scholarly journals Sensitivity of Staphylococcal Biofilm to Selected Compounds of Plant Origin

Antibiotics ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 607
Author(s):  
Denis Swolana ◽  
Małgorzata Kępa ◽  
Agata Kabała-Dzik ◽  
Radosław Dzik ◽  
Robert D. Wojtyczka
Keyword(s):  
Antimicrobial Therapy ◽  
Staphylococcus Epidermidis ◽  
Bacterial Resistance ◽  
Chemotherapeutic Agents ◽  
Hospital Infections ◽  
Plant Origin ◽  
Appropriate Use ◽  
Coagulase Negative Staphylococci ◽  
Important Direction ◽  
Human Digestive Tract

Staphylococcus epidermidis is a bacterium that belongs to the human microbiota. It is most plentiful on the skin, in the respiratory system, and in the human digestive tract. Moreover, it is the most frequently isolated microorganism belonging to the group of Coagulase Negative Staphylococci (CoNS). In recent years, it has been recognized as an important etiological factor of mainly nosocomial infections and infections related to the cardiovascular system. On the other hand, Staphylococcus aureus, responsible for in-hospital and out-of-hospital infections, is posing an increasing problem for clinicians due to its growing resistance to antibiotics. Biofilm produced by both of these staphylococcal species in the course of infection significantly impedes therapy. The ability to produce biofilm hinders the activity of chemotherapeutic agents—the only currently available antimicrobial therapy. This also causes the observed significant increase in bacterial resistance. For this reason, we are constantly looking for new substances that can neutralize microbial cells. In the present review, 58 substances of plant origin with antimicrobial activity against staphylococcal biofilm were replaced. Variable antimicrobial efficacy of the substances was demonstrated, depending on the age of the biofilm. An increase in the activity of the compounds occurred in proportion to increasing their concentration. Appropriate use of the potential of plant-derived compounds as an alternative to antibiotics may represent an important direction of change in the support of antimicrobial therapy.

scholarly journals Prevalence of Antimicrobial-Resistant Pathogens in Canadian Hospitals: Results of the Canadian Ward Surveillance Study (CANWARD 2008)

2010 ◽  
Vol 54 (11) ◽  
pp. 4684-4693 ◽  
Author(s):  
George G. Zhanel ◽  
Melanie DeCorby ◽  
Heather Adam ◽  
Michael R. Mulvey ◽  
Melissa McCracken ◽  
...  
Keyword(s):  
Staphylococcus Epidermidis ◽  
Susceptibility Testing ◽  
Multidrug Resistant ◽  
Surveillance Study ◽  
Bacterial Isolates ◽  
Coagulase Negative Staphylococci ◽  
Clinical Specimens ◽  
E Coli ◽  
Polymyxin E ◽  
Resistance Rates

ABSTRACT A total of 5,282 bacterial isolates obtained between 1 January and 31 December 31 2008, inclusive, from patients in 10 hospitals across Canada as part of the Canadian Ward Surveillance Study (CANWARD 2008) underwent susceptibility testing. The 10 most common organisms, representing 78.8% of all clinical specimens, were as follows: Escherichia coli (21.4%), methicillin-susceptible Staphylococcus aureus (MSSA; 13.9%), Streptococcus pneumoniae (10.3%), Pseudomonas aeruginosa (7.1%), Klebsiella pneumoniae (6.0%), coagulase-negative staphylococci/Staphylococcus epidermidis (5.4%), methicillin-resistant S. aureus (MRSA; 5.1%), Haemophilus influenzae (4.1%), Enterococcus spp. (3.3%), Enterobacter cloacae (2.2%). MRSA comprised 27.0% (272/1,007) of all S. aureus isolates (genotypically, 68.8% of MRSA were health care associated [HA-MRSA] and 27.6% were community associated [CA-MRSA]). Extended-spectrum β-lactamase (ESBL)-producing E. coli occurred in 4.9% of E. coli isolates. The CTX-M type was the predominant ESBL, with CTX-M-15 the most prevalent genotype. MRSA demonstrated no resistance to ceftobiprole, daptomycin, linezolid, telavancin, tigecycline, or vancomycin (0.4% intermediate intermediate resistance). E. coli demonstrated no resistance to ertapenem, meropenem, or tigecycline. Resistance rates with P. aeruginosa were as follows: colistin (polymyxin E), 0.8%; amikacin, 3.5%; cefepime, 7.2%; gentamicin, 12.3%; fluoroquinolones, 19.0 to 24.1%; meropenem, 5.6%; piperacillin-tazobactam, 8.0%. A multidrug-resistant (MDR) phenotype occurred frequently in P. aeruginosa (5.9%) but uncommonly in E. coli (1.2%) and K. pneumoniae (0.9%). In conclusion, E. coli, S. aureus (MSSA and MRSA), P. aeruginosa, S. pneumoniae, K. pneumoniae, H. influenzae, and Enterococcus spp. are the most common isolates recovered from clinical specimens in Canadian hospitals. The prevalence of MRSA was 27.0% (of which genotypically 27.6% were CA-MRSA), while ESBL-producing E. coli occurred in 4.9% of isolates. An MDR phenotype was common in P. aeruginosa.

scholarly journals Molecular epidemiology of catheter-related bloodstream infections caused by coagulase-negative staphylococci in haematological patients with neutropenia

2004 ◽  
Vol 132 (5) ◽  
pp. 921-925 ◽  
Author(s):  
M. MÜLLER-PREMRU ◽  
P. ČERNELČ
Keyword(s):  
Blood Culture ◽  
Staphylococcus Epidermidis ◽  
Clinical Signs ◽  
Bloodstream Infections ◽  
Venous Catheter ◽  
Blood Cultures ◽  
Peripheral Vein ◽  
Central Venous ◽  
Coagulase Negative Staphylococci ◽  
Haematological Patients

Catheter-related bloodstream infection (CRBSI) caused by coagulase-negative staphylococci (CNS) is common in haematological patients with febrile neutropenia. As the clinical signs of CRBSI are usually scarce and it is difficult to differentiate from blood culture contamination, we tried to confirm CRBSI by molecular typing of CNS isolated from paired blood cultures (one from a peripheral vein and another from the central venous catheter hub). Blood cultures were positive in 59 (36%) out of 163 patients. CNS were isolated in 24 (40%) patients; in 14 from paired blood cultures (28 isolates) and in 10 from a single blood culture. CNS from paired blood cultures were identified as Staphylococcus epidermidis. Antimicrobial susceptibility was determined and bacteria were typed by pulsed-field gel electrophoresis (PFGE) of bacterial genomic DNA. In 13 patients, the antibiotic susceptibility of isolates was identical. The PFGE patterns from paired blood cultures were identical or closely related in 10 patients, thus confirming the presence of CRBSI. In the remaining four patients they were unrelated, and suggested a mixed infection or contamination. Since CNS isolates from three patients had identical PFGE patterns, they were probably nosocomially spread amongst them.

scholarly journals High-Dose Daptomycin Is Effective as an Antibiotic Lock Therapy in a Rabbit Model of Staphylococcus epidermidis Catheter-Related Infection

2017 ◽  
Vol 62 (2) ◽  
Author(s):  
Jana Basas ◽  
Marta Palau ◽  
Carlos Ratia ◽  
José L. del Pozo ◽  
María Teresa Martín-Gómez ◽  
...  
Keyword(s):  
Staphylococcus Epidermidis ◽  
Rabbit Model ◽  
Bloodstream Infections ◽  
High Dose ◽  
Coagulase Negative Staphylococci ◽  
Poor Patient ◽  
Lock Therapy ◽  
Antibiotic Lock ◽  
High Treatment

ABSTRACT Long-term catheter-related bloodstream infections (CRBSIs) involving coagulase-negative staphylococci are associated with poor patient outcomes, increased hospitalization, and high treatment costs. The use of vancomycin lock therapy has been an important step forward in treatment of these biofilms, although failures occur in 20% of patients. In this study, we report that a high dose of daptomycin lock therapy may offer a therapeutic advantage for these CRBSIs in just 24 h of treatment.

scholarly journals Pressure Ulcer-Related Pelvic Osteomyelitis: Evaluation of a Two-Stage Surgical Strategy (Debridement, Negative Pressure Therapy and Flap Coverage) with Prolonged Antimicrobial Therapy

2017 ◽  
Vol 4 (suppl_1) ◽  
pp. S99-S99
Author(s):  
Tristan Ferry ◽  
Fabien Boucher ◽  
Joseph Chateau ◽  
Hristo Shipkov ◽  
Fatiha Daoud ◽  
...  
Keyword(s):  
Pressure Ulcer ◽  
Antimicrobial Therapy ◽  
Negative Pressure ◽  
Total Duration ◽  
Surgical Strategy ◽  
Negative Pressure Therapy ◽  
Coagulase Negative Staphylococci ◽  
Two Stage ◽  
Pressure Therapy ◽  
Flap Coverage

Abstract Background A two-stage surgical strategy (debridement-negative pressure therapy (NPT) and flap coverage) with prolonged antimicrobial therapy is usually proposed in pressure ulcer-related pelvic osteomyelitis but has not been widely evaluated. Methods Adult patients with pressure ulcer-related pelvic osteomyelitis treated by a two-stage surgical strategy were included in a retrospective cohort study. Determinants of superinfection (i.e.,, additional microbiological findings at reconstruction) and treatment failure were assessed using binary logistic regression and Kaplan–Meier curve analysis. Results Sixty-four pressure ulcer-related pelvic osteomyelitis in 61 patients (age, 47 [IQR 36–63]) were included. Osteomyelitis was mostly plurimicrobial (73%), with a predominance of S. aureus (47%), Enterobacteriaceae (44%), and anaerobes (44%). Flap coverage was performed after 7 (IQR 5–10) weeks of NPT, with 43 (68%) positive bone samples among which 39 (91%) were superinfections, associated with a high ASA score (OR, 5.8; P = 0.022). An increased prevalence of coagulase negative Staphylococci (P = 0.017) and Candida (P = 0.003) was observed at time of flap coverage. An ESBL Enterobacteriaceae was found in one (12%) patients, associated with fluoroquinolone consumption (OR, 32.4; P = 0.005). Treatment duration was as 20 (IQR 14–27) weeks, including 11 (IQR 8–15) after reconstruction. After a follow-up of 54 (IQR 27–102) weeks, 15 (23%) failures were observed, associated with previous pressure ulcer (OR, 5.7; P = 0.025) and Actinomyces infection (OR, 9.5; P = 0.027). Conclusion Pressure ulcer-related pelvic osteomyelitis is a difficult-to-treat clinical condition, generating an important consumption of broad-spectrum antibiotics. Carbapenem should be reserved for ESBL at-risk patients only, including those with previous fluoroquinolone use. The uncorrelation between outcome and the debridement-to-reconstruction interval argue for a short sequence to limit the total duration of treatment. Disclosures T. Ferry, HERAEUS: Consultant, Speaker honorarium

The Problem of Bacterial Resistance in Antimicrobial Therapy of Tuberculosis

1955 ◽  
Vol 28 (3) ◽  
pp. 260-274 ◽  
Author(s):  
HENRY C. SWEANY ◽  
FRANK P. DUNBAR ◽  
ERIC WOOD
Keyword(s):  
Antimicrobial Therapy ◽  
Bacterial Resistance

Characterization of coagulase-negative staphylococci isolated from hospital indoor air and a comparative analysis between airborne and inpatient isolates of Staphylococcus epidermidis

2012 ◽  
Vol 61 (8) ◽  
pp. 1136-1145 ◽  
Author(s):  
Ana Maria Nunes Botelho ◽  
Zilma das Graça Nunes ◽  
Marise Dutra Asensi ◽  
Marisa Zenaide Ribeiro Gomes ◽  
Sérgio Eduardo Longo Fracalanzza ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Indoor Air ◽  
Staphylococcus Epidermidis ◽  
Coagulase Negative Staphylococci ◽  
Hospital Indoor Air
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