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Fever in the
Tropics
Tom D. Thacher, MD
Department of Family Medicine
Mayo Clinic, Rochester, Minnesota
[email protected]
Fever as a Symptom
1.
2.
3.
4.
Malaria
Hypertension
Dyspepsia
Pulmonary
tuberculosis
5. Medical
examination
6. Upper respiratory
infection
7. Urinary tract
infection
8. HIV infection
9. Diabetes mellitus
10.PID
1/3 of all presentations in primary care
Disease Burden by Region
100%
80%
60%
Injuries
Non-communicable
Communicable
40%
20%
0%
Africa
SE Asia
Americas
Learning Objectives
1. Syndromic Approach
2. 8 Febrile Syndromes
Context of Fever
• Age
• Geography
• Season
• Duration of fever
• Malnutrition
• Immune status
• Exposures
Syndromic Approach
Empiric treatment
1. Fever alone
2. Neurologic
3.
Abdominal
Common
4. Pulmonary
Fever
Syndromes 5. Rash
6. Hemorrhage
7. Bone and joint
8. Gynecologic
8
Which of these is NOT in the top
five causes of death in children in
tropical countries?
A. Measles
B. Pneumonia
C. Typhoid
D. HIV
E. Malaria
38%
22%
19%
14%
6%
A.
B.
C.
D.
E.
Causes of Death in Children Under Age 5 Years in Africa
Other
18%
Malaria
21%
2/3 of all
child deaths
Perinatal
15%
Pneumonia
17%
Measles
8%
HIV
9%
Diarrhea
12%
1. Fever Alone
• Malaria
• Typhoid fever
• HIV
• Dengue
• Leptospirosis
• Rickettsia
• Relapsing fever
• Other viral illnesses
Malaria
Okie S. N Engl J Med 2008;358:2425-2428
Plasmodium falciparum
Symptoms of malaria
• Headache
• Pallor
• Severe hemolytic anemia
• Heart failure
• Cerebral malaria – impaired mental
status, convulsions, coma
• Labored breathing
• acidosis, heart failure
• Splenomegaly
Typhoid Fever
Typhoid
• Sustained high
fever, headache
• Apathy, psychosis
• Constipation,
abdominal pain
• Splenomegaly
• Positive blood
culture
www.worldortho.med.usyd.edu.au
Dengue
• Asia, So. America
• Marked myalgia, eye pain
• Rash
• ↓ WBC, ↓ platelets
Leptospirosis
• Rash
• Aseptic meningitis
• Clue: conjunctival injection
Rickettsia
• Fever, headache, and myalgia
• Clue: tick exposure, painless eschar
• African tick-bite fever, scrub typhus
Relapsing Fever
1. Fever alone
2. Neurologic
3.
Abdominal
Common
4. Pulmonary
Fever
Syndromes 5. Rash
6. Hemorrhage
7. Bone and joint
8. Gynecologic
8
2. Neurologic Syndromes
Fever, headache, altered mental
status, convulsions, coma
• Cerebral malaria
• Meningitis
• Encephalitis
• HIV
African Meningitis Belt
Encephalitis
• Rabies
• Japanese encephalitis
• West Nile encephalitis
• Trypanosomiasis (sleeping sickness)
HIV
• Chronic Meningitis: TB, cryptococcal
• Toxoplasmosis
• HIV dementia
1. Fever alone
2. Neurologic
3.
Abdominal
Common
4. Pulmonary
Fever
Syndromes 5. Rash
6. Hemorrhage
7. Bone and joint
8. Gynecologic
8
3. Abdominal Syndromes
Fever, abdominal pain
• Typhoid
• Infectious colitis: shigella, E. coli,
salmonella, campylobacter, ameba
• Amebic liver abscess
• Abdominal TB
• Appendicitis, pyelonephritis
• HIV
1. Fever alone
2. Neurologic
3.
Abdominal
Common
4. Pulmonary
Fever
Syndromes 5. Rash
6. Hemorrhage
7. Bone and joint
8. Gynecologic
8
4. Pulmonary Syndromes
Fever, cough, dyspnea
• Pneumonia
• Tuberculosis
• HIV
Causes of Death in Children Under Age 5 Years in Africa
Other
18%
Malaria
21%
Perinatal
15%
Pneumonia
17%
Measles
8%
HIV
9%
Diarrhea
12%
IMCI
Integrated Management of Childhood Illness
• Increased respiratory rate
• ≥60 if age < 2 mos.
• ≥50 if age 2-12 mos.
• ≥40 if age 12 mos. to 5 years
• Lower chest retractions
1. Fever alone
2. Neurologic
3.
Abdominal
Common
4. Pulmonary
Fever
Syndromes 5. Rash
6. Hemorrhage
7. Bone and joint
8. Gynecologic
8
5. Rash Syndromes
Fever and skin rash
• Measles
• HIV
• Dengue
• Other viruses
1. Fever alone
2. Neurologic
3.
Abdominal
Common
4. Pulmonary
Fever
Syndromes 5. Rash
6. Hemorrhage
7. Bone and joint
8. Gynecologic
8
6. Hemorrhagic Syndromes
Hematemesis, melena, epistaxis, petechiae,
purpura, puncture site bleeding
• Ebola, Lassa, Marburg
• Yellow fever
• Dengue
• Relapsing fever
1. Fever alone
2. Neurologic
3.
Abdominal
Common
4. Pulmonary
Fever
Syndromes 5. Rash
6. Hemorrhage
7. Bone and joint
8. Gynecologic
8
7. Musculoskeletal Syndromes
Fever with joint or bone pain
• Sickle cell disease
• Septic arthritis
• Osteomyelitis
• Pyomyositis
• Rheumatic fever
1. Fever alone
2. Neurologic
3.
Abdominal
Common
4. Pulmonary
Fever
Syndromes 5. Rash
6. Hemorrhage
7. Bone and joint
8. Gynecologic
8
8. Gynecologic Syndromes
Fever, pelvic pain, vaginal
discharge
• PID
• Tubo-ovarian abscess
• Postpartum endometritis
• Septic abortion
Treatment Limiting Factors
• Self treatment with OTC antibiotics
• Limited spectrum of antibiotics
• No health insurance
• Counterfeit drugs and adulteration
What is the
deadliest animal
in Africa?
no-pest.com
no-pest.com
20,000 deaths per year
news.nationalgeographic.com
800,000 deaths per year
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