An outbreak of a rodent-borne disease, likely linked to hantavirus, has led to three deaths and additional illnesses on a cruise ship. Hantaviruses have been identified for centuries, particularly associated with hemorrhagic fever and renal failure in the Eastern Hemisphere. In the U.S., a new group of hantaviruses emerged in the early 1990s, causing hantavirus pulmonary syndrome, which gained attention following a recent death related to the infection in New Mexico.
The outbreak is under investigation by the World Health Organization (WHO), which is conducting clinical tests and epidemiological studies, including virus sequencing. The disease spreads primarily through contact with rodent excretions, particularly when these materials are disturbed, but can occasionally transmit between humans. The CDC has tracked hantavirus since a notable outbreak in the 1990s, and experts believe that rural areas, particularly in New Mexico and Arizona, see more cases due to closer interactions between humans and rodents.
Symptoms typically start flu-like, progressing quickly to potentially severe respiratory issues, with initial signs appearing 1 to 8 weeks after exposure. There are no specific treatments for hantavirus infections, and mortality rates vary between different strains—hantavirus pulmonary syndrome has a 35% fatality rate, while hemorrhagic fever with renal syndrome ranges from 1% to 15%. Ongoing research seeks to uncover why some individuals develop severe disease while others do not. Preventative measures include minimizing contact with rodents and using protective gear when cleaning droppings, as vacuuming can aerosolize the virus.
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