Antimicrobial Stewardship - ACP · •Increased testing of urine cultures and hospital resources...
Transcript of Antimicrobial Stewardship - ACP · •Increased testing of urine cultures and hospital resources...
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Antimicrobial Stewardship
Robert Ross, MD
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Disclosures
• None
• No off label indications will be discussed
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Case
• 72 yo man with history of COPD
• H/o prior C. difficile colitis
• Intermittent sinus congestion and drainage over the past several months, started in the fall but persists
• Given 10 days of oral antibiotic 4 weeks prior
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Case
• Clinically stable until 2 days prior to presenting to emergency department had onset diarrhea, chills and malaise
• Admitted to ICU with septic shock
• Diffuse colitis on CT
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Goals
• Scope of the problem
• Elements of Antimicrobial Stewardship (AMS)
• Specific targeted conditions for intervention
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Antimicrobial Stewardship
• IDSA published initial guidelines in 1988
• IDSA & SHEA jointed issued updated guidelines in 1997
• Most recent guidelines 2007
• CDC Get Smart program started in 2012
• Maryland Antimicrobial Stewardship Initiative
• CMS/TJC requirement 2017
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Antimicrobial Stewardship
• Up to 50% of antibiotic use in inappropriate
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Antimicrobial Stewardship
• Increased antibiotic use leads to increased antibiotic resistance
• Increased antibiotic resistance leads to poorer patient outcomes
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Antibiotic Resistance
• 3 year study of patients admitted to BI-Deaconess Medical Center with resistant Enterobacter
• Case matched to patients with susceptible strains
• Outcomes reviewed
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Cosgrove et al, CID 2006: 42
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Antibiotic Resistance
• 2 year study at U. Penn with infections due to E. coli or K. pneumoniae with ESBL production
• Case matched to patients with susceptible strains
• Outcomes reviewed
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Cosgrove et al, CID 2006: 42
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Outpatient Antimicrobial Stewardship
• National Action Plan for Combating Antibiotic-Resistant Bacteria
– Goal to reduce inappropriate antibiotic use by 50% by 2020
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Outpatient Antimicrobial Stewardship
• 2010-2011 National Ambulatory Medical Care Survey – 184,032 visits
– 12.6% visits resulted in antibiotic prescriptions • Sinusitis
• Otitis media
• Pharyngitis
– For respiratory tract illness 221 prescriptions/1000 patient • 50% deemed clinically appropriate
JAMA 2016; 315(17): 1864-1873
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JAMA 2016; 315(17): 1864-1873
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Outpatient Antibiotic Use
• 506 antibiotic prescriptions per 1000 persons in ambulatory settings 2010-2011
• Approx 154 million antibiotic prescriptions in the US during 2010-2011
• 2014 data 835 antibiotic prescriptions per 1000 persons
• 2014 Sweden 328 antibiotic prescriptions per 1000 persons
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Goals of Antimicrobial Stewardship
• Decrease resistance
• Decrease inappropriate antibiotic use
• Decrease costs
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What is Antibiotic Stewardship?
• Definition of Stewardship: “the careful and responsible management of something entrusted to one’s care”
• Limiting inappropriate use “The most important decision is not what antibiotics to use, but whether to use antibiotics at all.” • Optimizing antibiotic therapy
– The Right Antibiotic at – The Right Dose for – The Right Duration
• Minimizing adverse events – Resistance – Adverse Effects – Cost
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AMS Strategies
• Education
• De-escalation of therapy
• Dose optimization
• IV to PO conversion
• Guidelines/order sets/clinical pathways
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Antimicrobial Stewardship
• Right Antibiotic
• Right Dose
• Right Duration
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Antimicrobial Stewardship
• Right Antibiotic
– Does patient need antibiotics
– Guidelines for specific conditions
• Uncomplicated cystitis
• Acute bacterial rhinosinusitis
• Pharyngitis
• Skin and soft tissue infections
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Antimicrobial Stewardship
• Right Dose
– Optimal antibiotic dosing is often smaller more frequent doses
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Antimicrobial Stewardship
• Right Duration
– Uncomplicated cystitis: 3 days
– Pneumonia: 5 days
– Group A Streptococcal pharyngitis: 10 days
– Cellulitis: 5 days
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Does It Work
• Trial involving large primary care network with 16 sites participating
• Split into intervention group and usual practice
– Intervention group had clinical education session on antimicrobial stewardship and 1 year personalized follow up with audits of prescribing practices and feedback
– Usual practice group no intervention
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JAMA 2013; 309(22): 2345-2352
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JAMA 2013; 309(22): 2345-2352
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JAMA 2013; 309(22): 2345-2352
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Case
• 67 yo woman with no significant PMH
• Presented with several days dysuria and urgency
• UA was notable for +LE and pyuria (20-50 WBC/hpf) and culture grew E. coli
• Treated with TMP/SMX for 3 days with resolution of symptoms
• Repeat culture revealed E. coli
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Asymptomatic Bacteriuria
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Definition
• Asymptomatic bacteriuria (ASB) is the isolation of a specified quantitative count of bacteria in an appropriately collected urine specimen obtained from a person without symptoms or signs referable to urinary tract infection
• Patients with ASB do not have urinary symptoms of: dysuria, increased urgency, increased frequency, suprapubic tenderness, costovertebral angle pain/tenderness
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Complications of treatment of ASB
• Increased use of antibiotics • Increased antibiotic resistance • Increased C. difficile infections • Increased adverse drug reactions • Increased testing of urine cultures and hospital
resources • Potential increased length of stay in hospital • Overestimation of UTIs (and catheter-associated
UTIs) in the hospital Overall: Screening men and non-pregnant women for ASB is ineffective in improving clinical outcomes. There is no impact on mortality when treating ASB.
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Colonization: high prevalence of ASB in selected populations
Population Prevalence
Healthy pre-menopausal women 1-5%
Pregnant women 2-10%
Post-menopausal women (50-70 y/o) 3-9%
Elderly women in the community 11-16%
Elderly men in the community 4-19%
Diabetic women 9-27%
Diabetic Men 1-11%
HD patients 28%
Female long-term care residents 25-50%
Male long-term care residents 15-40%
Patients with short-term urinary catheters
9-23%
Patients with long-term urinary catheters 100%
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Evaluation of the UA
• Urine WBC – Pyuria alone is not an indication of treatment. It
requires symptoms – Pyuria can be seen in patients with catheter use, STDs,
renal tuberculosis, interstitial nephritis, and/or ASB. – However, the absence of pyuria may rule out a UTI.
• Urine LE & urine nitrites – The presence of LE suggests WBC will be present and
nitrites suggest that gram-negative organisms are present, yet neither of these findings is diagnostic of a UTI
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Evaluation of the UA
• Urine squamous epithelial cells > 2/hpf
– A positive result suggests that the specimen is contaminated and results of the urinalysis should be ignored
• ≥ 3 bacterial species in urine culture
– Presence of ≥ 3 bacterial species suggest that the specimen is contaminated and results of the urine culture should be ignored
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Who to Treat
Patient Population Evidence
Pregnant women More likely to experience premature delivery and to have infants of low birth weight. Increased risk of developing pyelonephritis.
Before Transurethral Resection of the Prostate (TURP)
High risk of post-procedure bacteremia and sepsis
Traumatic genitourinary procedures for which mucosal bleeding is anticipated
High risk of post-procedure bacteremia and sepsis
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Who Not to Treat Patient Population Evidence
Premenopausal, non-pregnant women
May increase risk of UTI and pyelonephritis, but not HTN, CKD, GU cancer, or mortality. If treated, may increase risk of resistance.
Diabetic women No difference in rates of symptomatic UTI, mortality, or progression of diabetes. Treatment did not decrease number of hospitalizations for UTI. If treated, increases risk of ADR.
Older persons living in the community
No change in mortality
Elderly, institutionalized subjects
No changes in mortality or chronic genitourinary symptoms. Increases ADR and resistance.
Persons with spinal cord injury
High levels of reinfection and resistance
Catheterized patients while the catheter remains in situ
When treated, often immediate recurrence and increased risk of resistance
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Treatment of Asymptomatic Bacteriuria
• Study collected urine samples from asymptomatic women
• If urologic organisms identified patients either
– Received no treat (Group A)
– Treatment for the identified organism (Group B)
• Monitored incidence of UTI for the following 12 months
CID 2012; 55: 771-777
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Treatment of Asymptomatic Bacteriuria
CID 2012; 55: 771-777
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Case
• 48 yo man presents with 7 days of URI sx
• Initially sore throat with rhinitis and rhinorrhea
• Those sx have improved but now c/o of “sinus pressure” and ongoing nasal discharge
• Sx have improved but are still present at day 7
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Sinusitis
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Sinusitis
• Rhinosinusitis
– Acute Rhinosinusitis
• Acute bacterial rhinosinusitis
– Chronic Rhinosinusitis
• 12% of population diagnosed in a given year
• 11% of all primary-care visits
• Approx 80% of visits result in antibiotic prescription
Otolaryngology – Head and Neck Surgery 2015; 152: S1-S39
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Sinusitis
• 90% or greater ARS is viral in nature
• Guidelines exist to aid determination of ABRS from VRS (Viral Rhinosinusitis)
– Symptoms persists beyond 10 days from onset without some improvement (not resolution)
Otolaryngology – Head and Neck Surgery 2015; 152: S1-S39
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Sinusitis
• VRS: Symptomatic management – nasal steroids, saline irrigation, analgesics
• ABRS: Symptomatic management and Amoxicillin 5-10 days
• Chronic rhinosinusitis: Evaluation for mechanical factors and symptomatic management
Otolaryngology – Head and Neck Surgery 2015; 152: S1-S39
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Case
• 32 yo woman presents with several days of sore throat with some odynophagia
• No fevers but has some nasal congestion
• On exam tonsils are erythematous and enlarged
• Rapid Strep Ag test is negative
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Pharyngitis
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Pharyngitis
• Can be difficult to distinguish between viral and Streptococcal pharyngitis
• Overtly viral symptoms include rhinorrhea, rhinitis, hoarseness, oral ulcers and cough
• Do not test with viral symptoms and treatment is symptomatic
• Rapid testing or culture should be performed
• In adults a negative rapid test is sufficient
• Treatment if positive
CID 2012; 55: 86-102
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C. difficile Colitis
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J Antimicrob Chemother 2011; 66: 2168-2174
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CID 2011; 53 (Suppl 1): S23-S28
Other Benefits of Antimicrobial Stewardship
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Antibiotics Are Not Benign
www.cdc.gov/antibiotic-use/community/about/should-know.html