Linked Life Data

17234033

Source:http://linkedlifedata.com/resource/pubmed/id/17234033

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2007-1-19
pubmed:abstractText
Human cadaveric skin allografts are used in the treatment of burns and can be preserved in glycerol at high concentrations. Previously, glycerol has been attributed some antimicrobial effect. In an experimental set-up, we aimed at investigating this effect of prolonged incubation of bacteria in 85% glycerol. Staphylococcus epidermidis, Staphylococcus aureus, Pseudomonas aeruginosa, and Bacillus subtilis were incubated in 85% glycerol. The influence of duration of incubation and temperature on ultrastructure and viability were investigated. Unstressed cultures served as controls. Survival was studied after 24-36 h and 10 days incubation in 85% glycerol at 4 degrees C and 36 degrees C with transmission electron microscopy (TEM) and flow cytometry using viability stains indicating membrane damage (SYTO9, propidium iodide) or esterase activity (carboxyfluorescein diacetate). TEM clearly demonstrated variability in morphological changes of bacteria suggesting different mechanisms of damage. Viability stains supported these findings with faster declining viable cell populations in 85% glycerol at 36 degrees C compared with 4 degrees C. Both methods demonstrated that Gram-negative species were more susceptible than Gram-positive species. In conclusion, 85% glycerol may have some additional antimicrobial effect. Temperature is an important factor herein and Gram-negatives are most susceptible. The latter finding probably reflects the difference in cell wall composition between Gram-positive and Gram-negative bacteria.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1431-9276
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
18-29
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Flow cytometric viability assessment and transmission electron microscopic morphological study of bacteria in glycerol.
pubmed:affiliation
Department of Microbiology, University Hospitals Leuven, Leuven, B-3000, Belgium.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't