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Grand Rounds a String of Pearls Attendee Handout Dec 2015

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Grand Rounds a String of Pearls Attendee Handout Dec 2015 9/6/16 Grand rounds: A string of pearls Case #1 Nathan Lighthizer, O.D., F.A.A.O. Assistant Professor, NSUOCO Chief of Specialty Care Clinics Chief of Electrodiagnostics Clinic [email protected] COPE #33259-AS Recurrent Corneal Erosions Recurrent Corneal Erosions (RCE’s) • Tendency for minor trauma to cause • Sx’s: significant corneal epithelial disturbances – Acute, severe pain** • Pathophysiology – Photophobia ** – Abnormally weak attachment between the basal – Redness cells of the corneal epithelium and their basement – membrane Blepharospasm – • Most common causes of the weak attachment Tearing – Mechanical trauma** – Corneal dystrophy** ***Usually sx’s present first thing in the morning upon opening the eyes.*** – Corneal surgery And often this is recurrent Recurrent Corneal Erosions Recurrent Corneal Erosions • Signs: • Signs: – Epithelial defect may be present, – If no defect is present, look for loose, irregular epithelium usually in the inferior interpalpebral area (pooling of NaFl, rapid TBUT) – Signs of corneal dystrophies (will be bilateral) 1 9/6/16 Recurrent Corneal Erosions • Tx: – Acutely: • Lubrication** • Topical Ab (Polytrim QID, erythro or bacitracin ung) • Pain control: – Cycloplegic (Homatropine BID) • Muro 128 drops or ung • Bandage lens??? – Alleviates pain, does not improve healing Recurrent Corneal Erosions Recurrent Corneal Erosions • Tx: • Surgical Tx: – After the epithelium heals (recalcitrant RCE’s): – Anterior stromal micropuncture • Fresh Kote TID (15ml bottle $25) – • Muro 128 ung qhs (3.5g tube $10) Debridement of epithelium with polishing of Bowman’s membrane with a diamond burr or • Lotemax QID X 2 weeks, BID X 6 weeks excimer laser (PTK) • Doxycycline 20-50mg BID – Azasite BID (2.5ml bottle $78) **Avoid chronic long-term AT ung** Eyelid abscess vs. Preseptal Cellulitis vs. Orbital Cellulitis • Preseptal Cellulitis • Orbital Cellulitis – Usually upper eyelid – All the same signs of Case #2 swelling preseptal with – Pain, tenderness, – Proptosis redness – EOM restrictions/pain with eye movements – Usually caused by – Pupillary involvement adjacent infection (hordeolum, – Usually an extension dacryocystitis) from an ethmoid sinusitis 2 9/6/16 Preventing Resistance Oral Antibiotic • Just one organism, methicillin-resistant Staphylococcus aureus (MRSA), kills Paradigm more Americans every year (∼19,000) than emphysema, HIV/AIDS, Parkinson's disease, and homicide combined – most serious MRSA infections, an estimated 85%, are associated with a healthcare exposure, but nearly 14% of the infections are community- associated. • Almost 2 million Americans per year develop hospital-acquired infections (HAIs), resulting in 99,000 deaths the vast majority of which are due to antibiotic- Penicillins Cephalosporins Fluoro- Macrolides Sulfa resistant pathogens quinolones • CDC: Get Smart: Know When Antibiotics Work – teaches both the provider and the patient when antibiotics should be used. • The IDSA suggests five to seven days is long enough to treat a bacterial Augmentin infection without encouraging resistance in adults, though children should still Keflex Zithromax Bactrim DS 875mg BID or Levaquin or get the longer course 500 mg TID Cipro 500mg TID “Z-pak” 800/160 BID – this is different than previous guidelines of treating infections from 10-14 days. 9/6/16 Ocular TRUST 3: Ongoing Longitudinal Surveillance Ocular Trust 3 of Antimicrobial Susceptibility in Ocular Isolates • Background: • Antimicrobials tested represent six classes of drugs: • Ocular TRUST is an ongoing annual survey of nationwide – fluoroquinolones (ciprofloxacin, gatifloxacin, levofloxacin, antimicrobial susceptibility patterns of common ocular pathogens. moxifloxacin); • To date, more than 1,000 isolates from ocular infections have been – dihydrofolate reductase inhibitors (trimethoprim); submitted to an independent, central laboratory for in vitro – macrolides (azithromycin); testing. – aminoglycosides (tobramycin); – polypeptides (polymyxin B); and • Ocular TRUST, now in its third year, remains the only longitudinal nationwide susceptibility surveillance program – β-lactams (penicillin). specific to ocular isolates. • Staphylococci were classified as methicillin-resistant (MRSA) or methicillin-susceptible (MSSA) based on susceptibility to oxacillin. Ocular Trust 3: Results Oral Antibiotic • most antimicrobials, except penicillin and polymyxin B, continue Paradigm to be highly active against MSSA (azithromycin shows only moderate activity) • with the exception of trimethoprim and tobramycin, less than one-third of MRSA strains are susceptible to ophthalmic antimicrobials Penicillins Cephalosporins Fluoro- Macrolides Sulfa quinolones • susceptibility profiles remain virtually identical for the fluoroquinolones, regardless of methicillin phenotype • S. aureus is more susceptible to the fluoroquinolones than to Augmentin Keflex Zithromax Bactrim DS 875mg BID or Levaquin or macrolides, as represented by azithromycin 500 mg TID 500mg TID “Z-pak” Cipro 800/160 BID 3 9/6/16 Acanthamoeba keratitis • History of CL wear w/ poor lens hygiene • Often a history of hot tub/swimming pool/swimming in the river Case #3 • Symptoms: – Severe pain out of proportion to clinical picture – Redness & photophobia – All over the course of several weeks • Signs: – Early -> Pseudodendrites – Late -> Ring-shaped stromal infiltrate Acanthamoeba Keratitis Acanthamoeba Keratitis • Sx’s: • Signs: – Severe pain** – – Redness Epithelial or subepithelial infiltrates – Tearing appearing as pseudodendrites early on – Decreased vision – Patchy anterior stromal infiltrates can – Photophobia also appear early – Minimal discharge These sx’s tend to develop over a period of weeks.** H/O CL hygiene problems and swimming in lenses** Acanthamoeba Keratitis Acanthamoeba Keratitis • Signs: • Tx: – Topicals: – Radial keratoneuritis** • PHMB 0.02% drops q1h • Perineural infiltrates seen during the first 1-4 • Chlorhexidine 0.02% q1h weeks – Fine line agents can be given separately or together • Propamidine 1% (Brolene) q1h – Gradual enlargement and coalescence of the – Orals: infiltrates to form a ring infiltrate** • Voriconazole 200 mg BID • Inflammation in the cornea doesn’t look that bad** • Itraconazole 200-400 mg QD – Corneal thinning, melting, perforation, – Cycloplegics (homatropine BID) scleritis, hypopyon – Topical steroids?? – Pain control – Surgery 4 9/6/16 Fungal keratitis Fungal Keratitis • Often a history of vegetative trauma, CL • Sx’s: wear – Gradual onset of pain • H/O poor response to topical Ab’s – Irritation/grittiness • Symptoms: – Photophobia – Pain, photophobia, tearning, FB sensation – Blurred vision • Pain often less than what the clinical picture would indicate – Watery or mucopurulent discharge • Signs: – Stromal infiltrate w/ a feathery border H/O cornea infection diagnosed as bacterial** – Satellite lesions surrounding the primary H/O vegetative trauma, CL abuse, chronic steroid infiltrate use Fungal Keratitis Fungal Keratitis • Signs: • Signs: – Gray-white stromal infiltrate with indistinct – Epithelial defect overlying the ulcer “fluffy” or “feathery” borders/margins • However can be quite small and sometimes is not – Often surrounded by fingerlike satellite present lesions in the adjacent stroma – Infiltrates may progressively enlarge and extend into deeper tissue • Necrosis, thinning and perforation can occur Which topical antibiotic is your “go-to” Fungal Keratitis choice for a suspected MRSA infectious bacterial ulcer? • Tx: A. Zymaxid/Zymar – Pts may require hospitalization B. Polytrim – Topical meds: • Natamycin 5% (for filamentous fungi)* C. Besivance • Amphotericin B 0.15% (for Candida)* • Both q1h around the clock initially and then tapered D. Moxeza/Vigamo over 6-12 weeks x – Orals meds: E. Ciloxan • Voriconazole 200 mg BID • Itraconazole F. Tobramycin • Fluconazole G. Vancomycin – Cycloplegics (homatropine BID) – Surgical (PKP or DALK) 5 9/6/16 Bacterial Keratitis Ocular Trust 3: Results • Tx: • most antimicrobials, except penicillin and polymyxin B, continue – Hospitalization??? to be highly active against MSSA (azithromycin shows only moderate activity) – No CL’s*** • with the exception of trimethoprim and tobramycin, – Pain relief less than one-third of MRSA strains are susceptible – Topical Ab’s: (amount & strength depends on the to ophthalmic antimicrobials ulcer) • Besivance, Moxeza, or Zymaxid q1h around the clock for • susceptibility profiles remain virtually identical for the 24-48 hours & tapering according to clinical progress fluoroquinolones, regardless of methicillin phenotype • Besivance (or Moxeza or Zymaxid) & Tobramycin (or Gentamicin) q1h alternating around the clock • S. aureus is more susceptible to the fluoroquinolones than to macrolides, as represented by azithromycin • Fortified Ab’s??? (large ulcers, visual axis, hypopyon) – Fortified Vancomycin, cephalosporins and/or gentamicin Bacterial Keratitis • Tx: – Steroids??? • Reduce inflammation, improve comfort, and minimize corneal scarring…but evidence that they improve final Case #4 visual outcome is limited • Will make herpes, fungal, acanth much worse • Epithelialization may be slowed by steroids • Can cause corneal thinning (but not usually) • DO NOT USE until clinical improvement is seen with Ab’s alone • Pred Forte QID – Doxycycline or Azasite??? • Inhibit MMP-9 Scleritis Scleritis • Rare disorder of inflammation & necrosis • Types of Scleritis centered on the sclera 1. Diffuse anterior scleritis • 30-60 year olds, female > male 2. Nodular anterior scleritis
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