Microbiological profile of raw refrigerated and processed bovine milk at dairy industries from Vale do Taquari, Rio Grande do Sul, Brazil
ABSTRACT Milk is an essential food, widely consumed by the population. Brazil is one of the world’s largest producers of milk. Milk quality is influenced by several factors in all its stages of production. The aim of this study was to determine the microbiological profile of refrigerated and processed raw bovine milk from industries in Vale do Taquari, state of Rio Grande do Sul, Brazil, using metagenomic analysis. A total of six samples were collected, one of refrigerated raw milk from the tanker truck, one of pasteurized milk and one of milk sterilized by the ultra-high temperature (UHT) process, in each of the industries. The identification of the milk microbiota was performed by sequencing the 16S rRNA gene. The results show that refrigerated raw milk has a greater number of microorganisms, followed by pasteurized milk and sterilized milk, successively. Processed milk showed the presence of beneficial microorganisms such as Streptococcus thermophilus and Streptococcus macedonicus. Nevertheless, even UHT milk showed the presence of microorganisms considered harmful, such as the Bacillus cereus group, Aeromonas dhakensis, Enterobacter bacterium and Acinetobacter haemolyticus. Metagenomics is a valuable tool for the thorough evaluation of the milk microbiota in order to implement the processing stages in industries.
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Instituto Biológico
2022
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oai:scielo:S1808-165720220001002112022-12-14Microbiological profile of raw refrigerated and processed bovine milk at dairy industries from Vale do Taquari, Rio Grande do Sul, BrazilMüller,ThaísLunardi,Luca MadalossoMaciel,Mônica JachettiRempel,Claudete microorganisms microbiome genetic sequencing ABSTRACT Milk is an essential food, widely consumed by the population. Brazil is one of the world’s largest producers of milk. Milk quality is influenced by several factors in all its stages of production. The aim of this study was to determine the microbiological profile of refrigerated and processed raw bovine milk from industries in Vale do Taquari, state of Rio Grande do Sul, Brazil, using metagenomic analysis. A total of six samples were collected, one of refrigerated raw milk from the tanker truck, one of pasteurized milk and one of milk sterilized by the ultra-high temperature (UHT) process, in each of the industries. The identification of the milk microbiota was performed by sequencing the 16S rRNA gene. The results show that refrigerated raw milk has a greater number of microorganisms, followed by pasteurized milk and sterilized milk, successively. Processed milk showed the presence of beneficial microorganisms such as Streptococcus thermophilus and Streptococcus macedonicus. Nevertheless, even UHT milk showed the presence of microorganisms considered harmful, such as the Bacillus cereus group, Aeromonas dhakensis, Enterobacter bacterium and Acinetobacter haemolyticus. Metagenomics is a valuable tool for the thorough evaluation of the milk microbiota in order to implement the processing stages in industries.info:eu-repo/semantics/openAccessInstituto BiológicoArquivos do Instituto Biológico v.89 20222022-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1808-16572022000100211en10.1590/1808-1657000302021 |
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Müller,Thaís Lunardi,Luca Madalosso Maciel,Mônica Jachetti Rempel,Claudete |
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Müller,Thaís Lunardi,Luca Madalosso Maciel,Mônica Jachetti Rempel,Claudete Microbiological profile of raw refrigerated and processed bovine milk at dairy industries from Vale do Taquari, Rio Grande do Sul, Brazil |
author_facet |
Müller,Thaís Lunardi,Luca Madalosso Maciel,Mônica Jachetti Rempel,Claudete |
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Müller,Thaís |
title |
Microbiological profile of raw refrigerated and processed bovine milk at dairy industries from Vale do Taquari, Rio Grande do Sul, Brazil |
title_short |
Microbiological profile of raw refrigerated and processed bovine milk at dairy industries from Vale do Taquari, Rio Grande do Sul, Brazil |
title_full |
Microbiological profile of raw refrigerated and processed bovine milk at dairy industries from Vale do Taquari, Rio Grande do Sul, Brazil |
title_fullStr |
Microbiological profile of raw refrigerated and processed bovine milk at dairy industries from Vale do Taquari, Rio Grande do Sul, Brazil |
title_full_unstemmed |
Microbiological profile of raw refrigerated and processed bovine milk at dairy industries from Vale do Taquari, Rio Grande do Sul, Brazil |
title_sort |
microbiological profile of raw refrigerated and processed bovine milk at dairy industries from vale do taquari, rio grande do sul, brazil |
description |
ABSTRACT Milk is an essential food, widely consumed by the population. Brazil is one of the world’s largest producers of milk. Milk quality is influenced by several factors in all its stages of production. The aim of this study was to determine the microbiological profile of refrigerated and processed raw bovine milk from industries in Vale do Taquari, state of Rio Grande do Sul, Brazil, using metagenomic analysis. A total of six samples were collected, one of refrigerated raw milk from the tanker truck, one of pasteurized milk and one of milk sterilized by the ultra-high temperature (UHT) process, in each of the industries. The identification of the milk microbiota was performed by sequencing the 16S rRNA gene. The results show that refrigerated raw milk has a greater number of microorganisms, followed by pasteurized milk and sterilized milk, successively. Processed milk showed the presence of beneficial microorganisms such as Streptococcus thermophilus and Streptococcus macedonicus. Nevertheless, even UHT milk showed the presence of microorganisms considered harmful, such as the Bacillus cereus group, Aeromonas dhakensis, Enterobacter bacterium and Acinetobacter haemolyticus. Metagenomics is a valuable tool for the thorough evaluation of the milk microbiota in order to implement the processing stages in industries. |
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Instituto Biológico |
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2022 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1808-16572022000100211 |
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