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biofilm in surgical site infections

Kashif Rahim, Shamim Saleha, Xudong Zhu, Liang Huo, Abdul Basit, Octavio Luiz Franco
A wound is damage of a tissue usually caused by laceration of a membrane, generally the skin. Wound healing is accomplished in three stages in healthy individuals, including inflammatory, proliferative, and remodeling stages. Healing of wounds normally starts from the inflammatory phase and ends up in the remodeling phase, but chronic wounds remain in an inflammatory stage and do not show progression due to some specific reasons. Chronic wounds are classified in different categories, such as diabetic foot ulcer (DFU), venous leg ulcers (VLU) and pressure ulcer (PU), surgical site infection (SSI), abscess, or trauma ulcers...
October 14, 2016: Microbial Ecology
Damien Keogh, Wei Hong Tay, Yao Yong Ho, Jennifer L Dale, Siyi Chen, Shivshankar Umashankar, Rohan B H Williams, Swaine L Chen, Gary M Dunny, Kimberly A Kline
Enterococcus faecalis is frequently associated with polymicrobial infections of the urinary tract, indwelling catheters, and surgical wound sites. E. faecalis co-exists with Escherichia coli and other pathogens in wound infections, but mechanisms that govern polymicrobial colonization and pathogenesis are poorly defined. During infection, bacteria must overcome multiple host defenses, including nutrient iron limitation, to persist and cause disease. In this study, we investigated the contribution of E. faecalis to mixed-species infection when iron availability is restricted...
October 12, 2016: Cell Host & Microbe
Cornelius J Clancy, Camille Meslin, Hassan Badrane, Shaoji Cheng, Liliana C Losada, William C Nierman, Pascalis Vergidis, Nathan L Clark, M Hong Nguyen
We used ribonucleic acid sequencing to profile Candida albicans transcription within biliary fluid from a patient with cholangitis; samples were collected before and after treatment with fluconazole and drainage. Candida albicans transcriptomes at the infection site distinguished treated from untreated cholangitis. After treatment, 1131 C. albicans genes were differentially expressed in biliary fluid. Up-regulated genes were enriched in hyphal growth, cell wall organization, adhesion, oxidation reduction, biofilm, and fatty acid and ergosterol biosynthesis...
September 2016: Open Forum Infectious Diseases
Jiri Skrivan, Pavel Drevinek
CLINICAL PRESENTATION: Case history of a paediatric patient with a cochlear implant and a surgical site infection that developed as a result of acute otitis media is presented. INTERVENTION: After conservative management including wound debridement it was decided to explant a functioning device. OBJECTIVE AND IMPORTANCE: In a number of cases, it is necessary to remove the infected albeit functioning device, especially in the event of formation of the biofilm has occurred...
September 2016: Cochlear Implants International
George M Viola, Jesse C Selber, Melissa Crosby, Issam I Raad, Charles E Butler, Mark T Villa, Steven J Kronowitz, Mark W Clemens, Patrick Garvey, Wei Yang, Donald P Baumann
BACKGROUND: Infections of breast tissue expander (TE) are complex, often requiring TE removal and hospitalization, which can delay further adjuvant therapy and add to the overall costs of breast reconstruction. Therefore, to reduce the rate of TE removal, hospitalization, and costs, we created a standardized same-day multidisciplinary outpatient quality improvement protocol for diagnosing and treating patients with early signs of TE infection. METHODS: We prospectively evaluated 26 consecutive patients who developed a surgical site infection between February 2013 and April 2014...
June 2016: Plastic and Reconstructive Surgery. Global Open
Ghada I Barakat, Yasmin M Nabil
The aim of this study was to detect mupirocin-resistant isolates from pus/wound swabs taken postoperatively in a tertiary centre in Egypt and to determine their ability to form biofilm in order to establish its correlation with mupirocin resistance. This was a prospective study including 513pus/wound swabs from patients suffering from postoperative surgical site infections over the period July 2013-January 2015. Samples were cultured and isolates were identified by coagulase activity, DNase test, mannitol fermentation by mannitol salt agar followed by API Staph 32...
March 2016: Journal of Global Antimicrobial Resistance
L M König, R Klopfleisch, D Höper, A D Gruber
The composition of biofilms in chronic wound infections of dogs is unclear. In the present study, histologically identified biofilms attached to sutures in chronically infected wounds of three dogs were examined by next generation sequencing of total DNA extracted from formalin-fixed and paraffin-embedded tissue samples. The analysis identified an inhomogeneous bacterial composition in three tissues containing biofilms. Some of the identified bacterial families such as Staphylococci and Streptococci have been found before in biofilms associated with human and canine wounds but in this study were quantitatively in the minority...
2014: International Scholarly Research Notices
C Mauffrey, B Herbert, H Young, M L Wilson, M Hake, P F Stahel
The development of post-traumatic infection is potentially a limb threatening condition. The orthopaedic trauma literature lags behind the research performed by our arthroplasty colleagues on the topic of implant-related infections. Surgical site infections in the setting of a recent ORIF are notoriously hard to eradicate due to biofilm formation around the implant. This bacteria-friendly, dynamic, living pluri-organism structure has the ability to morph and adapt to virtually any environment with the aim to maintain the causative organism alive...
August 2016: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
Alexandra E Paharik, Alexander R Horswill
The staphylococci comprise a diverse genus of Gram-positive, nonmotile commensal organisms that inhabit the skin and mucous membranes of humans and other mammals. In general, staphylococci are benign members of the natural flora, but many species have the capacity to be opportunistic pathogens, mainly infecting individuals who have medical device implants or are otherwise immunocompromised. Staphylococcus aureus and Staphylococcus epidermidis are major sources of hospital-acquired infections and are the most common causes of surgical site infections and medical device-associated bloodstream infections...
April 2016: Microbiology Spectrum
Claudia Flores, Stephanie Degoutin, Feng Chai, Gwenael Raoul, Jean-Chritophe Hornez, Bernard Martel, Juergen Siepmann, Joel Ferri, Nicolas Blanchemain
Trauma and orthopedic surgery can cause infections as any open surgical procedures. Such complications occur in only1 to 5% of the cases, but the treatment is rather complicated due to bacterial biofilm formation and limited drug access to the site of infection upon systemic administration. An interesting strategy to overcome this type of complications is to prevent bacterial proliferation and biofilm formation via the local and controlled release of antibiotic drugs from the implant itself. Obviously, the incorporation of the drug into the implant should not affect the latter's biological and mechanical properties...
July 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
Kimia Seifi, Hossein Kazemian, Hamid Heidari, Fereshteh Rezagholizadeh, Yasaman Saee, Fariba Shirvani, Hamidreza Houri
BACKGROUND: Klebsiella pneumoniae is among the most frequently recovered etiologic agents from nosocomial infections. This opportunistic pathogen can generate a thick layer of biofilm as one of its important virulence factors, enabling the bacteria to attach to living or abiotic surfaces, which contributes to drug resistance. OBJECTIVES: The resistance of biofilm-mediated infections to effective chemotherapy has adverse effects on patient outcomes and survival. Therefore, the aim of the present study was to evaluate the biofilm-formation capacity of clinical K...
January 2016: Jundishapur Journal of Microbiology
Suzana Meira Ribeiro, Marlon Henrique Cardoso, Elizabete de Souza Cândido, Octávio Luiz Franco
The ability of pathogenic bacteria to aggregate and form biofilm represents a great problem for public health, since they present extracellular components that encase these micro-organisms, making them more resistant to antibiotics and host immune attack. This may become worse when antibiotic-resistant bacterial strains form biofilms. However, antibiofilm screens with different compounds may reveal potential therapies to prevent/treat biofilm infections. Here, we focused on Klebsiella pneumoniae, an opportunistic bacterium that causes different types of infections, including in the bloodstream, meninges, lungs, urinary system and at surgical sites...
2016: Future Microbiology
Shauna Morrison, Ameet Singh, Joyce Rousseau, J Scott Weese
OBJECTIVE: To evaluate adherence of methicillin-resistant Staphylococcus pseudintermedius (MRSP) to 5 suture materials commonly used in small animal surgery. SAMPLE: 10 epidemiologically unrelated MRSP isolates (obtained from dogs with clinical infections) that had strong biofilm-forming ability and 5 types of suture. PROCEDURES: The 5 types of suture evaluated were monofilament polyglecaprone 25, monofilament polydioxanone, triclosan-coated (TC)-monofilament polydioxanone, braided polyglactin 910, and barbed monofilament polydioxanone...
February 2016: American Journal of Veterinary Research
Rebecca A Garcia, David J Tennent, David Chang, Joseph C Wenke, Carlos J Sanchez
Antibiotic-loaded bone cements, including poly(methyl methacrylate) (PMMA) and calcium sulfate (CaSO4), are often used for treatment of orthopaedic infections involving Staphylococcus spp., although the effectiveness of this treatment modality may be limited due to the emergence of antimicrobial resistance and/or the development of biofilms within surgical sites. Gallium(III) is an iron analog capable of inhibiting essential iron-dependent pathways, exerting broad antimicrobial activity against multiple microorganisms, including Staphylococcus spp...
2016: BioMed Research International
Derya Burcu Hazer, Mustafa Sakar, Yelda Dere, Gülşen Altinkanat, M Ibrahim Ziyal, Baki Hazer
STUDY DESIGN: Antimicrobial effect of a novel silver-impregnated pedicle screw in rabbits. OBJECTIVE: A novel spine implant model was designed to study the antimicrobial effect of a modified Titanium (Ti) pedicle screws with methicillin-resistant Staphylococcus aureus (MRSA) in multiple surgical sites in the lumbar spine of a rabbit. SUMMARY OF BACKGROUND DATA: Infection in spinal implant is of great concern. Anti-infection strategies must be tested in relevant animal models that will lead to appropriate clinical studies...
March 2016: Spine
J A Inzana, R P Trombetta, E M Schwarz, S L Kates, H A Awad
Surgical implant-associated bone infections (osteomyelitis) have severe clinical and socioeconomic consequences. Treatment of chronic bone infections often involves antibiotics given systemically and locally to the affected site in poly (methyl methacrylate) (PMMA) bone cement. Given the high antibiotic concentrations required to affect bacteria in biofilm, local delivery is important to achieve high doses at the infection site. PMMA is not suitable to locally-deliver some biofilm-specific antibiotics, including rifampin, due to interference with PMMA polymerisation...
November 4, 2015: European Cells & Materials
Onyinye Diribe, Sarah Thomas, Manal AbuOun, Noel Fitzpatrick, Roberto La Ragione
Staphylococcus pseudintermedius is a commensal organism of dogs that can also be implicated in surgical site infections (SSIs) in dogs. Particularly with the recent emergence and spread of the ST71-t02-SCCmecII-III multidrug-resistant S. pseudintermedius clonal lineage (MDRSP), it is important to understand the clonal diversity of S. pseudintermedius in SSIs in dogs. The study reported here investigated the genotypic relatedness of 124 S. pseudintermedius isolates from the surgical wounds of 90 dogs admitted to a referral practice in the UK...
September 2015: Journal of Medical Microbiology
Carlo Luca Romanò, Sara Scarponi, Enrico Gallazzi, Delia Romanò, Lorenzo Drago
Implanted biomaterials play a key role in current success of orthopedic and trauma surgery. However, implant-related infections remain among the leading reasons for failure with high economical and social associated costs. According to the current knowledge, probably the most critical pathogenic event in the development of implant-related infection is biofilm formation, which starts immediately after bacterial adhesion on an implant and effectively protects the microorganisms from the immune system and systemic antibiotics...
2015: Journal of Orthopaedic Surgery and Research
Vivek Borse, Vaishali Pawar, Gautam Shetty, Arun Mullaji, Rohit Srivastava
Implants are an inevitable part of orthopaedic surgery. However, implant associated infection remains a major challenge for orthopaedic surgeons and researchers. This review focuses on current options available for prevention of implant associated infection, their drawbacks and future promising applications of nanotechnology-based approaches. Nanobiotechnology has shown remarkable progress in recent years especially in biomaterials, diagnostics, and drug delivery system. Although several applications of nanobiotechnology in orthopaedics have been described, few have elaborated their role in the prevention of implant related infection in orthopaedics...
2016: Current Drug Delivery
Eva Rüegg, Alexandre Cheretakis, Ali Modarressi, Stephan Harbarth, Brigitte Pittet-Cuénod
Introduction. Medical tourism for aesthetic surgery is popular. Nontuberculous mycobacteria (NTM) occasionally cause surgical-site infections. As NTM grow in biofilms, implantations of foreign bodies are at risk. Due to late manifestation, infections occur when patients are back home, where they must be managed properly. Case Report. A 39-year-old healthy female was referred for acute infection of the right gluteal area. Five months before, she had breast implants replacement, abdominal liposuction, and gluteal lipofilling in Mexico...
2015: Case Reports in Infectious Diseases
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