What You Don’t Know Can Hurt You - asmbranches.org. Tuberculosis. B. Organ Rejection. C. Invasive...
Transcript of What You Don’t Know Can Hurt You - asmbranches.org. Tuberculosis. B. Organ Rejection. C. Invasive...
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What You Don’t Know Can Hurt You:
Infections in Transplant Recipients
Peter V. Chin‐Hong, MD MASMarch 7, 2014
UCUCSFSF
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General Pearls
• Immunocompromised patients with infections
– are often sicker than they look– often have more extensive disease than is
apparent– may require longer treatment than others– may have unusual infections– often require invasive procedures– may need to have immunosuppression
reduced
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Infection‐related mortality in heart transplant recipients
Dummer JS, In Kaye MP et al eds, Heart and Lung transplantation 2000
1980-1985
1985-1987
1987-1990
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Indication for hospitalization post‐ transplantation
Dharnidharka VR. AJT. 04
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Grulich AE et al, 2007,Lancet 370:59-67
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Case• 42 year old male from Guam with ESRD
secondary to glomerulonephritis, s/p living unrelated kidney transplant 4 months PTA (UCSF) presented with fevers to 39 and chills and soaking night sweats for 2 months
• One month ago he was discharged from UCLA after a “negative” fever workup
• HD#3: CXR: ill-defined nodular opacity seen on CXR
• HD#6: CT chest
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Case
What is the most likely scenario?A. TuberculosisB. Organ RejectionC. Invasive AspergillosisD. All of the Above
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Case
What is the most likely scenario?A. TuberculosisB. Organ RejectionC. Invasive AspergillosisD. All of the Above
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Infection Timetable
NOSOCOMIAL,
TECHNICAL
OPPORTUNISTIC(Donor, recipient, exposure)
COMMUNITY ACQUIRED
CMV
Aspergillus
PCP
HSV
VZV
EBV
Nocardi
aListeriaToxo
Tuberculosis
Pneumococcal
PNA
Respirator
y viruses
Crypto
CRBSI
SSI
C. diff
VAP
Valganciclovir
Valganciclovir
TMP‐SMX
TMP‐SMX
Treatment for rejection
Biliary
leak
Endemic
mycosesBK virus
Voriconazole
Voriconazole
Voriconazole
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Determinants of Infection
• Technical aspects of surgery– Liver, lung > heart > kidney
• Environmental exposure– TB, endemic mycoses, Strongyloides– Gardening: Aspergillus, Nocardia– Food and water: Salmonella, Listeria
• Degree of immunosuppression– Medications, host factors,
immunomodulating infections (CMV)
• Type of immunosuppression
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Relationship of OR time to incidence of infections
Kusne et al, 1988, Medicine; 67:132
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Case
• 36 year old Latina s/p cadaveric renal transplant (chronic GN) 2 years ago presents with SOB X 3 weeks and fevers to 39.8.
• Meds: Mycophenolate
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Pulmonary infections Approach
1. When is the patient presenting in relation to the transplant?
2. What is the degree of immunosuppression?3. What is the nature of the pulmonary infiltrates?4. What is the tempo of the pulmonary symptoms?5. What is the Aa gradient?
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Pulmonary infections Pattern of Infiltrates
• Segmental/lobar:– Common bacterial pathogens– Legionella
• Nodules:– Cryptococcus, Histo, Cocci– Aspergillus– Nocardia
• Diffuse:– PCP– CMV – HHV-6, HHV-7– RSV – Adenoviruses
• Non-infectious: Drug reactions (azathioprine, sirolimus), – PE
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Pulmonary infections Tempo
• Segmental/lobar:– Common bacterial pathogens: ACUTE – Legionella: ACUTE
• Nodules:– Cryptococcus, Histo, Cocci: SUBACUTE– Aspergillus: SUBACUTE– Nocardia: SUBACUTE
• Diffuse:– PCP: ACUTE– CMV: SUBACUTE– HHV-6, HHV-7: SUBACUTE– RSV: SUBACUTE– Adenoviruses: SUBACUTE
• Non-infectious: Drug reactions (Azathioprine): SUBACUTE, – PE: ACUTE
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Pulmonary infections Aa gradient
• Normal– TB– Common bacterial PNA– CHF
• Increased– PCP– CMV– RSV– HHV-6, HHV-7– Adenovirus
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CMV• Single most important pathogen in transplant
recipients
• >50% SOT patients affected by CMV
• Indirect effects: GNR/fungal infections, organ injury/rejection
• Risk factors: D+/R-, OKT3 rx, HHV-6 infection, cadaveric, lung/heart transplant >> kidney
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CMV Spectrum
CMV Ag/ PCR
Clinical
CMV infection + Asymptomatic
CMV “syndrome” + Fever, myelosuppression
CMV tissue invasive/ end‐organ disease
+ Pneumonia, GI, hepatitis, CNS, retinitis, nephritis, etc.
“Compartmentalized” CMV disease
‐ Pneumonia, GI, retinitis, CNS
Ljungman. CID. 2002
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CMV Diagnosis
• CMV shell vial culture: – Insensitive, late
• Antigenemia:– M.Ab detects pp65 early antigen in infected WBCs– Sensitive, specific, rapid – but need WBCs– Can detect CMV infection before disease onset by 1
week sooner than buffy coat shell vial culture
• PCR for CMV DNA:– Leukocyte PCR sensitivity > antigenemia– Not standardized
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CMV Diagnosis
• BAL– Low predictive value for positive CMV culture– Bronchoscopy cannot distinguish viral
shedding vs.. invasive disease
• Transbronchial lung biopsy
• CT Scan: Bad
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CMV Treatment
• GCV induction 5mg/kg BID x 14-21 days plus IVIG 500mg/kg QOD x 14-21 days
• But poor evidence:• Survival: 15% historical vs. 52% GCV + IVIG
• CMV-specific IVIG does not improve outcome
• Prevention: V-ACV, GCV po, V-GCV
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CMV Prophylaxis
Humar A et al, 2010, Am J Transplant. 2010 May;10(5):1228-37
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Polyomaviruses BK and JC
•Usually activated post- transplant•JC Virus
– PML– Presentation: Progressive
motor, sensory and cognitive deficits
– Rx: None
•BK Virus– Tubointerstitial nephritis– Risk factor:
Immunosuppression (esp. tacrolimus and mycophenolate)
– Rx: Reduce immunosuppression
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Fungus
Organ Transplanted Incidence (%)
Liver 7-42Pancreas 18-38Heart-Lung/Lung 15-36Heart 5-32Kidney 1-14
Singh, CID 2000:31 Paya, CID 1993:16
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Fungus Mortality
Risk group Fatality rate (%)Aspergillosis 45-54Non-Aspergillus hyalohyphomycetes 80
(Scedosporium spp, Fusarium spp)
Zygomycosis 100(Rhizopus, Mucor)
Phaeohyphomycosis 20
Candida 29
Hussain et al, CID 2003:37 Pappas, ICAAC 2003
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Fungus Trends
• 53 consecutive heart and liver transplant recipients with invasive mold infections in 11 centers 1998-2002
• Spectrum of fungus is changing dramatically:– ↓
Aspergillus infections 70% • prior studies in 1990s: 98%
– ↑
Non-Aspergillus mold infections 30%• Scedosporium, Fusarium, Zycomycetes,
Phaeohypomycetes• prior studies in 1990s: 2%
Singh et al, Transplantation 2002:73
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Broad and hyposeptate, with wide angle branching
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Phaeohyphomycosis
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Kontoyiannis et al, JID, 2005
Voriconazole available
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Fungus Diagnosis
• Patient characteristics• Radiology• Microbiology• Non-culture tests
– Galactomannan (Antigen) assay – PCR
• Pathology: the best way to demonstrate invasive disease
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“Halo sign”
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Althoff Souza et al, J Thor Imag, 2006
Crescent sign
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Fungus Galactomannan
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Dismukes WE, Clin Infect Dis 2006; 42:1289-96
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0 14 28 42 56 70 840.0
0.2
0.4
0.6
0.8
1.0Amphotericin B +/- OLAT (10)
Voriconazole +/- OLAT (77)
Fungus Therapy
Number of Days of Treatment
Prob
abili
ty o
f Sur
viva
l
Hazard ratio = 0.59 ( 95% CI 0.42-0.88)
Survival at wk 12Voriconazole ± OLAT 70.8%AmB ± OLAT 57.9%
Herbrecht et al. NEJM 2002: 347OLAT: Other Licenced Antifungal Therapy
N=277, SOT=9
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Untreated MFG
RAV MFG/RAV
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Case•Patient with DKA, renal failure, immunosuppressed•Black necrotic lesions of nose with invasion•Broad, branching, non- septate hyphae•Almost 100% mortality in immunosuppressed•Rx: Surgery and Ampho•Diagnosis?
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50 y.o. DKA with necrotic palate
1. Actinomycosis2. Aspergillus3. MRSA4. Mucormycosis5. Norcardia
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50 y.o. DKA with necrotic palate
1. Actinomycosis2. Aspergillus3. MRSA4. Mucormycosis5. Nocardia
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Case
62 y/o female who is one year s/p double lung transplant for IPF
3 weeks of increasing LUQ discomfort
SOB and cough
Low grade fevers
courtesy Steve Hays MD
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Bronchoscopy revealed nodular polypoid lesions
courtesy Steve Hays MD
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62 y.o. female s/p lung tx Dyspnea and cough
1. Actinomycosis2. Aspergillus3. MRSA4. Mucormycosis5. Nocardia
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62 y.o. female s/p lung tx Dyspnea and cough
1. Actinomycosis2. Aspergillus3. MRSA4. Mucormycosis5. Nocardia
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Nocardia
– 4% renal transplants– Lung (90%), brain
(50%)– Skin, bone– Rx: TMP/SMX,
minocycline, imipenem
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Case
• 37 year‐old woman s/p cadaveric kidney and pancreas transplant 6 weeks prior to
admission presented with fever
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What is this in blood?
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37 y.o. kidney‐pancreas tx Fever
1.
Bacteria2.
Virus
3.
Parasite4.
Spirochete
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37 y.o. kidney‐pancreas tx Fever
1.
Bacteria2.
Virus
3.
Parasite4.
Spirochete
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Trypanosoma cruzi trypomastigotes on a peripheral
blood smear from a patient aged 37 yearsMMWR March 15, 2002 / 51(10);210‐2
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Case
• U.S. Centers for Disease Control contacted• Nifurtimox x 4 months• Donor investigation: immigrant female from Central
America• Two other organ recipients from same donor
(kidney, liver) found to be infected with T. cruzi (hemoculture)
• Outcome: recurrent reactivation several weeks after completing therapy; died of Chagas myocarditis
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Trypanosoma cruzi and vector
Courtesy Patricia Doyle, PhD, UCSF
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Donor derived infections
Disease Transmission Advisory Committee (DTAC)
Transplant Transmission Surveillance Network (TTSN)
UNOS Patient Safety Specialist:Shandie
Covington, Kimberly Parker &
Kimberly Taylor(804) 782‐4929
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Infections Donor Reports Confirmed Recipients
Recipient Deaths
Hepatitis C 9 4 1Tuberculosis 8 3 2HIV 7 4 1Chagas 6 3 2Hepatitis B 6 0 0Toxoplasmosis 6 4 0West Nile Virus 6 1 0Histoplasmosis 4 2 0Bacteremias 3 2 2Candidemia 3 3 2EBV 3 0 0Cryptococcus 2 1 0Schistosomiasis 2 1 0Strongyloides 2 1 1Syphilis 2 0 0Bacterial Meningitis 1 0 0Cytomegalovirus 1 0 0HTLV 1 0 0Influenza A 1 0 0LCMV 1 4 3Legionella 1 1 0Listeria 1 0 0Mycotic Aneurysm 1 0 0RMSF 1 0 0S. aureus in transport fluid 1 0 0Zygomycetes 1 0 0
2005-2007 Courtesy Mike Ison, MD, MS
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Take home points
• Opportunistic infections in transplant can occur late
• SOT recipients may not present with normal signs and symptoms of infection
• CMV disease is the most important infection in SOT recipients
• Donor derived infections should be considered in recipients with unexplained
illness
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U.S. Children Getting Majority Of Antibiotics From McDonald's Meat
WASHINGTON, DC—According to a Department of Health and Human
Services report released Monday, McDonald's meat from antibiotics‐injected
livestock is now the primary source of antibiotics for U.S. children,
particularly for uninsured youths…"Unfortunately, some children still fall through the cracks in our health‐care
system, but luckily, McDonald's is there to lend a helping hand," the
Secretary of Health and Human Services said at a press conference
announcing the findings. "So even if a child's family has no health insurance
and can't afford medicine, virtually anyone can afford a delicious 99‐cent Big
Mac with pickles, cheese, and a heapin' helpin' of [the antibiotic]
quinupristin‐dalfopristin." “All children tend to eat at McDonald's a lot,
which is a good thing. If you think about it, where else are these kids going to
get their fluoroquinolone?"