scholarly journals 110. MRSA nasal swab as a stewardship tool to guide IV Vancomycin in diabetic foot infections

2021 ◽  
Vol 8 (Supplement_1) ◽  
pp. S169-S170
Author(s):  
Alex Lazo-Vasquez ◽  
Michael Piazza ◽  
Leopoldo Cordova ◽  
Lauren Bjork ◽  
Rolando A Zamora Gonzalez ◽  
...  

Abstract Background The Infectious Disease Society of America (IDSA) guidelines suggest empiric Methicillin-Resistant Staphylococcus Aureus (MRSA) coverage for Diabetic Foot Infection (DFI) with a history of MRSA infection, if local prevalence is high, or if the infection is severe. However, data suggests that there is overutilization of vancomycin in this population and this medication is associated with toxicity. MRSA nasal screen has a high negative predictive value (NPV) for ruling out MRSA in pneumonia and other sites. We performed a medication utilization evaluation (MUE) for Vancomycin IV in DFI patients who had an MRSA nares screen to determine our own NPV of this test and feasibility to use it as an antibiotic stewardship program (ASP) tool to guide vancomycin use in this population. Methods We retrospectively reviewed 224 patients from January 2015 to January 2020 who had a diagnosis of DFI and an MRSA nasal screen. 139 patients had cultures done. For the NPV, we excluded patients who had any MRSA positive culture or screen up to a year from admission (Figure 1). Figure 1. Flowchart from our medication utilization evaluation showing patient’s distribution by MRSA-screen result Results We found 148 (66%) patients with DFI who had received IV vancomycin empirically during the admission and 196 of them were MRSA-nares negative (Figure 2). The average days of therapy (DOT) in the MRSA-nares negative patients was 5.2 days vs 4.8 in the MRSA-nares positive patients. Out of the 139 patients with a negative MRSA nasal swab, 124 had no MRSA in cultures, yielding an NPV of 89%. If we considered only the deep cultures, the NPV increased to 90%. Figure 2. Number of patients who received IV vancomycin grouped by MRSA-screen result Conclusion We identified overutilization of IV vancomycin in patients with a diagnosis of DFI in our institution. Also, our NPV of the MRSA-nasal screening to rule out MRSA infection in DFI was high at 89% similar to previous studies. Based on these findings, we plan to implement a local ASP protocol (Figure 3) using MRSA nasal swab screen to decrease the empiric use of vancomycin. The results of these efforts will be analyzed and published in future iterations with the hopes to share this knowledge to reduce the use of IV vancomycin in this population in other centers. Figure 3. Protocol draft to be used as an ASP tool to guide IV vancomycin de-escalation based on MRSA-nasal screen for DFI patients Disclosures All Authors: No reported disclosures

Author(s):  
Clare Kelleher

Diabetic foot infections (DFI) are diagnosed by two or more classic findings of inflammation (redness, swelling, warmth, and tenderness) or purulent drainage within an existing diabetic foot wound. Wounds without clinical evidence of soft tissue or bone infection often do not require antibiotic therapy. When infection is present, empiric antibiotic regimens must be based on the available clinical and local epidemiologic data, but definitive therapy should be based on cultures of infected tissues or clinical response. Consideration of methicillin-resistant Staphylococcus aureus (MRSA) coverage should be given when local prevalence is high, in patients with a prior history of MRSA infection, or when the systemic manifestations are severe. Surgical intervention and vascular assessment play key roles in the management of many DFI; deep DFI require incision, drainage, and debridement. Redistribution of pressure off of the wound is a tenet in the management of DFI.


Author(s):  
Jacquelyn Brondo ◽  
Kathleen Morneau ◽  
Teri Hopkins ◽  
Linda Yang ◽  
Jose Cadena-Zuluaga ◽  
...  

Infectious Diseases Society of America diabetic foot infection (DFI) guidelines indicate empiric methicillin-resistant Staphylococcus aureus (MRSA) coverage for patients with a history of MRSA infection, when local prevalence of MRSA is high, or infection is clinically severe. These recommendations may lead to overutilization of empiric MRSA coverage, which can result in serious consequences. A strong negative predictive value (NPV) has been reported in literature for pneumonia, and recently, for all anatomical sites of infection. While these findings are promising, further validation is needed before clinicians may confidently use MRSA nares to guide empiric therapy for DFIs. A retrospective electronic medical record review was completed between October 1, 2013 and October 1, 2019. Patients met inclusion criteria if they were at least 18, admitted with a DFI, had MRSA nares test results, and DFI cultures. Patients were excluded if pregnant or MRSA infection within 1 year prior to index admission for DFI. A total of 200 patients met inclusion criteria. The majority of study participants were male with a mean age of 63. NPV of MRSA nares for MRSA DFIs was determined to be 94% and positive predictive value 58%. Sensitivity and specificity were 56% and 94%, respectively. Results of this study are consistent with prior literature supporting strong correlation of NPV for MRSA nares. The DFIs evaluated suggest a strong NPV of MRSA nares for MRSA DFIs, which may allow for faster de-escalation of empiric anti-MRSA antibiotic therapy and lower risk of adverse events associated with anti-MRSA therapy.


Author(s):  
DÊNISSON GUEDES PONTES ◽  
IVAN TRAMUJAS DA COSTA E SILVA ◽  
JESSICA JANSEN FERNANDES ◽  
AMANDA DE FÁTIMA GURGEL MONTEIRO ◽  
PEDRO HENRIQUE DA SILVA GOMES ◽  
...  

ABSTRACT Purpose: the purpose of this research was to identify the sociodemographic and microbiological characteristics and antibiotic resistance rates of patients with diabetic foot infections, hospitalized in an emergency reference center. Methods: it was an observational and transversal study. The sociodemographic data were collected by direct interview with the patients. During the surgical procedures, specimens of tissue of the infected foot lesions were biopsied to be cultured, and for bacterial resistance analysis. Results: the sample consisted of 105 patients. The majority of patierns were men, over 50 years of age, married and with low educational level. There was bacterial growth in 95 of the 105 tissue cultures. In each positive culture only one germ was isolated. There was a high prevalence of germs of the Enterobacteriaceae family (51,5%). Gram-negative germs were isolated in 60% of cultures and the most individually isolated germs were the Gram-positive cocci, Staphylococcus aureus (20%) and Enterococcus faecalis (17,9%). Regarding antibiotic resistance rates, a high frequency of Staphylococcus aureus resistant to methicillin (63,0%) and to ciprofloxacin (55,5%) was found; additionally, 43,5% of the Gram-negative isolated germs were resistant to ciprofloxacin. Conclusions: the majority of patients were men, over 50 years of age, married and with low educational level. The most prevalent isolated germs from the infected foot lesions were Gram-negative bacteria, resistant to ciprofloxacin, and the individually most isolated germ was the methicillin resistant Staphylococcus aureus.


2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Joehaimey J ◽  
Mohamad Adam B ◽  
M Anwar Hau A ◽  
Kamil MK ◽  
SP Jaya Purany ◽  
...  

Introduction: The aim of this study is to determine the most common organisms isolated in diabetic foot infection and the most utilised antibiotic regimes as the first line of treatment. Methods: This is a retrospective record review of the National Orthopaedic Registry Malaysia among diabetes mellitus type 2 patients who had foot infections. All identified cases admitted to 18 government hospitals in Malaysia from the 1st January 2008 until the 31st December, 2009 were included in the study. Results: A total of 416 patients were included in the study. The most common organisms cultured were Proteus species (17.5%), Klebsiella species (17.1%) and Staphylococcus aureus (17.9%), while the most commonly used antibiotic was ampicillin/sulbactam (67.5%). None of the patients was appropriately treated with metronidazole, cefoperazone or fucidic acid. All patients were given appropriate antibiotics to treat Serratia infection. Conclusion: Significant number of patients with diabetic foot infections were not treated using appropriate antibiotics as the first line treatment.


2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S724-S724
Author(s):  
Courtney Pearson ◽  
Katherine Lusardi ◽  
Kelsey McCain ◽  
Jacob Painter ◽  
Mrinmayee Lakkad ◽  
...  

Abstract Background Accelerate Pheno™ blood culture detection system (AXDX) provides identification (ID) and antimicrobial susceptibility testing (AST) within 8 hours of growth in blood culture. We previously reported length of stay (LOS), time to optimal therapy (TTOT), and antibiotic days of therapy (DOT) decrease following AXDX implementation alongside an active antimicrobial stewardship program (ASP). It is unclear whether real-time notification (RTN) of results further improves these variables. Methods A single-center, quasi-experimental before/after study of adult bacteremic inpatients was performed after implementation of AXDX. A 2017 historical cohort was compared with two 2018 intervention cohorts. Intervention-1: AXDX performed 24/7 with results reviewed by providers or ASP as part of their normal workflow. Intervention 2: AXDX performed 24/7 with RTN to ASP 7 days per week 9a-5p and overnight results called to ASP at 9a. Interventions 1 and 2 were utilized on an alternating weekly basis during the study (February 2018–September 2018). Historical ID/AST were performed using VITEK® MS and VITEK®2. Exclusion criteria included polymicrobial or off-panel isolates, prior positive culture, and patients not admitted at the time of AST. Clinical outcomes were compared with Wilcoxon rank-sum and χ 2 analysis. Results 540 (83%) of 650 positive cultures performed on AXDX had on-panel organisms. 308 (57%) of these cultures and 188 (77%) of 244 reviewed historical cultures met inclusion criteria. Baseline illness severity and identified pathogens were similar between cohorts. Clinical outcomes and antimicrobial DOT are reported in Tables 1 and 2. Conclusion Following our implementation of AXDX, clinical outcomes including LOS, TTOT, total DOT, BGN DOT, and frequency of achieving optimal therapy were significantly improved compared with a historical cohort. Addition of RTN for AXDX results in the setting of an already active ASP did not further improve these metrics. However, compared with historical arm, AXDX with RTN did significantly impact specific subsets of antibiotic use while AXDX alone did not. This may be due to earlier vancomycin de-escalation. These results support the benefit of integration of AXDX into healthcare systems with an active ASP even without the resources to include real-time notification. Disclosures All authors: No reported disclosures.


Author(s):  
Catherine Li ◽  
Nicholas J. Mercuro ◽  
Ryan W. Chapin ◽  
Howard S. Gold ◽  
Christopher McCoy

In 2018, the United States Food and Drug Administration (FDA) issued a Drug Safety Communication regarding fluoroquinolone-associated aortic aneurysm. This quasi-experimental study assessed antibiotic prescribing for 198 hospitalized patients with diabetic foot infection. Following the warning, median inpatient fluoroquinolone days of therapy (DOT) decreased from 3 to 0 days ( P < 0.001), corresponding with increased beta-lactam DOT and OPAT enrollment. FDA communications may influence antibiotic selection and transitions of care, representing opportunities for antimicrobial stewardship.


2017 ◽  
Vol 68 (7) ◽  
pp. 1648-1651
Author(s):  
Bogdan Mihnea Ciuntu ◽  
Ciprian Vasiluta ◽  
Robert Negru ◽  
Roxana Hultoana ◽  
Roxana Ciuntu ◽  
...  

The study aims to assess the significance of negative pressure therapy in the treatment of diabetic foot.The objectives intend to evaluate the healing time required after applying the method and the functional consequences for the patient. A prospective study was conducted on a sample of 37 patients with diabetic foot were monitored their clinical course between September 2014 - April 2017, following negative pressure therapy. There were used vacuum assisted closure devices (VAC � -Hartman) in order to apply negative pressure to the wound, while complying with specified settings (negative pressure, time of use of a kit) in accordance with patients� outcome.There were monitored changes in wound size (planimetric and volumetric measurement), their bacterial load and duration of treatment. Healing was obtained in all cases, to an average hospital stay of 27.3 days and 8 days of therapy application.The negative result of microbial cultures was obtained after an average of 6.45 days by simultaneous application of negative pressure and antibiotic treatment according to the antibiogram. Skin grafts were necessary to close the defect in 4 cases. After basic treatment of the wound, auxiliary methods such as negative pressure contribute to the healing.In patients with diabetic foot who were required surgical intervention, the use of negative pressure therapy yielded a significant benefit in the preservation of the affected limb, after minimal excision.The results we obtained throughout our experience recommend use of NPTW technique as indication for abdominal wall surgery in closing abdominal wall defects, compartment syndrome and surgical site infection after prosthetic mesh.


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