Travel Medicine Pearls: Malaria, Diarrhea, and Vaccines with Dr. Boghuma Titanji

Travel Medicine Fundamentals

• 🎯 Preventing infections is a primary goal for travelers, but it's crucial to consider the bigger picture beyond just infectious diseases.
• ⚠️ Mortality in travelers is more commonly due to non-infectious causes like heart disease, accidents, and injuries, rather than infections.
• 🗺️ Key resources for travel health include the CDC Yellow Book, UK's Fit for Travel, and the WHO website for outbreak information.

Infectious Disease Prevention

• 🦟 Malaria prophylaxis is essential for travelers to endemic areas, even for those who previously lived there, as immunity can be lost after six months abroad.
• 🦠 Plasmodium falciparum is the most dangerous malaria subtype, prevalent in Sub-Saharan Africa and Southeast Asia.
• 💊 Malaria prophylaxis options include daily (doxycycline, atovaquone-proguanil) and weekly (mefloquine, chloroquine) medications, each with specific considerations and contraindications.
• 🚫 Doxycycline is a good option for hikers due to potential tick exposure but requires counseling on sun exposure. Atovaquone-proguanil treats the liver stage and can be used for terminal prophylaxis but requires G6PD deficiency testing.
• ⚠️ Mefloquine and chloroquine are weekly options, but chloroquine has resistance issues. Mefloquine can have neuropsychiatric side effects, including severe nightmares.
• 🤒 Fever in a returning traveler should be considered malaria until proven otherwise.

Traveler's Diarrhea and Other Risks

• 🤢 Street food and raw foods like ceviche can be a source of traveler's diarrhea and other gastrointestinal illnesses.
• 💧 Using bottled water for drinking, brushing teeth, and rinsing food is recommended to avoid exposure to local microorganisms.
• 💧 For traveler's diarrhea, asithromycin is now preferred over ciprofloxacin. Treatment depends on severity: mild cases may not require antibiotics, moderate cases might, and severe cases require antibiotics and aggressive rehydration.
• 🥤 An oral rehydration solution can be made with water, salt, and sugar, or by adding salt to a sports drink like Gatorade.

Vaccines and Specific Considerations

• 💉 Routine vaccines like tetanus, Hepatitis A, and Hepatitis B should be administered by PCPs and are typically covered by insurance.
• 💛 Yellow fever vaccine is required for travel to some countries and can only be given at licensed clinics due to significant side effect risks, especially in older individuals.
• 🦟 Dengue vaccines are being developed, with new ones expected to cover all serotypes, as current ones may be discontinued.
• 💊 For patients with high risk of malaria or poor adherence, artemether-lumefantrine (Coartem) can be prescribed for treatment in hand.
• 🩺 Continuous glucose monitors (CGMs) help identify patterns and target hyperglycemia by addressing fasting blood sugar and hypoglycemia, while PCSK9 inhibitors are potent for lowering LDL, often used for statin-intolerant patients or those with familial hyperlipidemia, primarily for secondary prevention.