29 May 2009
Energy-dependent stimulatory and inhibitory effects of extracorporeal shock waves on bacteria and on gentamicin activityCarsten HornABCDEF, Ludger GerdesmeyerADEG, Christof von EiffCDEF, Reiner GradingerDEG, Hans GollwitzerABCDEFG
Med Sci Monit 2009; 15(6): MT77-83 :: ID: 869664
Local infection is considered a contraindication for extracorporeal shock wave (ESW) application, although the antibacterial effects of ESW have been clearly demonstrated in vitro. This study aimed to assess the effects of ESW on bacteria under growth-promoting conditions and to evaluate interactions with the activity of gentamicin.
Material and Method
Standardized suspensions of Staphylococcus aureus were exposed to 4000 shock wave impulses of various energy flux densities (EFD) both at 37 degrees C in growth medium and at 20 degrees C in saline. Bacterial viability of treatment groups and controls were quantified. Furthermore, the MICs of gentamicin against ESW-treated and untreated suspensions of S. aureus were compared. Finally, suspensions of S. aureus containing graded concentrations of gentamicin were exposed to ESW and bacterial growth was assessed.
Antibacterial effects of ESW (0.59-0.96 mJ/mm2) were confirmed with bacteria suspended in normal saline (20 degrees C, p<0.05). However, bacteria suspended in growth medium at 37 degrees C demonstrated significantly increased proliferation (p=0.009) after treatment with shock waves of lower EFD (0.59 mJ/mm2). At higher EFD a significant reduction of bacteria was observed (p=0.009). The MIC of gentamicin against S. aureus was not altered by ESW application. Furthermore, the combination of gentamicin and ESW did not alter gentamicin activity (p>0.05). Nevertheless, a growth-promoting effect of ESW at 0.59 mJ/mm(2) was demonstrated despite simultaneous administration of gentamicin.
This is the first study reporting energy-dependent stimulation of bacterial growth by ESW. Also important is that ESW did not alter the activity of gentamicin.
Keywords: Time Factors, Staphylococcus aureus - radiation effects, Pressure, High-Energy Shock Waves, Gentamicins - pharmacology
01 March 2023 : EditorialEditorial: Global Surveillance of Highly Pathogenic Avian Influenza Viruses in Poultry, Wild Birds, and Mammals to Prevent a Human Influenza Pandemic
Med Sci Monit 2023; 29:e939968
03 March 2023 : Database AnalysisReinfections from SARS-CoV-2: A Retrospective Study from the Gyncentrum Genetic Laboratory in Sosnowiec, Po...
Med Sci Monit In Press; DOI: 10.12659/MSM.939452
09 February 2023 : Clinical ResearchEvaluation of Health-Related Quality of Life and Mental Health in 729 Medical Students in Indonesia During ...
Med Sci Monit 2023; 29:e938892
19 January 2023 : Clinical ResearchDetermining the Impact of the COVID-19 Pandemic on Dental Care in the Serbian Adult Population: An Online Q...
Med Sci Monit 2023; 29:e939238
27 December 2022 : Clinical ResearchEffect of Physiotherapy to Correct Rounded Shoulder Posture in 30 Patients During the COVID-19 Pandemic in ...
Med Sci Monit 2022; 28:e938926
19 Mar 2023 : Clinical ResearchManagement of Unstable C1 Fractures Involving the Lateral Mass: Posterior C1-C2 Screw-Rod Fixation and Fusion
Med Sci Monit In Press; DOI: 10.12659/MSM.938600
17 Mar 2023 : Clinical ResearchRelationship Between Autonomic Nervous System Activity and Axial Length in Children
Med Sci Monit In Press; DOI: 10.12659/MSM.939451
15 Mar 2023 : Clinical ResearchRelationship Between Psychological Symptoms and Self-Esteem Levels Before and After Stomach Botox Treatment
Med Sci Monit In Press; DOI: 10.12659/MSM.939618
15 Mar 2023 : Clinical ResearchShort-Term Patient Outcomes Using the Interlaminar Endoscopic Surgical System Ilessys® Delta System versus ...
Med Sci Monit In Press; DOI: 10.12659/MSM.938477
Most Viewed Current Articles
13 Nov 2021 : Clinical ResearchAcceptance of COVID-19 Vaccination and Its Associated Factors Among Cancer Patients Attending the Oncology ...
Med Sci Monit 2021; 27:e932788
30 Dec 2021 : Clinical ResearchRetrospective Study of Outcomes and Hospitalization Rates of Patients in Italy with a Confirmed Diagnosis o...
Med Sci Monit 2021; 27:e935379
08 Mar 2022 : Review articleA Review of the Potential Roles of Antioxidant and Anti-Inflammatory Pharmacological Approaches for the Man...
Med Sci Monit 2022; 28:e936292
01 Jan 2022 : EditorialEditorial: Current Status of Oral Antiviral Drug Treatments for SARS-CoV-2 Infection in Non-Hospitalized Pa...
Med Sci Monit 2022; 28:e935952