Puerto Vallarta, Jalisco, July 22, 2026 – Puerto Vallarta has entered the wettest part of summer with dengue crews concentrating on neighborhoods where mosquito monitoring shows the greatest risk, even though confirmed infections remained unusually low early this year.
The 2026 municipal operation combines larval control, removal of breeding sites, vehicle and backpack insecticide applications, and household visits. When the campaign began April 16, the Eighth Health Region said about 30 state and municipal workers would use a heat map to prioritize zones showing stronger evidence of Aedes aegypti activity. Workers assigned to home visits were expected to carry an official badge with a QR code and wear a brown vest.
By June, Jalisco Health Secretary Héctor Raúl Pérez Gómez said positive ovitrap readings had increased in Puerto Vallarta and other parts of the state. Ovitraps collect mosquito eggs and help health teams identify where Aedes populations are rising before that growth appears in confirmed illness totals. The increase gave officials an early warning as rainfall created more places where water could collect around homes, vacant lots, businesses, and construction sites.
Jalisco reported 90 confirmed dengue cases and no deaths through epidemiological week 26. The state had recorded 56 cases through May 31. Puerto Vallarta had only two confirmed cases through epidemiological week 12 in early April, compared with roughly 30 to 40 at the same point in recent years. A newer municipal breakdown has not appeared in the public updates reviewed by Vallarta Daily, leaving the present local total unclear.
The current campaign differs from the four-round citywide fogging operation announced in June 2025. That earlier operation was scheduled to cross the municipality four times over four weeks and had treated more than 9,000 city blocks by the end of its second week. Rain interrupted some vehicle routes. Public information released in 2026 instead describes heat-map priorities and continuing neighborhood brigades, without a published timetable covering every colonia.
Fogging reduces adult mosquitoes in the treated area, but lasting control depends on removing eggs and larvae developing in standing water. The World Health Organization identifies elimination of egg-laying sites as the strongest preventive measure in places where Aedes mosquitoes are established. Water containers should be emptied, scrubbed, covered, or turned upside down each week because eggs can remain attached to container walls and survive dry periods.
That problem is especially visible in discarded tires. A Vallarta Daily report in May found that health crews had recovered tires during breeding-site work in Jardines del Bosque, Bosques del Progreso, and Magisterio. Local health officials requested a permanent disposal route because tires left in streets, streambeds, empty lots, and yards can hold rainwater long after a storm passes.
People can also reduce exposure by using repellent containing DEET, picaridin, or IR3535, installing intact window screens, and wearing clothing that covers more skin during peak mosquito activity. Aedes mosquitoes commonly bite during daylight hours.
Dengue may cause high fever, severe headache, pain behind the eyes, muscle or joint pain, nausea, vomiting, and rash. Severe abdominal pain, persistent vomiting, bleeding, rapid breathing, weakness, or cold and pale skin require urgent medical attention. The WHO advises paracetamol rather than aspirin or ibuprofen when dengue is suspected because those drugs can increase bleeding risk.
Jalisco residents seeking information about symptoms, prevention, or mosquito-control brigades can contact Línea Salud Jalisco at 33 3823 3220. Neighborhood schedules, when released, are expected through official Eighth Health Region channels.
