Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1985-9-16
pubmed:abstractText
Previous studies have shown that bacteria maintained in a low-nutrient "natural" environment such as swimming pool water are much more resistant to disinfection by various chemical agents than strains maintained on rich media. In the present study a comparison was made of the chlorine (Cl2) susceptibility of hot-water tank isolates of Legionella pneumophila maintained in tap water and strains passaged on either nonselective buffered charcoal-yeast extract or selective differential glycine-vancomycin-polymyxin agar medium. Our earlier work has shown that environmental and clinical isolates of L. pneumophila maintained on agar medium are much more resistant to Cl2 than coliforms are. Under the present experimental conditions (21 degrees C, pH 7.6 to 8.0, and 0.25 mg of free residual Cl2 per liter, we found the tap water-maintained L. pneumophila strains to be even more resistant than the agar-passaged isolates. Under these conditions, 99% kill of tap water-maintained strains of L. pneumophila was usually achieved within 60 to 90 min compared with 10 min for agar-passaged strains. Samples from plumbing fixtures in a hospital yielded legionellae which were "super"-chlorine resistant when assayed under natural conditions. After one agar passage their resistance dropped to levels of comparable strains which had not been previously exposed to additional chlorination. These studies more closely approximate natural conditions than our previous work and show that tap water-maintained L. pneumophila is even more resistant to Cl2 than its already resistant agar medium-passaged counterpart.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-104656, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-13637886, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-359594, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-373549, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-384910, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-434640, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-434649, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-4579072, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-4624209, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-5927040, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-6247518, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-6344791, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-6360045, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-6413413, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-6660882, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-6735976, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-6756305, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-7103477, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-7103487, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-7149722, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-7251523, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-7316506, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-7351928, http://linkedlifedata.com/resource/pubmed/commentcorrection/3896142-7391615
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0099-2240
pubmed:author
pubmed:issnType
Print
pubmed:volume
50
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
21-6
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Enhanced chlorine resistance of tap water-adapted Legionella pneumophila as compared with agar medium-passaged strains.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't