Question 1

What is dengue and why is it dangerous in Guatemala?

Accepted Answer

Dengue is a viral disease transmitted by the bite of Aedes aegypti mosquitoes. In Guatemala it's endemic — circulating year-round but peaking sharply during the rainy season (May to October). There are 4 serotypes of the virus (DEN-1, DEN-2, DEN-3, DEN-4). The danger isn't usually the first infection but a SECOND infection with a different serotype: that's when the risk of severe dengue (formerly called dengue hemorrhagic fever) increases sharply, and it can be fatal without prompt hospital care.

Question 2

What are the symptoms of dengue?

Accepted Answer

Symptoms appear 4 to 10 days after the mosquito bite: sudden high fever (over 39°C / 102°F), severe headache (especially behind the eyes — retro-orbital pain), severe muscle and joint pain (it's nicknamed 'breakbone fever'), nausea, vomiting, and a red rash that appears on day 3-5. Fever typically lasts 2-7 days. The MOST dangerous moment is when the fever drops (day 3-7): that's when warning signs of severe dengue can appear.

Question 3

What are the warning signs of severe dengue?

Accepted Answer

These signs are HOSPITAL EMERGENCIES: persistent vomiting (more than 3 times in 1 hour), severe abdominal pain, bleeding gums or nose, blood in stool or vomit, difficulty breathing, extreme drowsiness or restlessness, cold hands and feet, extreme paleness, dizziness when standing. If any of these appear — especially when the fever has just dropped — go DIRECTLY to an emergency room. Severe dengue can kill within hours if untreated.

Question 4

Should US travelers be worried about dengue in Guatemala?

Accepted Answer

Dengue is a real but manageable risk for travelers. Most US tourists who get dengue have mild illness and full recovery. Risk is highest in lowland departments (Petén, Izabal, Pacific coast) and during May-October rainy season. There's no vaccine recommended for most travelers (the one approved vaccine, Dengvaxia, requires prior infection). The CDC recommends standard prevention: DEET repellent (20-30%), long sleeves at dawn/dusk, air-conditioned/screened lodging when possible. If you develop high fever within 2 weeks of returning from Guatemala, tell your doctor about your trip — dengue isn't on most US doctors' radar by default.

Question 5

When should I go to the hospital with dengue?

Accepted Answer

Go for medical evaluation on the first day of unexplained high fever — so they can test you and teach you the warning signs. Go to EMERGENCY immediately if you have any warning sign (persistent vomiting, abdominal pain, bleeding, difficulty breathing, extreme drowsiness). Do NOT wait. Bring a companion. Young children, pregnant women, older adults, and people with diabetes/hypertension have higher risk of complications — lower the threshold for them.

Question 6

How do I prevent dengue?

Accepted Answer

The Aedes aegypti mosquito breeds ONLY in clean standing water in and around your house: water tanks, tires, vases, lids, gutters, toys, bottles, puddles. The best prevention is to ELIMINATE breeding sites: cover water tanks and barrels, empty vases every 3 days, flip tires, clean gutters. Also: use repellent with DEET 20-30% on exposed skin, screens on windows and beds (especially for children), long sleeves at dawn and dusk (when this mosquito bites most). The larvicide (abate) that MSPAS distributes for water tanks also works.

Question 7

Can you get dengue twice?

Accepted Answer

Yes — and the second time is more dangerous. There are 4 serotypes of the virus (DEN-1, 2, 3, 4). When you get sick with one, you become immune to THAT serotype for life, but the antibodies you produced can make a second infection with a different serotype MORE SEVERE (a phenomenon called 'antibody-dependent enhancement'). That's why most cases of severe dengue are second infections. If you've had dengue before, don't get complacent — keep preventing as much or more.

Question 8

What repellent works against the dengue mosquito?

Accepted Answer

The most effective per MSPAS, CDC and EPA: (1) DEET at 20-30% — gold standard, lasts 6-8 hours; (2) Picaridin at 20% — equally effective, no smell; (3) Oil of lemon eucalyptus (PMD) at 30% — natural option but shorter duration; (4) IR3535 at 20%. Apply AFTER sunscreen, NOT before. Reapply every 4-6 hours or after heavy sweating. For babies under 2 months do NOT use repellent — use a mosquito net. From 2 months to 12 years use DEET maximum 10% and never on face/hands. The Aedes aegypti bites MOST at dawn and dusk — those are the critical windows.

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Dengue Guatemala 2026: Symptoms, Prevention & What to Do During Rainy Season