Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plant

Detalhes bibliográficos
Autor(a) principal: Mörschbächer,Vivian
Data de Publicação: 2017
Outros Autores: Rempel,Claudete, Maciel,Mônica
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Arquivos do instituto biológico (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1808-16572017000100234
Resumo: ABSTRACT: Transport of cooled raw milk in bulk has greatly improved the quality of the raw material collected by dairy plants as it reduces the proliferation of mesophilic microorganisms that cause milk acidity and hinder its processing. However, refrigeration has favored the growth of psychrotrophic microorganisms which are able to grow at low temperatures (below 10ºC) and that produce heat resistant enzymes which degrade some milk components, reducing milk shelf life and causing organoleptic changes. The aim of this paper was to evaluate the microbiological quality of raw milk in dairy farms and after its transport to the processing dairy plant, through plate counting of mesophilic and psychrotrophic microorganisms. Fourteen milk samples were collected from tanks of the dairy-farming properties, and one sample was collected from their milk transport tanker at the entrance of the processing plant. Our results showed that the mean number of mesophilic microorganisms was higher in samples collected straight from the dairy farm tanks than in the samples collected from the transportation tankers at the entrance of the plant. Of the 14 sampled tanks, 64.3% were non-compliant with legislation. The sample collected from the milk transportation tanker containing milk from all properties showed a higher mean number of psychrotrophic microorganisms than the dairy farm samples. We conclude that the milk from dairy properties showed a higher amount of mesophilic microorganisms, and after transportation, at the entrance of the processing plant, there is a higher amount of psychrotrophic microorganisms.
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spelling Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plantquality of milkmesophilicpsychrotrophiccontaminationABSTRACT: Transport of cooled raw milk in bulk has greatly improved the quality of the raw material collected by dairy plants as it reduces the proliferation of mesophilic microorganisms that cause milk acidity and hinder its processing. However, refrigeration has favored the growth of psychrotrophic microorganisms which are able to grow at low temperatures (below 10ºC) and that produce heat resistant enzymes which degrade some milk components, reducing milk shelf life and causing organoleptic changes. The aim of this paper was to evaluate the microbiological quality of raw milk in dairy farms and after its transport to the processing dairy plant, through plate counting of mesophilic and psychrotrophic microorganisms. Fourteen milk samples were collected from tanks of the dairy-farming properties, and one sample was collected from their milk transport tanker at the entrance of the processing plant. Our results showed that the mean number of mesophilic microorganisms was higher in samples collected straight from the dairy farm tanks than in the samples collected from the transportation tankers at the entrance of the plant. Of the 14 sampled tanks, 64.3% were non-compliant with legislation. The sample collected from the milk transportation tanker containing milk from all properties showed a higher mean number of psychrotrophic microorganisms than the dairy farm samples. We conclude that the milk from dairy properties showed a higher amount of mesophilic microorganisms, and after transportation, at the entrance of the processing plant, there is a higher amount of psychrotrophic microorganisms.Instituto Biológico2017-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1808-16572017000100234Arquivos do Instituto Biológico v.84 2017reponame:Arquivos do instituto biológico (Online)instname:Instituto Biológico (IB)instacron:IBIO10.1590/1808-1657000422016info:eu-repo/semantics/openAccessMörschbächer,VivianRempel,ClaudeteMaciel,Mônicaeng2018-04-13T00:00:00Zoai:scielo:S1808-16572017000100234Revistahttp://www.biologico.sp.gov.br/arquivos_bio.phphttps://old.scielo.br/oai/scielo-oai.php||arquivos@biologico.sp.gov.br1808-16570020-3653opendoar:2018-04-13T00:00Arquivos do instituto biológico (Online) - Instituto Biológico (IB)false
dc.title.none.fl_str_mv Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plant
title Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plant
spellingShingle Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plant
Mörschbächer,Vivian
quality of milk
mesophilic
psychrotrophic
contamination
title_short Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plant
title_full Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plant
title_fullStr Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plant
title_full_unstemmed Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plant
title_sort Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plant
author Mörschbächer,Vivian
author_facet Mörschbächer,Vivian
Rempel,Claudete
Maciel,Mônica
author_role author
author2 Rempel,Claudete
Maciel,Mônica
author2_role author
author
dc.contributor.author.fl_str_mv Mörschbächer,Vivian
Rempel,Claudete
Maciel,Mônica
dc.subject.por.fl_str_mv quality of milk
mesophilic
psychrotrophic
contamination
topic quality of milk
mesophilic
psychrotrophic
contamination
description ABSTRACT: Transport of cooled raw milk in bulk has greatly improved the quality of the raw material collected by dairy plants as it reduces the proliferation of mesophilic microorganisms that cause milk acidity and hinder its processing. However, refrigeration has favored the growth of psychrotrophic microorganisms which are able to grow at low temperatures (below 10ºC) and that produce heat resistant enzymes which degrade some milk components, reducing milk shelf life and causing organoleptic changes. The aim of this paper was to evaluate the microbiological quality of raw milk in dairy farms and after its transport to the processing dairy plant, through plate counting of mesophilic and psychrotrophic microorganisms. Fourteen milk samples were collected from tanks of the dairy-farming properties, and one sample was collected from their milk transport tanker at the entrance of the processing plant. Our results showed that the mean number of mesophilic microorganisms was higher in samples collected straight from the dairy farm tanks than in the samples collected from the transportation tankers at the entrance of the plant. Of the 14 sampled tanks, 64.3% were non-compliant with legislation. The sample collected from the milk transportation tanker containing milk from all properties showed a higher mean number of psychrotrophic microorganisms than the dairy farm samples. We conclude that the milk from dairy properties showed a higher amount of mesophilic microorganisms, and after transportation, at the entrance of the processing plant, there is a higher amount of psychrotrophic microorganisms.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1808-16572017000100234
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1808-16572017000100234
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1808-1657000422016
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Instituto Biológico
publisher.none.fl_str_mv Instituto Biológico
dc.source.none.fl_str_mv Arquivos do Instituto Biológico v.84 2017
reponame:Arquivos do instituto biológico (Online)
instname:Instituto Biológico (IB)
instacron:IBIO
instname_str Instituto Biológico (IB)
instacron_str IBIO
institution IBIO
reponame_str Arquivos do instituto biológico (Online)
collection Arquivos do instituto biológico (Online)
repository.name.fl_str_mv Arquivos do instituto biológico (Online) - Instituto Biológico (IB)
repository.mail.fl_str_mv ||arquivos@biologico.sp.gov.br
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