the shelf life of milk and dairy products. This review covers the contamination patterns of cold raw milk in several parts of the world, the growth potential of psychrotrophic bacteria, their ability to produce extracellular heat-resistant enzymes and the consequences for dairy products with a long shelf life. This problem is of increasing importance because of the large worldwide trade in fluid milk and milk powder. |
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The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine Milk and dairy productsMicrobial dynamicsPsychrotrophicPseudomonasSerratiaPeptidaseLipaseHeat-resistant enzymeSpoilageRaw bovine milk is highly nutritious as well as pH-neutral, providing the ideal conditions for microbial growth. The microbiota of raw milk is diverse and originates from several sources of contamination including the external udder surface, milking equipment, air, water, feed, grass, feces, and soil. Many bacterial and fungal species can be found in raw milk. The autochthonous microbiota of raw milk immediately after milking generally comprises lactic acid bacteria such as Lactococcus, Lactobacillus, Streptococcus, and Leuconostoc species, which are technologically important for the dairy industry, although they do occasionally cause spoilage of dairy products. Differences in milking practices and storage conditions on each continent, country and region result in variable microbial population structures in raw milk. Raw milk is usually stored at cold temperatures, e.g., about 4°C before processing to reduce the growth of most bacteria. However, psychrotrophic bacteria can proliferate and contribute to spoilage of ultra-high temperature (UHT) treated and sterilized milk and other dairy products with a long shelf life due to their ability to produce extracellular heat resistant enzymes such as peptidases and lipases. Worldwide, species of Pseudomonas, with the ability to produce these spoilage enzymes, are the most common contaminants isolated from cold raw milk although other genera such as Serratia are also reported as important milk spoilers, while for others more research is needed on the heat resistance of the spoilage enzymes produced. The residual activity of extracellular enzymes after high heat treatment may lead to technological problems (off flavors, physico-chemical instability) during the shelf life of milk and dairy products. This review covers the contamination patterns of cold raw milk in several parts of the world, the growth potential of psychrotrophic bacteria, their ability to produce extracellular heat-resistant enzymes and the consequences for dairy products with a long shelf life. This problem is of increasing importance because of the large worldwide trade in fluid milk and milk powder.Frontiers in Microbiology2017-10-10T18:08:36Z2017-10-10T18:08:36Z2017-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf1663-4365https://doi.org/10.3389/fmicb.2017.00302http://www.locus.ufv.br/handle/123456789/11986engVolume 8, Article 302, March 2017Machado, Solimar GonçalvesBaglinière, FrançoisMarchand, SophieCoillie, Els VanVanetti, Maria Cristina DantasBlock, Jan DeHeyndrickx, Marcinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T08:12:07Zoai:locus.ufv.br:123456789/11986Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T08:12:07LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.none.fl_str_mv |
The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine Milk and dairy products |
title |
The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine Milk and dairy products |
spellingShingle |
The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine Milk and dairy products Machado, Solimar Gonçalves Microbial dynamics Psychrotrophic Pseudomonas Serratia Peptidase Lipase Heat-resistant enzyme Spoilage |
title_short |
The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine Milk and dairy products |
title_full |
The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine Milk and dairy products |
title_fullStr |
The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine Milk and dairy products |
title_full_unstemmed |
The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine Milk and dairy products |
title_sort |
The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine Milk and dairy products |
author |
Machado, Solimar Gonçalves |
author_facet |
Machado, Solimar Gonçalves Baglinière, François Marchand, Sophie Coillie, Els Van Vanetti, Maria Cristina Dantas Block, Jan De Heyndrickx, Marc |
author_role |
author |
author2 |
Baglinière, François Marchand, Sophie Coillie, Els Van Vanetti, Maria Cristina Dantas Block, Jan De Heyndrickx, Marc |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Machado, Solimar Gonçalves Baglinière, François Marchand, Sophie Coillie, Els Van Vanetti, Maria Cristina Dantas Block, Jan De Heyndrickx, Marc |
dc.subject.por.fl_str_mv |
Microbial dynamics Psychrotrophic Pseudomonas Serratia Peptidase Lipase Heat-resistant enzyme Spoilage |
topic |
Microbial dynamics Psychrotrophic Pseudomonas Serratia Peptidase Lipase Heat-resistant enzyme Spoilage |
description |
Raw bovine milk is highly nutritious as well as pH-neutral, providing the ideal conditions for microbial growth. The microbiota of raw milk is diverse and originates from several sources of contamination including the external udder surface, milking equipment, air, water, feed, grass, feces, and soil. Many bacterial and fungal species can be found in raw milk. The autochthonous microbiota of raw milk immediately after milking generally comprises lactic acid bacteria such as Lactococcus, Lactobacillus, Streptococcus, and Leuconostoc species, which are technologically important for the dairy industry, although they do occasionally cause spoilage of dairy products. Differences in milking practices and storage conditions on each continent, country and region result in variable microbial population structures in raw milk. Raw milk is usually stored at cold temperatures, e.g., about 4°C before processing to reduce the growth of most bacteria. However, psychrotrophic bacteria can proliferate and contribute to spoilage of ultra-high temperature (UHT) treated and sterilized milk and other dairy products with a long shelf life due to their ability to produce extracellular heat resistant enzymes such as peptidases and lipases. Worldwide, species of Pseudomonas, with the ability to produce these spoilage enzymes, are the most common contaminants isolated from cold raw milk although other genera such as Serratia are also reported as important milk spoilers, while for others more research is needed on the heat resistance of the spoilage enzymes produced. The residual activity of extracellular enzymes after high heat treatment may lead to technological problems (off flavors, physico-chemical instability) during the shelf life of milk and dairy products. This review covers the contamination patterns of cold raw milk in several parts of the world, the growth potential of psychrotrophic bacteria, their ability to produce extracellular heat-resistant enzymes and the consequences for dairy products with a long shelf life. This problem is of increasing importance because of the large worldwide trade in fluid milk and milk powder. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-10-10T18:08:36Z 2017-10-10T18:08:36Z 2017-03-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
1663-4365 https://doi.org/10.3389/fmicb.2017.00302 http://www.locus.ufv.br/handle/123456789/11986 |
identifier_str_mv |
1663-4365 |
url |
https://doi.org/10.3389/fmicb.2017.00302 http://www.locus.ufv.br/handle/123456789/11986 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Volume 8, Article 302, March 2017 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
pdf application/pdf |
dc.publisher.none.fl_str_mv |
Frontiers in Microbiology |
publisher.none.fl_str_mv |
Frontiers in Microbiology |
dc.source.none.fl_str_mv |
reponame:LOCUS Repositório Institucional da UFV instname:Universidade Federal de Viçosa (UFV) instacron:UFV |
instname_str |
Universidade Federal de Viçosa (UFV) |
instacron_str |
UFV |
institution |
UFV |
reponame_str |
LOCUS Repositório Institucional da UFV |
collection |
LOCUS Repositório Institucional da UFV |
repository.name.fl_str_mv |
LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV) |
repository.mail.fl_str_mv |
fabiojreis@ufv.br |
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1817559995549483008 |