Investigation of Hantavirus Case on Tristan da Cunha
A potential hantavirus case is being examined on the remote island of Tristan da Cunha. This comes as a follow-up to an outbreak linked to the cruise ship MV Hondius. Fortunately, two passengers from Singapore aboard the ship have tested negative for the virus.
Efforts are in place to track the movements of the Hondius, and authorities are looking into both passengers and crew to determine who might have been exposed. It’s important to note that hantavirus has a long incubation period—typically between six to eight weeks—meaning an individual could be infected and not realize it unless tested.
The strain of concern, known as the Andes strain, is unique because it can spread through human contact after its presence was confirmed on the ship following a stop in Argentina. Other strains of hantavirus are typically transmitted via pest feces.
The UK Health and Safety Agency (UKHSA) has reported that the case on Tristan da Cunha involves a British man who was on the Hondius. Tristan da Cunha is quite isolated, with a population of around 200, situated midway between South America and South Africa.
In a letter to local officials, Stephen Doughty, Minister for British Overseas Territories, expressed concern for those on the island who are hospitalized with suspected hantavirus infections, as well as their quarantined spouses.
Doughty mentioned, “We also know there are four island residents currently on the ship, which is on St. Helena Island.” St. Helena is the nearest inhabited island to Tristan da Cunha, though a boat ride there takes about six days. The Hondius visited St. Helena on April 24, and seven British passengers disembarked. Out of those, four remain on St. Helena, two returned to the UK to self-isolate, and one was tracked by UKHSA to a location outside the UK.
Governor Nigel Phillips acknowledged the community’s “calm and measured response” to the outbreak and advised caution against misinformation spreading on social media. He noted that the situation has garnered a lot of attention online, which can lead to misunderstandings, referencing a recent incident involving Jonathan the Tortoise, an elderly giant tortoise whose rumored death required official clarification.
The two Singaporean passengers on the Hondius, both in their sixties, were isolated and tested. While one man has received a negative result, he will remain quarantined for 30 days and monitored for an additional 15 days due to his research background in hantaviruses. They had disembarked alongside a woman who was experiencing gastrointestinal issues and later died in Johannesburg, after which her hantavirus infection was confirmed.
Singapore’s Communicable Diseases Authority (CDA) has stated that the risk to the general public remains low. Currently, four individuals aboard the Hondius have been confirmed infected, though the suspected case from Tristan da Cunha is not among them. So far, three have died, and one is in critical condition, with other potential infections under investigation. The World Health Organization (WHO) is expected to provide updates soon.
The WHO has asserted that this outbreak is unlikely to escalate into a pandemic like COVID-19, noting that the Andean strain of hantavirus tends to spread slowly and requires close contact for transmission.
As many as 12 countries are collaborating on contact tracing efforts, including the United States and several European nations. In the U.S., five states are currently monitoring passengers from the Hondius, but state officials have reported no signs of infection among them.
President Trump expressed his hope that the situation is under control and mentioned a full report would come soon, thanking the team working on the matter.
Local and international health organizations are closely involved, and while some experts praise the response efforts, others have pointed out disorganization. Nevertheless, they acknowledge that the risk to the general public remains fairly low given the current circumstances.
