Investigation into Hantavirus Outbreak in Ushuaia, Argentina

In Ushuaia, Argentina, investigators are on a quest to uncover the source of a hantavirus outbreak linked to a cruise last month. They set traps for rodents in the nearby forests to check if the virus might be present in an area that was previously believed to be safe.

Dressed in protective gear, the scientists checked about 150 traps they had placed the night before. They collected dead rats, which were then placed in plastic bags for transport to a temporary lab where blood samples would be drawn.

This rat-trapping operation signifies the beginning of a broader investigation into the contagion responsible for infecting passengers of the MV Hondius, which has resulted in three deaths and affected several others. Health officials are now urgently trying to trace anyone who came into contact with those infected.

Despite the muddy conditions, the team, backed by the state’s Malbrán Institute, did not take questions from reporters. They plan to continue their trapping efforts for the next few days and will eventually bring their samples back to Buenos Aires for testing, which could take a month. However, there hasn’t been much information shared about the findings.

Spokesperson Martín Alfaro from the local health ministry confirmed that they captured the expected number of rodents.

This investigation comes nearly two weeks after the Health Ministry announced the team would head to Ushuaia, a well-known tourist destination that serves as a launching point for Antarctic expeditions.

Concerns About the Investigation’s Findings

Interestingly, hantavirus has not been documented in Ushuaia or the surrounding Tierra del Fuego region before. Provincial officials in Patagonia, where hantavirus is more common, argue that the first known victims of this outbreak—two Dutch birdwatchers—did not travel in a time frame that would typically lead to their infection.

These tourists concluded a trip across Chile and Argentina in late March, enjoying time in Ushuaia before setting sail on April 1.

Local health authorities have rejected the initial hypothesis proposed by national officials that the couples’ visit to a landfill was the infection’s origin. Both have since passed away, creating further complications for investigators aiming to track down where they might have contracted the virus.

The Andes virus, related to hantavirus, is generally spread through contaminated air connected to the long-tailed pygmy rice rat, known locally as the colilargo. While the colilargo is not found in Tierra del Fuego, a related subspecies exists in the Ushuaia area, which raises questions about the virus’s potential presence.

Local health authorities are skeptical that their tourism-dependent province is at fault for the outbreak. They are, however, invested in learning if hantavirus exists at all, particularly in light of climate change. The researchers are looking in two specific regions where the colilargo subspecies is known to thrive.

Alfaro mentioned, “It’s crucial to rule out any possibility of transmission happening here.”

In recent years, Argentina has seen a spike in hantavirus cases, which scientists believe is closely linked to the expanding habitat of the colilargo due to changing climate conditions and human development.