scholarly journals Predictors of Time to Effective and Optimal Antimicrobial Therapy in Patients With Positive Blood Cultures Identified via Molecular Rapid Diagnostic Testing

2018 ◽  
Vol 6 (1) ◽  
Author(s):  
Maya Beganovic ◽  
Tristan T Timbrook ◽  
Sarah M Wieczorkiewicz

Abstract Antimicrobial stewardship (AMS) programs integrated with rapid diagnostic tests optimize patient outcomes and reduce time to effective therapy (TTET) and time to optimal therapy (TTOT). This study identifies predictors of TTET and TTOT among patients with positive blood cultures and identifies limitations to current TTOT definitions and outcomes.

Author(s):  
Jeffrey A. Freiberg ◽  
Connor R. Deri ◽  
Whitney J. Nesbitt ◽  
Romney M. Humphries ◽  
George E. Nelson

Rapid diagnostic testing to identify bloodstream pathogens has arisen as an important tool both to ensure adequate antimicrobial therapy is given early and to aid in antimicrobial stewardship by allowing for more rapid deescalation of inappropriate antimicrobial therapy. However, there is a paucity of data regarding the significance of isolates that are not able to be identified by rapid diagnostic testing.


2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S722-S722
Author(s):  
Anndee Gritte ◽  
Teri Hopkins ◽  
Kathleen Morneau ◽  
Christopher R Frei ◽  
Jose Cadena-Zuluaga ◽  
...  

Abstract Background Rapid diagnostic testing (RDT) in microbiology labs shortens the time to identification of bacteria in blood cultures. This study evaluates the impact of implementation of Cepheid® GeneXpert® to detect methicillin-resistant Staphylococcus aureus and S. aureus in Gram-positive blood cultures. Methods Patients with positive blood cultures for Staphylococcus spp. before (November 2015–August 2016) and after (November 2017–8/2018) implementation of a new rapid diagnostic technology were evaluated. RDT results were reviewed once daily by the antimicrobial stewardship team. The primary outcome was time to appropriate antimicrobial therapy. Secondary outcomes included the duration of antimicrobial therapy from time of positive culture, duration of vancomycin therapy, and length of hospital stay (LOS). Results A total of 113 patients were in the pre- and 73 patients were in the post-implementation cohort. Patients treated post-RDT demonstrated significantly shorter median time to appropriate therapy (20.6 hours vs. 49.8 hours, P = 0.03) and numerically shorter median duration of vancomycin therapy (3.0 days vs. 1.0 days, P = 0.32). These numerical differences were present despite the post-RDT cohort having significantly more MSSA and MRSA infections. Differences in duration of antimicrobial therapy were not statistically significant. Patients treated pre-RDT demonstrated a shorter median LOS than those treated post-implementation (7.0 days vs. 8.5 days, P = 0.03). Conclusion The use of RDT significantly decreased time to appropriate antimicrobial therapy. Patients in the post-RDT cohort had longer LOS, which may due to a higher incidence of S. aureus infections, compared with coagulase-negative Staphylococcus, in this cohort These results are promising for future RDT interventions. Disclosures All authors: No reported disclosures.


Author(s):  
Anndee S. Gritte ◽  
Kathleen M. Morneau ◽  
Christopher R. Frei ◽  
Jose A. Cadena-Zuluaga ◽  
Elizabeth A. Walter ◽  
...  

2016 ◽  
Vol 51 (10) ◽  
pp. 815-822 ◽  
Author(s):  
Angel Heyerly ◽  
Ron Jones ◽  
Gordon Bokhart ◽  
Mary Shoaff ◽  
Douglas Fisher

2019 ◽  
Vol 3 (4) ◽  
pp. 601-616 ◽  
Author(s):  
Maya Beganovic ◽  
Erin K McCreary ◽  
Monica V Mahoney ◽  
Brandon Dionne ◽  
Daniel A Green ◽  
...  

Abstract Background Antimicrobial stewardship programs (ASPs) aim to provide optimal antimicrobial therapy to patients quickly to improve the likelihood of overcoming infection while reducing the risk of adverse effects. Rapid diagnostic tests (RDTs) for infectious diseases have become an integral tool for ASPs to achieve these aims. Content This review explored the demonstrated clinical value of longer-standing technologies and implications of newer RDTs from an antimicrobial stewardship perspective. Based on available literature, the focus was on the use of RDTs in bloodstream infections (BSIs), particularly those that perform organism identification and genotypic resistance detection, phenotypic susceptibility testing, and direct specimen testing. Clinical implications of rapid testing among respiratory, central nervous system, and gastrointestinal infections are also reviewed. Summary Coupling RDTs with ASPs facilitates the appropriate and timely use of test results, translating into improved patient outcomes through optimization of antimicrobial use. These benefits are best demonstrated in the use of RDT in BSIs. Rapid phenotypic susceptibility testing offers the potential for early pharmacokinetic/pharmacodynamic optimization, and direct specimen testing on blood may allow ASPs to initiate appropriate therapy and/or tailor empiric therapy even sooner than other RDTs. RDTs for respiratory, central nervous system, and gastrointestinal illnesses have also shown significant promise, although more outcome studies are needed to evaluate their full impact.


2021 ◽  
Author(s):  
Sindew M. Feleke ◽  
Emily N. Reichert ◽  
Hussein Mohammed ◽  
Bokretsion G. Brhane ◽  
Kalkidan Mekete ◽  
...  

AbstractMalaria diagnostic testing in Africa is threatened by Plasmodium falciparum parasites lacking histidine-rich protein 2 (pfhrp2) and 3 (pfhrp3) genes. Among 12,572 subjects enrolled along Ethiopia’s borders with Eritrea, Sudan, and South Sudan and using multiple assays, we estimate HRP2-based rapid diagnostic tests would miss 9.7% (95% CI 8.5-11.1) of falciparum malaria cases due to pfhrp2 deletion. Established and novel genomic tools reveal distinct subtelomeric deletion patterns, well-established pfhrp3 deletions, and recent expansion of pfhrp2 deletion. Current diagnostic strategies need to be urgently reconsidered in Ethiopia, and expanded surveillance is needed throughout the Horn of Africa.


2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S735-S736
Author(s):  
Kimberly C Claeys ◽  
Teri Hopkins ◽  
Zegbeh Kpadeh-Rogers ◽  
Yunyun Jiang ◽  
Scott R Evans ◽  
...  

Abstract Background Rapid diagnostic tests (RDTs) for bloodstream infection (BSIs) are increasingly common. Decisions regarding which RDT to implement remains a clinical challenge given the diversity of organisms and resistance mechanisms detected by different platforms. The desirability of Outcome Ranking Management of Antimicrobial Therapy (DOOR-MAT) has been proposed as a framework to compare RDT platforms but reports of clinical application are lacking. This study compared potential antibiotic decisions based on results of two different RDTs for BSI using DOOR-MAT. Methods Retrospective study at University of Maryland Medical Center from August 2018 to April 2019 comparing Verigene® BC (VBC) to GenMark Dx ePlex® BCID for clinical blood cultures. VBC was part of standard of care, ePlex was run on discarded fresh or frozen blood samples. In this theoretical analysis, RDT result and local susceptibility data were applied by two Infectious Diseases pharmacists to make decisions regarding antibiotic selection in a blinded manner. Cohen’s Kappa statistic summarized overall agreement. DOOR-MAT, a partial credit scoring system, was applied to decisions based on final organism/susceptibility results (Figure 1). Scores were averaged between reviewers and mean scores compared between RDT systems using the t-test. Additionally, a sensitivity analysis with varied point assignment among Gram-negatives (AmpC-producers) was conducted. Results 110 clinical isolates were included; 41 Gram-negative, 69 Gram-positive organisms. Overall agreement was 82% for VBC and 83% for ePlex. The average score for VBC was 86.1 (SD 31.3) compared with ePlex 92.9 (SD 22.9), P = 0.004. Among Gram-negatives, the average score for VBC was 79.9 (SD 32.1) compared with ePlex 88.1 (SD 28.8), P = 0.032. Among GPs the average score for VBC was 89.9 (SD 30.4) compared with ePlex 95.8 (SD 18.3), P = 0.048. Sensitivity analysis demonstrated an average score for of 89.9 (SD 30.4) for VBC compared with 95.8 (SD 18.3) for ePlex, P = 0.27. Conclusion The use of a partial credit scoring system such as the DOOR-MAT allows for comparisons between RDT systems beyond sensitivity and specificity allowing for enhanced clinical interpretation. In this theoretical comparison, the Genmark ePlex BCID scored higher among both GP and GN organisms. Disclosures All authors: No reported disclosures.


2020 ◽  
Vol 105 (9) ◽  
pp. e23.1-e23
Author(s):  
Orlagh McGarrity ◽  
Aliya Pabani

Introduction, Aims and ObjectivesIn 2011 the Start Smart then Focus campaign was launched by Public Health England (PHE) to combat antimicrobial resistance.1 The ‘focus’ element refers to the antimicrobial review at 48–72 hours, when a decision and documentation regarding infection management should be made. [OM1] At this tertiary/quaternary paediatric hospital we treat, immunocompromised, high risk patients. In a recent audit it was identified that 80% of antimicrobial use is IV, this may be due to several factors including good central access, centrally prepared IV therapy and oral agents being challenging to administer to children. The aim of the audit was to assess if patient have a blood culture prior to starting therapy, have a senior review at 48–72 hours, and thirdly if our high proportion of intravenous antimicrobial use is justified.MethodElectronic prescribing data from JAC was collected retrospectively over an 8 day period. IV antimicrobials for which there is a suitable oral alternative, this was defined as >80% bioavailability, were included. Patients were excluded in the ICU, cancer and transplant setting, those with absorption issues and with a high risk infection, such as endocarditis or bacteraemia. Patient were assessed against a set criteria to determine if they were eligible to switch from IV to PO therapy; afebrile, stable blood pressure, heart rate <90/min, respiratory rate < 20/min for 24 hours. Reducing CRP, reducing white cell count, blood cultures negative or sensitive to an antibiotic that can be given orally.Results100% of patients (11) had a blood cultures taken within 72 hours of starting therapy55% of patients had a positive blood culture82% of patients had a senior review at 48–72 hours46% of patients were eligible to switch from IV to PO therapy at 72 hours33% of eligible patients were switched from IV to PO therapy at 72 hoursConclusion and RecommendationsThis audit had a low sample size due to the complexity of the inclusion and exclusion criteria, and the difficulty in reviewing patient parameters on many different hospital interfaces. It is known that each patient is reviewed at least 24 hourly on most wards and therefore there is a need for improved documentation of prescribing decisions. Implementation of an IV to oral switch guideline is recommended to support prescribing decisions and educate and reassure clinicians on the bioavailability and benefits of PO antimicrobial therapy where appropriate. Having recently changed electronic patient management systems strategies to explore include hard stops on IV antimicrobial therapies, however this will require much consideration. Education of pharmacist and nurses is required to raise awareness about antimicrobial resistance and the benefits of IV to PO switches, despite the ease of this therapy at out Trust. This will promote a culture in which all healthcare professionals are active antimicrobial guardians, leading to better patient outcomes, less service pressures, and long term financial benefit.ReferenceGOV.UK. 2019. Antimicrobial stewardship: Start smart - then focus. [ONLINE]Available at: https://www.gov.uk/government/publications/antimicrobial-stewardship-start-smart-then-focus [Accessed 3 July 2019]


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