Skin bacteria after chlorhexidine exposure-is there a difference in response to human beta-Defensin-3?
| Autor: | Günter Kampf, Anke Heisig, Peter Heisig, Mirja Reichel |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Microbiology (medical)
beta-Defensins Staphylococcus Microbial Sensitivity Tests Bacterial growth medicine.disease_cause Microbiology Anti-Infective Agents medicine Humans Defensin Log10 reduction Skin Microbial Viability biology Strain (chemistry) Chlorhexidine General Medicine biology.organism_classification In vitro Infectious Diseases Staphylococcal Skin Infections Bacteria medicine.drug |
| Zdroj: | European journal of clinical microbiologyinfectious diseases : official publication of the European Society of Clinical Microbiology. 29(6) |
| ISSN: | 1435-4373 |
| Popis: | We investigated whether exposure to sub-lethal concentrations of chlorhexidine digluconate (CHG) changed the response of five Staphylococcus spp. to human beta-Defensin-3 (hBD-3). The change in response for each strain was determined in vitro with time-kill experiments in suspension by comparing the mean log(10) reduction caused by hBD-3 at 1.5 and 3 h in exposed and non-exposed bacteria. The identity of staphylococcal species was verified by DNA sequence homology in the gyrA genes in comparison with reference strains. Baseline sub-lethal concentrations allowing visible bacterial growth were between 0.0625 and 0.25 microg/ml. Sub-lethal CHG concentrations increased within 3 days in two isolates. For S. capitis 19/2, CHG-exposed cells were less susceptible to 0.5 microg/ml hBD-3 (log(10) reduction 0.78 versus 2.06 at 1.5 h; p0.001; t-test). For S. aureus, however, CHG-exposed cells were more susceptible to 1 microg/ml hBD-3. The observed changes between CHG-exposed and non-exposed cells did not indicate a general trend in response to hBD-3. Overall, we found no consistent evidence that 3 days of exposure to CHG changed the response of five Staphylococcus spp. to hBD-3. The use of CHG for skin antisepsis is, based on our data, unlikely to change the natural defence activity of hBD-3. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink