Umeå University's logo

umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Milking system and premilking routines have strong effect on the microbial community in bulk tank milk
Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Norrmejerier Ek. Förening, Umeå, Sweden.
Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences, Umeå, Sweden.
Show others and affiliations
2022 (English)In: Journal of Dairy Science, ISSN 0022-0302, E-ISSN 1525-3198, Vol. 105, no 1, p. 123-139Article in journal (Refereed) Published
Abstract [en]

In this study, we investigated the variation in the microbial community present in bulk tank milk samples and the potential effect of different farm management factors. Bulk tank milk samples were collected repeatedly over one year from 42 farms located in northern Sweden. Total and thermoresistant bacteria counts and 16S rRNA gene-based amplicon sequencing were used to characterize microbial community composition. The microbial community was in general heterogeneous both within and between different farms and the community composition in the bulk tank milk was commonly dominated by Pseudomonas, Acinetobacter, Streptococcus, unclassified Peptostreptococcaceae, and Staphylococcus. Principal component analysis including farm factor variables and microbial taxa data revealed that the microbial community in milk was affected by type of milking system. Milk from farms using an automatic (robot) milking system (AMS) and loose housing showed different microbial community composition compared with milk from tiestall farms. A discriminant analysis model revealed that this difference was dependent on several microbial taxa. Among farms using an automatic milking system, there were further differences in the microbial community composition depending on the brand of the milking robot used. On tiestall farms, routines for teat preparation and cleaning of the milking equipment affected the microbial community composition in milk. Total bacteria count (TBC) in milk differed between the farm types, and TBC were higher on AMS than tiestall farms (log 4.05 vs. log 3.79 TBC/mL for AMS and tiestalls, respectively). Among tiestall farms, milk from farms using a chemical agent in connection to teat preparation and a more frequent use of acid to clean the milking equipment had lower TBC in milk, than milk from farms using water for teat preparation and a less frequent use of acid to clean the milking equipment (log 3.68 vs. 4.02 TBC/mL). There were no significant differences in the number of thermoresistant bacteria between farm types. The evaluated factors explained only a small proportion of total variation in the microbiota data, however, despite this, the study highlights the effect of routines associated with teat preparation and cleaning of the milking equipment on raw milk microbiota, irrespective of type of milking system used.

Place, publisher, year, edition, pages
Elsevier, 2022. Vol. 105, no 1, p. 123-139
Keywords [en]
bulk tank milk microbiota, microbial community composition, milking system, premilking routines
National Category
Animal and Dairy Science
Identifiers
URN: urn:nbn:se:umu:diva-191308DOI: 10.3168/jds.2021-20661ISI: 000734351700011PubMedID: 34696914Scopus ID: 2-s2.0-85117776726OAI: oai:DiVA.org:umu-191308DiVA, id: diva2:1627424
Funder
The Kamprad Family FoundationAvailable from: 2022-01-13 Created: 2022-01-13 Last updated: 2022-07-14Bibliographically approved

Open Access in DiVA

fulltext(3039 kB)62 downloads
File information
File name FULLTEXT01.pdfFile size 3039 kBChecksum SHA-512
23027618539fdfd1adaeabbf3c11d44af60c5c9377c4074f3ce4355b3df801efba594b86d54edcd04a5295ffeef4351e340bbee152e6e4fb3b28c37dc82f4839
Type fulltextMimetype application/pdf

Other links

Publisher's full textPubMedScopus

Authority records

Nilsson, David

Search in DiVA

By author/editor
Nilsson, David
By organisation
Department of Chemistry
In the same journal
Journal of Dairy Science
Animal and Dairy Science

Search outside of DiVA

GoogleGoogle Scholar
Total: 62 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 182 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf