Dengue Is Spreading in Baja Sur: What Are the Warning Signs, and When Should You Get a Blood Test?

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Dengue is more common in Baja California Sur this fall than a year ago. At East Cape Health Center in Los Barriles, we want every household on the East Cape to know what is happening in our state, which warning signs mean you need medical care right away, how blood testing works, and how a quick weekly yard check helps protect your street.

What is happening in Baja Sur right now

Mexico's federal weekly dengue report (Panorama Epidemiológico de Dengue, week 40, data as of October 5, 2026) counts 325 confirmed cases in Baja California Sur this year, compared with 176 at the same point in 2025, an increase of about 85%. Relative to population, our state has the second-highest rate in Mexico, after Sonora. Most cases were recorded in Los Cabos (143), La Paz (107) and Comondú (71). Los Barriles is part of the municipality of La Paz. Every sample in the state typed this year showed dengue virus type 3.

More recent counts are higher. As of October 20, 2026, the local news outlet NBCS reported 403 cases in the state, citing national and state health reports, and state health officials have reported two deaths in Los Cabos (Tribuna de México, October 17, 2026). State epidemiology officials noted that the season peaks in October and that four municipal fumigation units in Los Cabos will keep working through December (Peninsular Digital, October 20, 2026).

How dengue usually starts

Dengue spreads through the bite of an infected Aedes mosquito, mainly Aedes aegypti. According to the World Health Organization (WHO), most people with dengue have mild symptoms or none at all. When symptoms appear, they usually start 4 to 10 days after a bite and last 2 to 7 days. The most common are high fever, headache, body aches, nausea and rash.

You can get dengue more than once, and WHO notes that people infected a second time face a higher risk of severe dengue. If you or someone in your family develops a fever, the US Centers for Disease Control and Prevention (CDC) advises seeing a health care provider, and mentioning if you have had dengue in an earlier season.

The warning signs of severe dengue

This list is worth keeping on the fridge. The CDC names five key warning signs:

Warning signs usually begin in the 24 to 48 hours after the fever has gone away (CDC).

Because of that timing, a person can seem to be getting better shortly before they need urgent care. Severe dengue is a medical emergency. If any warning sign appears, both the CDC and WHO advise seeking medical care immediately.

Caring for someone with a fever at home

WHO notes that there is no specific medicine that cures dengue. For mild illness, CDC guidance focuses on supportive care at home while watching for warning signs:

Rest as much as possible.
Drink plenty of fluids, such as water or drinks with added electrolytes.
Use acetaminophen (paracetamol) for fever and pain.
Do not take aspirin or ibuprofen. WHO explains that these medicines can increase the risk of bleeding.
Avoid mosquito bites while you are sick. During the first week of illness, the virus can pass from you to a mosquito (CDC), and from there to others in your home or neighborhood.

If you are unsure about a medicine or a dose, ask our team before taking it.

When does a blood test help?

If a doctor suspects dengue, a blood test can help confirm it, and the right test depends on the day of illness (CDC). During the first 7 days, recommended tests look for the virus itself or one of its proteins (NS1) along with an antibody test (IgM). After day 7, the antibody test is the main one, which is why it helps to tell the doctor which day the fever started. Low white blood cell and platelet counts are also common in dengue (CDC).

Our laboratory at the East Cape Health Center offers more than 1,000 tests on site, and many panels have same-day results, though timing depends on the test. Our doctor decides which tests you need; when your test is arranged, ask our laboratory how long the results will take.

Your yard, your street

Blue water-storage barrel, buckets, and stacked dishes on a sunny
coastal patio surrounded by cacti and flowering bougainvillea.

Fumigation kills adult mosquitoes, but not the larvae in standing water around our homes (Peninsular Digital, October 17, 2026). The state's message is "lavar, tapar, voltear y tirar" (wash, cover, turn over and throw out anything that holds water), and the CDC recommends doing this once a week:

Buckets, flower pot saucers, toys, birdbaths and trash cans: empty and scrub them, then turn them over or cover them.
Tinacos, aljibes (rooftop tanks and cisterns) and water barrels: keep them tightly covered so mosquitoes cannot enter.
Old tires: throw them out, or cover them so they cannot collect water.
Window and door screens: repair any holes.

This is a job for the whole street. Offer a hand if an older neighbor can no longer lift buckets or move tires, check any home you look after while its owners are away, and let health workers inspect water containers, apply larvicide or fumigate when announced for your area.

Calling us at night or visiting the clinic

If a warning sign appears, especially at night, call our 24/7 on-call line right away at +52 (624) 160-1997. A physician will give you urgent medical guidance by phone and decide with you on the next step (the East Cape Health Center is not staffed in person around the clock).

During clinic hours (Monday to Friday 08:00 to 17:00, Saturday 08:00 to 14:00, closed Sunday; hours may vary on holidays), message us on WhatsApp at +52 (624) 160-1997 or walk in when available.

Our team speaks English and Spanish, and if cost is a worry, ask about Social Assistance: after a private, case-by-case review, fees may be reduced or covered.

Need urgent medical guidance or a daytime appointment?

If a warning sign appears, call our 24/7 on-call physician line immediately at +52 (624) 160-1997. To book a visit during clinic hours, message us on WhatsApp at the same number. East Cape Health Center, Plaza Libertad, Local 11 to 15, Los Barriles.