Full Breakdown
Argentine Rodent Investigation Seeks Source of Deadly Hantavirus Outbreak on Cruise Ship
5/20/2026, 3:10:03 AM
Outbreak, Field Response, and Key Data
In early April 2024, the cruise ship MV Hondius suffered a hantavirus outbreak that killed three passengers and left several others ill. Argentine investigators placed 150 live-capture traps in forests around Ushuaia, collected dead rodents, and sent the specimens to the Malbrán Institute in Buenos Aires for testing, expected to take up to one month. The operation spanned three nights.
Context, Epidemiology, and Institutional Actors
The Andes hantavirus is endemic to northern Patagonia, where infection usually follows inhalation of aerosolized excreta from the long-tailed pygmy rice rat (colilargo). The first identified victims of the MV Hondius outbreak were a Dutch couple who bird-watched in Ushuaia before boarding on 1 April. Provincial officials argue the couple’s exposure window does not match their itinerary and reject the hypothesis that the virus was acquired at an Ushuaia landfill. The Malbrán Institute leads the investigation in cooperation with the Tierra del Fuego health ministry; Martín Alfaro is the provincial health spokesperson.
Official Statements
Spokesperson Martín Alfaro said the trapping effort captured the expected number of rodents and noted that Tierra del Fuego has never conducted such testing before. He stressed that ruling out local transmission is a priority and that the province welcomes a broader investigation to determine whether hantavirus is present in the region.
Criticism, Opposition, and Conflicting Reports
Provincial officials contend the Dutch couple’s exposure likely occurred outside Ushuaia, questioning the relevance of local rodent testing. They also point out that the subspecies of colilargo found near Ushuaia has not been examined for hantavirus carriage, suggesting the current focus may overlook the true source. The national health ministry’s hypothesis links the outbreak to an Ushuaia landfill, while provincial authorities dispute that connection. No definitive evidence yet confirms that the local colilargo subspecies can transmit the virus, and test results from the trapped rodents remain pending.
Verbatim Quotes
- “They were able to capture what was expected,” — Martín Alfaro, Spokesperson, Tierra del Fuego
- “The province has never done this kind of testing before,” — Martín Alfaro, Spokesperson, Tierra del Fuego
- “It’s important that we rule out the possibility of transmission occurring here.” — Martín Alfaro, Spokesperson, Tierra del Fuego
- “Most clusters of the Andes virus, experts say, emerge from exposure to air contaminated with the feces and urine of the long-tailed pygmy rice rat known as the “colilargo” that runs rampant through the forests of northern Patagonia.” — Experts, epidemiologists
What’s Next
Rodent samples will be analyzed at the Malbrán Institute in Buenos Aires, with results expected within a month. Findings will guide public-health advisories, potential surveillance expansion in Tierra del Fuego, and further study of climate-driven rodent range shifts affecting hantavirus risk.
