training on clinical care of hiv, aids and opportunistic infections unit 9 fever and lymphadenopathy
TRANSCRIPT
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Unit 9
Fever and Lymphadenopathy
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Learning Objectives
• Describe the differential diagnosis and evaluation of an HIV positive adult with fever
• Apply therapeutic options for HIV infected adults with fever
• Describe evaluation and management of HIV infected persons with lymphadenopathy
Unit 9: Fever and Lymphadenopathy, Slide 2
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Definitions: Persistent Fever
• Applies to outpatient with HIV being seen by a nurse in a Level I primary care clinic• Temperature > 37.5°C• At least 2 weeks duration• Persistent or recurrent• No other significant signs/symptoms
Republic of Namibia, MoHSS Guidelines for the Clinical Management of HIV and AIDS, 2001.
Unit 9: Fever and Lymphadenopathy, Slide 3
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Pyrexia of Unknown Origin (PUO)
• Phrase created in the 1960’s to describe patients with fever lasting > 3 weeks and that remains unexplained despite > 1 week of investigation in hospital
• Now 4 categories:• Classical• HIV-associated• Immunosuppression-associated• Nosocomial
Unit 9: Fever and Lymphadenopathy, Slide 4
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Classic Pyrexia of Unknown Origin
IMAGINE:
Infections
Medication
Auto-immune disorders
Granulomatous conditions
Idiopathic
Neoplasia
Endocrine disordersUnit 9: Fever and Lymphadenopathy, Slide 5
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Definitions: HIV-Associated PUO
• Applies to an HIV infected patient undergoing evaluation by a doctor for fever
• Temperature > 38°C• Outpatients
• ≥ 3 weeks duration
• Inpatients• ≥ 3 days in hospital
• No diagnosis made in this time
Source: Mandell, G.L., J.E. Bennett, R. Dolin. Principles and Practice of Infectious Disease. Sixth Edition, 2004. Elseiver, Inc. www.elseiver.com
Unit 9: Fever and Lymphadenopathy, Slide 6
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
HIV-Associated PUO
• Infections and malignancies are most common
• Auto-immune (connective tissue) conditions are rare in patients with severe immunosuppression
• Differential varies by CD4 cell count
Unit 9: Fever and Lymphadenopathy, Slide 7
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
PUO: Conditions Occurring in Namibia At Any CD4 Count
• Bacterial Infection• TB• Bacterial pneumonia• Urinary tract infection• Sinusitis• Salmonella (enteric fever)• Borrelia• Brucella• Intra-abdominal, intra-hepatic or other hidden
abscess
Unit 9: Fever and Lymphadenopathy, Slide 8
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
PUO: Conditions Occurring in Namibia At Any CD4 Count (2)
• Parasitic Infection• Malaria• Trypanosomiasis
• Viral Infection• Viral hepatitis, Primary HIV infection
• Malignancy
• Alcoholic hepatitis
• Drug reactions
Unit 9: Fever and Lymphadenopathy, Slide 9
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
HIV-Associated PUO: Conditions in Southern Africa at Low CD4 Counts
• CD4 < 200• Pneumocystis pneumonia (PCP), Kaposi’s
Sarcoma, Lymphoma
• CD4 < 100• Cryptococcus, Toxoplasma, Histoplasma,
MOTT (M. kansasii)
• CD4 < 50• MOTT (M. avium complex), Cytomegalovirus
(CMV)
Unit 9: Fever and Lymphadenopathy, Slide 10
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Infections
Mycobacteria 37%
CMV, HSV, other viruses 18%
Pneumocystis pneumonia 13%
Cryptococcus, other fungal 10%
Bacteria 5%
Parasitic 3%
Malignancies
Lymphoma 7%
Kaposi’s sarcoma 1%
Other
Drug Fever 3%
Castleman’s disease 1%
HIV-Associated PUO (Study from New York City, USA)
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Slide 11
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Principles in Managing HIV-Associated Fever
• Confirm HIV infection if not already done• Perform clinical and laboratory staging• Consider local endemic infections• Look for focal organ involvement that can
provide clues to the diagnosis• Provide empiric therapy if needed as the
evaluation proceeds
Unit 9: Fever and Lymphadenopathy, Slide 12
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Persistent Fever in Primary Care Setting
• Perform a history and physical exam• Refer severely ill patients immediately
• Antipyretic therapy
• Assure proper hydration
• If no cause is apparent. Do a rapid test and treat as indicated• For malaria: in an endemic area during
malaria season
Unit 9: Fever and Lymphadenopathy, Slide 13
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Empiric Therapy Options in Primary Care Setting • Blood smear negative and patient not on CTX
prophylaxis• Cotrimoxazole 80/400 two tablets bd for 5 days.• Treats many bacterial causes
• On CTX with respiratory symptoms• Amoxycillin 500 mg 8 hourly for 5 days
• On CTX with GI symptoms or urinary tract symptoms• Nalidixic acid 1000 mg QID for 5 days
Unit 9: Fever and Lymphadenopathy, Slide 14
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
No Improvement with Empiric Antibiotics
• Refer to medical doctor for history and physical exam
• Examinations• FBC• CD4 cell count• Urine dipstick• Blood Culture• Sputums for AFB• Malaria/Borrelia smear• Consider chest x-ray now if seriously ill• Consider stool exams in case of diarrhea
Unit 9: Fever and Lymphadenopathy, Slide 15
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Initial Work-up Inconclusive
• Repeat history and physical exam• Retinal exam• Chest X-ray if not yet done• Liver chemistry tests• Consider repeat malaria/borrelia smear• Consider repeat blood culture, with anaerobic
and mycobacterial cultures• Consider CSF examination• Consider abdominal ultrasound
Unit 9: Fever and Lymphadenopathy, Slide 16
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Dry-Season Bacteremia in Malawi
70 (30%) of 233 adult patients with HIV admitted for fever during the dry season in Lilongwe had a positive blood culture.
Organism %
S. pneumoniae 33%
M. tuberculosis 28%
Salmonella 6%
Other bacteria 4%
Cryptococcus 2%
MOTT 2%Source: Archibald L et al. J Infect Dis. 2000;181:1414.
Slide 18
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Wet-Season Bacteremia in Malawi
67 (36%) of 238 adult patients with HIV admitted for fever during the wet season in Lilongwe had a positive blood culture.
Organism Percent of positive blood cultures
Non-typhi Salmonella 41%
M tuberculosis 19%
Cryptococcus 9%
Source: Bell M et al. Int J Infect Dis. 2001;5(2):63-9.
Slide 19
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Abdominal Ultrasound in AIDS
Comparison of results among adults referred for U/S in Congo and Zambia
AIDSn=900
HIV-n=900
Splenomegaly 35% 24%
Hepatomegaly 35% 22%
Lymphadenopathy 31% 11%
Biliary Tract Abn 25% 12%
Gut Wall Edema 15% 5%
Ascites 22% 9%
Gallstones 23% 75%Source: Tshibwabwa, ET et al. Abdominal Imaging. 2000 May-Jun;25(3):290-6.
Slide 20
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Do Not Miss Common Treatable Conditions
• HIV-associated• Tuberculosis• Pneumocystis• Cryptococcosis• Toxoplasmosis
• Other• Malaria• Borrelia• Typhoid• Brucellosis• Endocarditis, urinary tract infection, abdominal abscess
Unit 9: Fever and Lymphadenopathy, Slide 21
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Tuberculosis
• Most common cause of undiagnosed chronic fever among Namibians with HIV
• Disseminated infection may not cause localised organ dysfunction
• Over time, clues may emerge that can be further evaluated• Miliary pattern on CXR• Adenopathy• Pleural, pericardial disease• Meningitis• Infiltrative liver disease• Anaemia
Unit 9: Fever and Lymphadenopathy, Slide 22
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Tuberculosis (2)
• Typical abnormalities in body fluids are strongly suggestive of TB (CSF, pleural, peritoneal fluid)
• Beware: CSF may be normal in TB meningitis occurring in HIV patients
• Ziehl-Nielson stain and cytology or histology of aspirate or biopsy (including bone marrow) may provide evidence of TB
Unit 9: Fever and Lymphadenopathy, Slide 23
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Tuberculosis (3)
• A decision to give empiric treatment for TB• Is not just a therapeutic trial but a
commitment to provide a course of therapy• Requires follow-up and patients who do not
respond require further evaluation
Unit 9: Fever and Lymphadenopathy, Slide 24
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Pneumocystis Pneumonia
• Some patients may not complain of dyspnea• Count respiratory rate at rest and with
exercise
• Chest sounds may be normal• Interstitial, not alveolar, disease
• Chest x-ray may initially be normal• The disease is progressive without
therapy, so re-evaluation will lead you to suspect the diagnosis
Unit 9: Fever and Lymphadenopathy, Slide 25
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Cryptococcus
• May present as an interstitial pneumonia before, or at the same time as, meningitis
• Severely immunosuppressed persons often do not have meningismus
• No stiff neck
• May have only fever, headache, perhaps change in mental status or cranial nerve findings
Unit 9: Fever and Lymphadenopathy, Slide 26
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Cryptococcus (2)
• Have a low threshold for performing a lumbar puncture
• Always perform India ink exam on CSF• Request lab to send for cryptococcal Ag if India ink
negative• In Durban 17% of AIDS patients with Cryptococcal
meningitis had CSF that was normal except for the presence of yeast cells
• Effective therapy is widely available in Namibia and underused
Unit 9: Fever and Lymphadenopathy, Slide 27
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Toxoplasmic Encephalitis
• May or may not be associated with fever
• Focal neurologic deficit may be subtle
• Progression of focal neurologic findings over days to weeks suggestive
• Clinical response to empiric therapy is usually evident within 2 weeks
Unit 9: Fever and Lymphadenopathy, Slide 28
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Malaria and HIV
• HIV-1 infection is associated with an increased frequency of clinical malaria and parasitaemia
• Incidence rates of P. falciparum clinical disease increase as CD4 counts decrease
• Genotyping shows the infections are new, and not recrudescence of previous infection
Unit 9: Fever and Lymphadenopathy, Slide 29
Malaria treatment
• Coartem®• Combination tablet of
• Artemether (20 mg) – fast acting and
• Lumefantrine (120 mg) – slow prolonged action
• Active against chloroquin resistant falciparum
• Most common side effects
• GI symptoms, headache, sleep disturbance, dizziness, myalgia or arthralgia, palpitations, cough
Unit 9: Fever and Lymphadenopathy, Slide 30Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Coartem
• Doses are weight-banded • 6 doses in 3 days:
• First dose stat, repeat in 8 hours • Same dose bd on days 2 and 3
• ≥35 kg, 4 tablets/dose
• Absorption improved if taken with food
• Not currently approved for use in pregnant women and children < 6 months old
Unit 9: Fever and Lymphadenopathy, Slide 31
Borrelia
• Tick borne relapsing fever caused by many species of Borrelia
• 3-day long episodes of high fever with rigors and severe headache recur at 7 day intervals with splenomegaly (41%), hepatomegaly (17%) and rash (28%)
• Spirochetes seen on blood smear
• Tetracycline or erythromycin 500 mg 4x daily for 5-10 days• Doxycyline 100 mg bd for
5-10 days• IV penicillin/ceftriaxone
for meningitis
Unit 9: Fever and Lymphadenopathy, Slide 32Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Typhoid and Other Salmonella Bacteremia
• More common in rainy season in neighboring countries; maybe infrequent in Namibia
• Fever without or with GI symptoms, transient rash, splenomegaly
• Leucopaenia common, blood cultures confirm diagnosis
• Treatment: flouroquinolones, chloramphenicol• Local salmonella species resistant to ampicillin and
amoxycillin• ceftriaxone is active but rarely used for this in
Namibia
Unit 9: Fever and Lymphadenopathy, Slide 33
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Brucellosis
• Acquired from infected cattle and dairy products
• Chronic fever, sweats, fatigue, pain, adenopathy (20%), hepatosplenomegaly (20-30%), epididymitis (20%), mild pancytopenia
• Diagnosed with blood or bone marrow culture and antibody tests
• Treatment• Doxycyline 200mg/d with rifampicin 600mg/d for 6 weeks• Doxycycline for 6 weeks with streptomycin IM daily for 2-3 wks
Unit 9: Fever and Lymphadenopathy, Slide 34
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Empiric Therapy of Bacterial Infections
• Respiratory tract & Pneumonia• Not very sick: high dose amoxycillin,
azithromycin, erythromycin, tetracycline• Very sick: high dose penicillin with
gentamicin or cefuroxime with azithromycin
• Meningitis• Ceftriaxone or high dose penicillin +
chloramphenicol
Unit 9: Fever and Lymphadenopathy, Slide 35
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Empiric Therapy of Bacterial Infections (2)
• Skin and soft tissue (suspected S. aureus)• Cloxacillin, erythromycin, cephalothin
• Bone and joint (suspected S. aureus)• Clindamycin or cloxacillin,
• Urinary tract infection• Nitrofurantoin• Nalidixic acid• Not improving or very sick: ciprofloxacin +/-
gentamicin
Unit 9: Fever and Lymphadenopathy, Slide 36
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Empiric Therapy of Bacterial Infections (3)
• Bacillary dysentery• Nalidixic acid, ciprofloxacin • Metronidazole if amebiasis or C. difficile
suspected
• Intra-abdominal abdominal abscess or peritonitis• Ampicillin, gentamicin, metronidazole
Unit 9: Fever and Lymphadenopathy, Slide 37
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Empiric Therapy of Bacterial Infections (4)
• Endocarditis• Native valve: penicillin and gentamicin• Drug injector: ciprofloxacin or cephalothin +
gentamicin
• Sepsis or bacteremia• Ampicillin and gentamicin
OR• Cefuroxime and gentamicin
• Neutropenic fever• Pipiracillin/tazobactam with gentamicin
Unit 9: Fever and Lymphadenopathy, Slide 38
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Generalised Lymphadenopathy: Differential Diagnosis
• Acute Retroviral Syndrome
• HIV associated Persistent Generalised Lymphadenopathy • not a febrile illness
• Secondary syphilis
• EBV or CMV viral infection
• Autoimmune disease• Unusual in immunosuppressed patients
Unit 9: Fever and Lymphadenopathy, Slide 39
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Localised Lymphadenopathy: Differential Diagnosis• Acute Bacterial Infection
• Nodes draining a localised bacterial infection• Sexually Transmitted Infection
• Chancroid• Lymphogranuloma venereum
• Chronic Infection• Tuberculosis, MOTT• Histoplasma• Immune Response Inflammatory Syndrome
• Cancer• Lymphoma• Kaposi’s Sarcoma• Metastases
Unit 9: Fever and Lymphadenopathy, Slide 40
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Localised Adenopathy
• Evaluation of localised adenopathy not due to a local draining infection (pharynx, skin, limb), STI, or obvious KS • Needle aspiration of suppurating node
for drainage and diagnosis• Rarely surgical drainage is needed
• Needle aspiration for cytology and AFB smear
• Biopsy
Unit 9: Fever and Lymphadenopathy, Slide 41
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Yield of Needle Aspiration for Diagnosis: HIV-Related Lymphadenopathy - Zambia
Source: Patil and Bern. Journal of Clinical Pathology 1993;46:806-9.
Final Diagnosis Number (%) Sensitivity
Tuberculosis 130 (65%) 79%
HIV adenopathy 47 (24%) 66%
Kaposi’s sarcoma 18 (9%) 29%
Lymphoma 3 (1%) 56%
Other 3 (1%)
Total 200
Slide 42
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Key Points: Fever
• First rule-out malaria
• Attempt antibacterial empiric therapy
• Tuberculosis is the most common cause (but not the only cause) of pyrexia of unknown origin in HIV+ patients in Southern Africa
Unit 9: Fever and Lymphadenopathy, Slide 43
Training on Clinical Care of HIV, AIDS and Opportunistic Infections
Key Points: Adenopathy
• Generalised adenopathy may be Primary HIV, PGL, another viral infection, secondary syphilis, or an auto-immune disease
• Localised adenopathy usually has a specific cause and needs to be fully evaluated
Unit 9: Fever and Lymphadenopathy, Slide 44