Environmental survey for Listeria species in California milk processing plants

Bruce R. Charlton, Hailu Kinde, Leon H. Jensen

Research output: Contribution to journalReview article

39 Citations (Scopus)

Abstract

This survey was undertaken to determine the prevalence of Listeria monocytogenes and Listeria spp. in environmental samples obtained from milk processing plants located throughout California. Identification of Listeria spp. other than L. monocytogenes was not made. Milk processing plants were categorized as to type of product produced and subdivided into areas based on manufacturing activity occurring in that area. A total of 597 environmental samples from 156 plants were analyzed in the six month period of January through July 1987. Listeria spp. were isolated from 75 (12.6%) of the samples. Thirty-eight of the Listeria spp. (50.7%) were identified as L. monocytogenes. Fortysix plants (29.5%) yielded positive results for Listeria spp., of which, 31 plants (19.9%) were positive for L. monocytogenes. Listeria was recovered more frequently from fluid milk product plants and frozen milk product plants. Likewise, Listeria was isolated most frequently from the packaging-filling room location within a plant and least frequently from the raw milk receiving room. Although Listeria spp. was isolated most frequently from the conveyor site, the drain site within a plant location gave a Listeria isolation rate similar to the total number of Listeria positive sites within that plant location.

Original languageEnglish (US)
Pages (from-to)198-201
Number of pages4
JournalJournal of Food Protection
Volume53
Issue number3
StatePublished - Mar 1 1990
Externally publishedYes

Fingerprint

Listeria
food processing
Milk
Listeria monocytogenes
dairy products
frozen milk
Surveys and Questionnaires
fluid milk
Product Packaging
raw milk
sampling
packaging
manufacturing

ASJC Scopus subject areas

  • Food Science
  • Microbiology

Cite this

Environmental survey for Listeria species in California milk processing plants. / Charlton, Bruce R.; Kinde, Hailu; Jensen, Leon H.

In: Journal of Food Protection, Vol. 53, No. 3, 01.03.1990, p. 198-201.

Research output: Contribution to journalReview article

Charlton, Bruce R. ; Kinde, Hailu ; Jensen, Leon H. / Environmental survey for Listeria species in California milk processing plants. In: Journal of Food Protection. 1990 ; Vol. 53, No. 3. pp. 198-201.
@article{5e3a744e41434ec2b11c88ff8291d873,
title = "Environmental survey for Listeria species in California milk processing plants",
abstract = "This survey was undertaken to determine the prevalence of Listeria monocytogenes and Listeria spp. in environmental samples obtained from milk processing plants located throughout California. Identification of Listeria spp. other than L. monocytogenes was not made. Milk processing plants were categorized as to type of product produced and subdivided into areas based on manufacturing activity occurring in that area. A total of 597 environmental samples from 156 plants were analyzed in the six month period of January through July 1987. Listeria spp. were isolated from 75 (12.6{\%}) of the samples. Thirty-eight of the Listeria spp. (50.7{\%}) were identified as L. monocytogenes. Fortysix plants (29.5{\%}) yielded positive results for Listeria spp., of which, 31 plants (19.9{\%}) were positive for L. monocytogenes. Listeria was recovered more frequently from fluid milk product plants and frozen milk product plants. Likewise, Listeria was isolated most frequently from the packaging-filling room location within a plant and least frequently from the raw milk receiving room. Although Listeria spp. was isolated most frequently from the conveyor site, the drain site within a plant location gave a Listeria isolation rate similar to the total number of Listeria positive sites within that plant location.",
author = "Charlton, {Bruce R.} and Hailu Kinde and Jensen, {Leon H.}",
year = "1990",
month = "3",
day = "1",
language = "English (US)",
volume = "53",
pages = "198--201",
journal = "Journal of Food Protection",
issn = "0362-028X",
publisher = "International Association for Food Protection",
number = "3",

}

TY - JOUR

T1 - Environmental survey for Listeria species in California milk processing plants

AU - Charlton, Bruce R.

AU - Kinde, Hailu

AU - Jensen, Leon H.

PY - 1990/3/1

Y1 - 1990/3/1

N2 - This survey was undertaken to determine the prevalence of Listeria monocytogenes and Listeria spp. in environmental samples obtained from milk processing plants located throughout California. Identification of Listeria spp. other than L. monocytogenes was not made. Milk processing plants were categorized as to type of product produced and subdivided into areas based on manufacturing activity occurring in that area. A total of 597 environmental samples from 156 plants were analyzed in the six month period of January through July 1987. Listeria spp. were isolated from 75 (12.6%) of the samples. Thirty-eight of the Listeria spp. (50.7%) were identified as L. monocytogenes. Fortysix plants (29.5%) yielded positive results for Listeria spp., of which, 31 plants (19.9%) were positive for L. monocytogenes. Listeria was recovered more frequently from fluid milk product plants and frozen milk product plants. Likewise, Listeria was isolated most frequently from the packaging-filling room location within a plant and least frequently from the raw milk receiving room. Although Listeria spp. was isolated most frequently from the conveyor site, the drain site within a plant location gave a Listeria isolation rate similar to the total number of Listeria positive sites within that plant location.

AB - This survey was undertaken to determine the prevalence of Listeria monocytogenes and Listeria spp. in environmental samples obtained from milk processing plants located throughout California. Identification of Listeria spp. other than L. monocytogenes was not made. Milk processing plants were categorized as to type of product produced and subdivided into areas based on manufacturing activity occurring in that area. A total of 597 environmental samples from 156 plants were analyzed in the six month period of January through July 1987. Listeria spp. were isolated from 75 (12.6%) of the samples. Thirty-eight of the Listeria spp. (50.7%) were identified as L. monocytogenes. Fortysix plants (29.5%) yielded positive results for Listeria spp., of which, 31 plants (19.9%) were positive for L. monocytogenes. Listeria was recovered more frequently from fluid milk product plants and frozen milk product plants. Likewise, Listeria was isolated most frequently from the packaging-filling room location within a plant and least frequently from the raw milk receiving room. Although Listeria spp. was isolated most frequently from the conveyor site, the drain site within a plant location gave a Listeria isolation rate similar to the total number of Listeria positive sites within that plant location.

UR - http://www.scopus.com/inward/record.url?scp=84961837984&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84961837984&partnerID=8YFLogxK

M3 - Review article

AN - SCOPUS:84961837984

VL - 53

SP - 198

EP - 201

JO - Journal of Food Protection

JF - Journal of Food Protection

SN - 0362-028X

IS - 3

ER -