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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