Suspected Hantavirus Outbreak on Atlantic Cruise Ship Results in Three Deaths

A suspected outbreak of hantavirus aboard the MV Hondius cruise ship has resulted in the deaths of three individuals and the illness of at least three others, according to the World Health Organization (WHO) and South Africa's Department of Health. The vessel, operated by a Dutch company, is currently off the coast of Cape Verde, where local authorities have yet to permit disembarkation.

The MV Hondius departed from Ushuaia, Argentina, on March 20, with planned stops in Antarctica and the Falkland Islands, before heading to Spain's Canary Islands. The first fatality occurred at sea, with the deceased's spouse passing away subsequently in South Africa. A British national, also affected, was airlifted to Johannesburg for intensive care. Two symptomatic crew members remain on board, awaiting potential evacuation. Approximately 150 passengers and 70 crew members were on the ship during the outbreak.

Hantaviruses are primarily transmitted to humans through contact with infected rodents or their excreta. The disease can lead to severe respiratory or renal syndromes and is rarely transmissible between people. Symptoms often begin with fever, muscle aches, and fatigue, progressing to coughing and shortness of breath as the lungs fill with fluid. The fatality rate for hantavirus pulmonary syndrome is approximately 35%.

The WHO is conducting virus sequencing and supporting investigations and medical efforts. South African authorities are performing contact tracing, while Cape Verdean officials have yet to allow disembarkation.

Preventive measures include avoiding contact with rodent habitats, sealing homes to prevent rodent entry, and using protective equipment when cleaning areas contaminated by rodent droppings. There is currently no specific treatment or vaccine for hantavirus infections; management focuses on supportive care.