Linked Life Data

9835555

Source:http://linkedlifedata.com/resource/pubmed/id/9835555

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
1999-2-3
pubmed:abstractText
The genetic diversity of lactococci isolated from raw milk in the Camembert cheese Registered Designation of Origin area was studied. Two seasonal samples (winter and summer) of raw milk were obtained from six farms in two areas (Bessin and Bocage Falaisien) of Normandy. All of the strains analyzed had a Lactococcus lactis subsp. lactis phenotype, whereas the randomly amplified polymorphic DNA (RAPD) technique genotypically identified the strains as members of L. lactis subsp. lactis or L. lactis subsp. cremoris. The genotypes were confirmed by performing standard PCR with primers corresponding to a region of the histidine biosynthesis operon. The geographic distribution of each subspecies of L. lactis was determined; 80% of the Bocage Falaisien strains were members of L. lactis subsp. lactis, and 30.5% of the Bessin strains were members of L. lactis subsp. lactis. A dendrogram was produced from a computer analysis of the RAPD profiles in order to evaluate the diversity of the lactococci below the subspecies level. The coefficient of similarity for 117 of the 139 strains identified as members of L. lactis subsp. cremoris was as high as 66%. The L. lactis subsp. lactis strains were more heterogeneous and formed 10 separate clusters (the level of similarity among the clusters was 18%). Reference strains of L. lactis subsp. lactis fell into 2 of these 10 clusters, demonstrating that lactococcal isolates are clearly different. As determined by the RAPD profiles, some L. lactis subsp. lactis strains were specific to the farms from which they originated and were recovered throughout the year (in both summer and winter). Therefore, the typicality of L. lactis subsp. lactis strains was linked to the farm of origin rather than the area. These findings emphasize the significance of designation of origin and the specificity of "Camembert de Normandie" cheese.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-1622250, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-1713027, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-1979162, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-2259619, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-2275539, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-7506898, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-7574616, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-7812446, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-8554764, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-8879411, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-9161919, http://linkedlifedata.com/resource/pubmed/commentcorrection/9835555-9733685
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0099-2240
pubmed:author
pubmed:issnType
Print
pubmed:volume
64
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
4729-35
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
An ecological study of lactococci isolated from raw milk in the camembert cheese registered designation of origin area.
pubmed:affiliation
Laboratoire de Microbiologie Alimentaire, Université de Caen, Basse Normandie, 14032 Caen Cedex, France. corroler@ibba.unicaen.fr
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't