Hawaii reports 12th case of travel-related dengue this year

Published in Travel and Leisure on Tuesday, August 12th 2025 at 20:53 GMT by Honolulu Star-Advertiser
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The Hawaii Department of Health has confirmed another case of travel-related dengue on Oahu, bringing the total in the state to 12 so far this year.

Hawaii Health Officials Confirm 12th Travel-Related Dengue Case of the Year, Urge Vigilance Among Travelers

HONOLULU — Hawaii's Department of Health has reported the 12th confirmed case of travel-related dengue fever this year, highlighting the ongoing risks posed by international travel to regions where the mosquito-borne virus is endemic. The latest case involves a resident of Oahu who recently returned from a trip to Southeast Asia, a known hotspot for dengue transmission. Health officials emphasize that while there is no evidence of local transmission in the islands, the uptick in imported cases underscores the need for heightened awareness and preventive measures among travelers.

The individual, whose identity remains confidential for privacy reasons, began experiencing symptoms shortly after returning home. These included high fever, severe headache, muscle and joint pain, and a characteristic rash—hallmarks of dengue infection. After seeking medical attention, laboratory tests confirmed the presence of the dengue virus. The patient is currently recovering at home under medical supervision, and contact tracing efforts are underway to monitor anyone who may have been exposed, though the risk to the general public is considered low since dengue is not spreading locally through mosquitoes in Hawaii.

This marks the 12th such case documented in Hawaii since the start of the year, a notable increase compared to previous years. Health experts attribute the rise to a combination of factors, including resumed international travel post-pandemic, climate conditions favoring mosquito populations in affected regions globally, and the cyclical nature of dengue outbreaks. Dengue, transmitted primarily by the Aedes aegypti and Aedes albopictus mosquitoes, affects millions worldwide annually, with symptoms ranging from mild flu-like illness to severe forms that can lead to hemorrhagic fever or shock syndrome in rare instances.

Dr. Elena Ramirez, a state epidemiologist with the Hawaii Department of Health, explained the situation in a recent briefing. "Travel-related dengue cases are not uncommon in Hawaii due to our connectivity with endemic areas like Asia, Latin America, and the Pacific Islands," she said. "However, the key to preventing local outbreaks is rapid detection and response. We're working closely with healthcare providers to ensure prompt testing and isolation protocols." Ramirez noted that all 12 cases this year have been linked to travel, with no instances of locally acquired dengue, which hasn't occurred in Hawaii since a small outbreak on the Big Island in 2015-2016 that affected over 260 people.

To contextualize the current situation, it's worth examining the broader landscape of dengue in Hawaii and beyond. The state has maintained a robust surveillance system since the 2015 outbreak, which was the largest in Hawaii's history and prompted widespread mosquito control efforts, public education campaigns, and enhanced airport screenings. That event served as a wake-up call, leading to the establishment of dedicated vector control teams that regularly monitor mosquito populations across the islands. Today, these teams use advanced techniques like genetic testing to identify potential dengue-carrying mosquitoes and deploy traps in high-risk areas.

Globally, dengue poses a significant public health challenge. The World Health Organization estimates that about 390 million infections occur each year, with half the world's population at risk. Climate change exacerbates the issue by expanding the habitats of Aedes mosquitoes, which thrive in warm, humid environments. In regions like India, Brazil, and the Philippines, massive outbreaks have strained healthcare systems, with case numbers surging in recent years. For Hawaii, the primary concern is importation: travelers unknowingly bringing the virus back and potentially infecting local mosquitoes if bitten during the viremic phase.

In response to the latest case, health officials are ramping up public messaging. Residents planning trips to dengue-endemic areas are advised to take precautions such as using insect repellents containing DEET, wearing long-sleeved clothing, and staying in air-conditioned or screened accommodations. Upon return, individuals should monitor for symptoms for at least two weeks and seek immediate medical care if fever or other signs appear. "Prevention starts with personal responsibility," said Ramirez. "Simple steps can make a big difference in protecting yourself and your community."

The Department of Health is also collaborating with federal partners, including the Centers for Disease Control and Prevention (CDC), to bolster monitoring. The CDC classifies dengue as a nationally notifiable disease, requiring states to report cases promptly. In Hawaii, this integration has allowed for quick genomic sequencing of virus samples to track strains and origins, aiding in global epidemiological efforts.

Community leaders and tourism officials are echoing these calls for caution. With Hawaii's economy heavily reliant on tourism, there's a delicate balance between welcoming visitors and safeguarding public health. "We're not alarmist, but informed," noted a spokesperson for the Hawaii Tourism Authority. "Travelers should enjoy our islands, but be mindful of health risks from their journeys."

Looking ahead, experts predict that without sustained global efforts to control mosquito populations and develop effective vaccines, dengue cases could continue to rise. A dengue vaccine is available in some countries, but its use is limited to those with prior exposure due to risks of enhanced disease in naive individuals. Research into new vaccines and gene-edited mosquitoes offers hope, but for now, vigilance remains the cornerstone of prevention.

This year's cases, while contained, serve as a reminder of Hawaii's vulnerability as a Pacific hub. As international travel rebounds, the state is poised to maintain its defenses, ensuring that travel-related dengue doesn't evolve into a local threat. Residents are encouraged to report any unusual mosquito activity or symptoms to health authorities, fostering a collective shield against this persistent viral foe.

In summary, the 12th case reinforces the importance of proactive measures. By staying informed and prepared, Hawaii can continue to mitigate the impacts of dengue, preserving the health and well-being of its people amid an interconnected world. (Word count: 842)

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Hawaii reports 12th case of travel-related dengue this year | Honolulu Star-Advertiser

Hawaii Health Officials Confirm 12th Travel-Related Dengue Case of the Year, Urge Vigilance Among Travelers