2/15/15. Case Studies in Infec3ous Diseases. Richard A. Jacobs, M.D., PhD. NO DISCLOSURES
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1 Case Studies in Infec3ous Diseases Richard A. Jacobs, M.D., PhD. NO DISCLOSURES 1
2 CASE PRESENTATION A 45 year old man awoke the day prior to presenta3on with a sore throat. Throughout the day the sore throat worsened, and he had difficulty ea3ng dinner because of pain. The next morning he awoke with an even worse sore throat and an elevated temperature of F. In the office he complained of a severe sore throat, his temperature was 98 F and his pharynx had mild erythema without exudate. What would you do at this point? 1. Rapid strep test 2. An3bio3cs without tes3ng 3. Observe without an3bio3cs (send home) 4. Send to ENT 5. Order head/neck CT 20% 20% 20% 20% 20%
3 SORE THROAT DIAGNOSIS NOT TO MISS Epiglo]3s Uvuli3s Para and retropharyngeal abscess Angioedema/anaphylaxis Diphtheria Foreign Body HIV 3
4 When To Suspect Epiglo]3s Worst sore throat of my life With minimal findings on exam Hoarse/muffled voice Severe odynophagia Adult Epiglo]3s Increasing incidence in adults (decreasing in children due to Hib vaccina3on) Adults - - more indolent (days v hours) and less toxic appearing Dx made by direct visualiza3on fiberop3c laryngoscopy less likely to provoke spasm than mirror exam Lateral neck films less sensi3ve than laryngoscopy, but s3ll good in adults 77% - 88% sensi3ve ( thumb sign ) 4
5 Adult Epiglo]3s Bacteriology H. influenzae/parainfluenzae; S. pneumoniae; Gp A strep; S. aureus (MSSA & MRSA) Therapy An3bio3cs 3 rd genera3on cephalosporin +/- vancomycin (severe sepsis or require intuba3on) Airway maintenance not standard as it is in children Steroids Controversial generally not given as no clear benefit demonstrated Case Presenta3on 20 year old previously healthy male Day 1 Onset of sore throat with fever Day 2 Evaluated in office exuda3ve pharyngi3s with tender anterior cervical adenopathy, h/o fever and no cough (4/4 of Centor Criteria) Azithromycin started (within 24 hours of onset of symptoms) 5
6 Diagnosis of Gp A Streptococcal Pharyngi3s IDSA (Infec3ous Disease Society of America) Rapid strep test ACP (American College of Physicians) and the AAFP (American Academy of Family Prac3ce) Modified Centor Criteria Modified Centor Criteria Score 3 or 4 > Rx empirically 6
7 Case Presenta3on 20 year old previously healthy male Day 1 Onset of sore throat with fever Day 2 Evaluated in office exuda3ve pharyngi3s with tender anterior cervical adenopathy, h/o fever and no cough (4/4 of Centor Criteria) Azithromycin started (within 24 hours of onset of symptoms) Case Presenta3on Day 3 PC not beqer s3ll with sore throat and fever Plan con3nue azithromycin Day 5 Phone Call not beqer Diffuse myalgias, difficulty swallowing, pain on (R) side of neck Plan- - to finish Azithromycin; encourage fluids; ibuprofen for symptom relief; call if not beqer 7
8 Case Presenta3on Day 6 PC- - SOB and pleuri3c chest pain Instructed to go to ED for evalua3on Case Presenta3on ED evalua3on WBC 21,400 with 51% PMNs and 42% bands Plts 16,000 BUN 80, Cr 4.2 PTT 50; FDP elevated ph 7.29 with elevated lac3c acid CXR, chest CT and BCs obtained 8
9 Case Presenta3on- - CXR Case Presenta3on Chest CT 9
10 Case Presenta3on Blood Culture Fusobacterium necrophorum What Went Wrong? Natural History of GpA Streptococcal Pharyngi3s w/o therapy, symptoms beqer in 3-4 days With early therapy (24 hours) symptoms resolve hours sooner 10
11 2009;151: ;151; Fusobacterium necrophorum Anaerobic gram- nega3ve rod An important upper respiratory pathogen in ADOLESCENTS AND YOUNG ADULTS (ages 15-25) Can isolate F. necrophorum from 10% with sore throat (equal in frequency to gp A streptococcus) Peritonsillar abscesses F. necrophorum isolated in 23% (most in pure culture) c/w gp A streptococcus 17% 2009;151: Fusobacterium necrophorum Complica3on LEMIERRE S SYNDROME Sep3c phlebi3s IJ vein, bacteremia, sep3c pulmonary emboli/abscess Es3mated to occur in 1 of 400 cases of F. necrophorum pharyngi3s (more common than Rheuma3c Fever following gp A streptococcal pharyngi3s) 11
12 Pharyngi3s in Adolescents Fusobacterium necrophorum Resistant to azalides and macrolides (azithromycin/clarithromycin) Sensi3ve to penicillins, cephalosporins and clindamycin Take Home Points Pharyngi3s in the adolescent and young adults (ages 15-25) can be more complicated than previously thought ALTHOUGH CONTROVERSIAL, SOME HAVE RECOMMENDED In pa3ents years of age, with a Centor score of > 3 and nega3ve diagnos3c tests for gp A strep to treat with penicillin, amoxicillin or a cephalosporin 12
13 Take Home Points WHAT IS NOT CONTROVERSIAL Remember the natural history of pharyngi3s If pa3ents do not improve as expected think about complica3ons Peritonsillar abscess Retropharyngeal abscess Lemierre s syndrome Trivia Ques3on # 1- - Which President Died of Peritonsillar Abscess? 1. John Quincy (Quinsy?) Adams? 2. Thomas Jefferson 3. George Washington 4. Andrew Jackson 100% 1 13
14 Case Presenta3on 55 y/o woman with a past hx of kidney stones presents to Urgent Care c/o upper mid- back pain and pain in the ley shoulder for 2 days. No history of trauma. On PE she is afebrile with normal vital signs and TTP over the ley posterior shoulder. She is treated symptoma3cally and sent home Case Presenta3on The following day, as instructed, she calls her PCP who orders thoracic and lumbar spine films > degenera3ve disc disease CBC > WBCs 14.6 (4-11) with 90% PMNs (40-80) ESR > 48 (0-15) 14
15 Case Presenta3on Told to go back to Urgent Care b/o elevated WBCs. She c/o pain in the upper back that has been ge]ng progressively worse. Her Temp is F and on exam there is tenderness in the thoracic paraspinous area WBC > 14.5 UA > WBC s/hpf; 0-2 RBCs; 1+ bacteria ABD CT > bilateral renal calculi and no hydronephrosis Your next step? 1. Analgesics and fluids for renal calculi 2. Analgesics for musculoskeletal pain 3. Nitrofurantoin for a UTI 4. MRI spine 20% 20% 20% 20% 20%
16 Case Presenta3on Told to go back to Urgent Care b/o elevated WBCs. She c/o pain in the upper back that has been ge]ng progressively worse. Her Temp is F and on exam there is tenderness in the thoracic paraspinous area WBC > 14.5 UA > WBC s/hpf; 0-2 RBCs; 1+ bacteria ABD CT > bilateral renal calculi and no hydronephrosis 16
17 FEVER AND BACK PAIN Pyelonephri3s w/wo stone and obstruc3on Pancrea33s Cholecys33s PID Endocardi3s Osteomyeli3s/Disci3s Epidural abscess Take Home Point Fever and back pain is an epidural abscess un3l proven otherwise*** Best diagnos3c test is an MRI with contrast 17
18 *** BUT ONLY 50% OF PATIENTS WITH AN EPIDURAL ABSCESS HAVE FEVER ON PRESENTATION Role of ESR/CRP in Diagnosis If there is back pain and a predisposing condi3on for SEA (DM, IVDU, co- exis3ng infec3on, recent back surgery, indwelling catheter, immunocompromised) Obtain an ESR/CRP If elevated > obtain MRI (sensi3vity 98% Specificity 70%) (J Neurosurg Spine 14: , 2011) 18
19 Case Presenta3on A 62 y/o man with HTN, hyperlipidemia and CAD presents with new onset of headache. He notes that over the last 2-3 weeks he has not been feeling well with intermiqent low- grade fevers and decreased appe3te. On PE he is afebrile with a BP of 118/65 and a P of 98. He has a 2/6 SEM at RUS boarder (old) but an otherwise normal exam. A diagnosis of sinusi3s is made > Augmen3n for 7 days Case Presenta3on He presents 2 weeks later to the ED with a visual field defect. An CT is done and he is found to have a (R) posterior communica3ng artery infarct. He notes that ini3ally he felt beqer on the an3bio3cs, but when stopped he developed low grade fevers again. CBC > 14.3 with a normal diff; Hct = 32 ESR > 77 19
20 At this point you would?? 1. MRI of the Brain 2. CT of the sinuses 3. Do a temporal artery BX 4. Obtain BCs 20% 20% 20% 20% 20% Blood Cultures Gram nega3ve rods 20
21 HACEK organisms Case Presenta3on Haemophilus aphrophilus Ac3nobacillus ac3nomycetemcomitans (Aggrega3bacter ac3nomycetemcomitans) Cardiobacterium hominus Eikenella corrodons Kingella kingae Trivia Ques3on # 2 Kingella kingae named ayer the American bacteriologist Elizabeth O. King Can you name the two other organisms with same genus and species name to honor their discoverer? NOTE LOA LOA does not qualify Mongin, a French surgeon was the first to remove the worm from a pa3ent s eye 21
22 Take Home Points A prolonged fever is NOT a viral syndrome or a self- limited bacterial infec3on Anyone with a prolonged fever should have blood cultures drawn A central nervous system event, especially in a young, otherwise healthy individual, is endocardi3s un3l proven otherwise Case Presenta3on The den3st of your 45 year old female pa3ent with MVP and moderate mitral regurgita3on calls wan3ng to know if she needs an3bio3c prophylaxis for a root canal and which one. 22
23 Should prophylaxis be given? 100% 1. Yes 2. No 1 Prophylaxis for Endocardi3s New AHA Guidelines from 2007 Updated from 1997 Transient bacteremia occurs in up to 50% of individuals as a result of normal daily ac3vi3es Endocardi3s is much more likely to occur from frequent bacteremias associated with daily ac3vi3es than from bacteremias caused by dental, GI or GU procedures. 23
24 Procedures for Which Endocardi3s Prophylaxis is Recommended DENTAL PROCEDURES that involve manipula3on of gingival 3ssue, periapical region of the tooth or perfora3on of oral mucosa NOT ROUTINE DENTAL CLEANING RESPIRATORY PROCEDURES with viola3on of the mucosa- - tonsillectomy/adenoidectomy, bronchoscopy with biopsy, drainage of an infec3on (empyema) Procedures for Which Endocardi3s Prophylaxis is Recommended GI PROCEDURES likely to cause bacteremia dila3on of esophageal strictures, treatment of varices, ERCP with obstructed ducts NOT ROUTINE UPPER ENDOSCOPY, COLONOSCOPY OR SIGMOIDOSCOPY SKIN/MUSCULOSKELETAL PROCEDURES drainage of abscesses (an3bio3cs ac3ve against S. aureus) 24
25 Recommended Regimens 25
26 Case Presenta3on The den3st of your 65 year old pa3ent who is 9 months s/p total hip arthroplasty calls wan3ng to know if prophylaxis should be given for a root canal Should Prophylaxis Be Given? 100% 1. Yes 2. No 1 26
27 Dental Prophylaxis for Prosthe3c Joints Area of controversy for years between the ADA, AAOS and IDSA 2004 AAOS & ADA recommenda3on prophylaxis if joint placed within past 2 years 2009 AAOS recommends prophylaxis for all prosthe3c joints regardless of when placed Promise of collabora3on with joint guidelines GOOD NEWS AAOS & ADA propose new guidelines Dental Prophylaxis for Prosthe3c Joints BAD NEWS > Grade of Recommenda3on is Limited: The prac33oner might consider discon3nuing the prac3ce of rou3nely prescribing prophylac3c an3bio3cs for pa3ents with hip and knee prosthe3c joint implants undergoing dental procedures. Implica3ons: Prac33oners should be cau3ous in deciding whether to follow a recommenda3on classified as Limited 27
28 What TO DO?? Disconnect between organisms causing PJIs and mouth flora Late infec3ons almost always due to skin flora (S. epi, P. acnes, corynebacterium spp) not streptococci found in the mouth Bacteremias common as a result of everyday ac3vi3es Best study cited in the recommenda3ons: Clin Infect Dis 2010;50:8-16 Clin Infect Dis 2010;50:
29 Risk of PJIs Following Dental Procedures Prospec3ve case control study comparing pa3ents with PJI to pa3ents randomly admiqed to orthopedic floor Dental records obtained and reviewed by DDS Variables were high and low risk procedures and whether the pa3ent received an3bio3c prophylaxis Conclusions Dental procedures do NOT increase risk of PJI An3bio3c prophylaxis does NOT decrease the risk of PJI infec3on 29
30 Take Home Points Prophylaxis NOT indicated for pins, plates, fixa3on devices, THA or TKA regardless of when the implant was placed Case Presenta3on Your 48 y/o female pa3ent pa3ent with asthma, who is on a tapering dose of prednisone (present dose 20 mg) for a recent exacerba3on, is seen over the weekend at an Urgent Care Clinic for a 3 day h/o fever to 102 F, nasal conges3on and facial pain. A diagnosis of ABRS is made and she is placed on amoxicillin- clavulanate (Augmen3n) 875/125 BID. 30
31 Case Presenta3on 3 days later she comes in to see you saying that she is no beqer on the amoxicillin- clavulanate. At this point you would? 1. Increase the amoxicillin- clavulanate to 2 gm BID 2. Change to levofloxacin 3. Do a sinus CT 4. Refer to ENT 20% 20% 20% 20% 20%
32 Pathogenesis of Acute Bacterial Rhinosinusi3s It is almost always a pyogenic complica3on of a viral upper respiratory tract infec3on Viral infec3on causes mucocilliary dysfunc3on, allowing bacteria from the nasopharynx to ascend to the sinuses and invade the mucosa Risk factors for Acute Fungal Rhinosinusi3s Hematologic malignancies Hematopoie3c stem cell transplanta3on Chemotherapy- induced neutropenia Solid organ transplanta3on Advanced HIV infec3on Diabetes mellitus Glucocor3coids 32
33 Endoscopy Was Performed Take Home Point Maintain a high degree of suspicion in immunocompromised pa3ents who present with sinus complaints, especially those without a preceding viral upper respiratory infec3on 33
34 Trivia Ques3on Can you name the two other organisms with same genus and species name to honor their discoverer? Trivia Answer Morganella morganii named ayer the Bri3sh bacteriologist H. de R. Morgan Rickeqsia rickeqsii named ayer the American pathologist Howard Taylor Rickeqs 34
35 Case Presenta3on A 22 yr old comes to the office complaining of the acute onset of unilateral weakness of the right side of his face. Your diagnosis is Bell s Palsy. What is Your Therapy 100% 1. Prednisolone 2. Acyclovir 3. Prednisolone + acyclovir 4. Nothing 1 35
36 E3ology of Facial Nerve Palsy 50% are idiopathic (Bell s Palsy) Herpes Simplex/Varicella Zoster Lyme disease (most common cause of bilateral FN palsy) Diabetes Sarcoid Trauma Tumors Other infec3ons CMV, EBV, HIV Therapy of Bell s Palsy Quite controversial Because of the associa3on with herpes viruses the use of acyclovir has been felt to be beneficial Two well done prospec3ve, randomized, controlled, blinded studies have been done 36
37 Therapy of Bell s Palsy Lancet Neurol 2008;7: Therapy of Bell s Palsy 839 pa3ents enrolled within 72 hours of onset of symptoms Placebo + placebo (206) Prednisilone (60mg X 5 days then reduced by 10 mg/day) + placebo (210) Valacyclovir (1000mg TID X 7 Days) + placebo (207) Valacyclovir X7 Days + prednisolone X10 Days (206) 37
38 Prednisilone Prednisilone + valacyclovir Placebo Valacyclovir + placebo Therapy of Bell s Palsy Case closed on therapy??? NO!! Other less powered studies and subgroup analyses suggest that acyclovir might be beneficial in the most severe cases Minimal or no movement of facial muscles and inability to close the eye 38
39 Take Home Points Early treatment (within 72 hours of onset) recommended For most cases prednisolone for 10 days is adequate For severe cases (complete or near complete paralysis) prednisolone for 10 days + valacyclovir for 7 days is recommended 39
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