Caso sospechoso que iba en el crucero da positivo por hantavirus: ya son 6 confirmados – BioBioChile

Health authorities have confirmed six cases of hantavirus linked to passengers of the MV Hondius cruise ship, triggering an international effort to locate and monitor individuals who may have been exposed to the virus. The outbreak has prompted a coordinated response across multiple countries, including Chile, Argentina, and Italy, as medical teams work to contain the spread of the Andes virus strain.

As of May 9, 2026, reports from BioBioChile and DW indicate that the number of confirmed infections has risen to six. The situation has escalated into a public health priority due to the specific characteristics of the virus involved and the mobility of the cruise ship’s passengers, many of whom disembarked at various ports before the outbreak was formally identified.

The outbreak has resulted in at least one fatality. According to reporting by EL PAÍS, Italian health officials are currently monitoring four individuals who were in close contact with a passenger who died from the virus. The monitoring is part of a broader effort to prevent further community transmission in Europe.

International Contact Tracing

The nature of cruise travel has complicated the medical response, leading to what officials describe as an international race to track passengers. Because the MV Hondius operated across multiple jurisdictions, health agencies are utilizing passenger manifests and port logs to identify everyone who shared space with the infected individuals.

The urgency of the search is driven by the incubation period of the virus and the risk that asymptomatic carriers may have already returned to their home countries. Authorities are working to notify potentially exposed passengers to undergo medical evaluations and PCR testing to confirm whether they have contracted the virus.

The Andes Virus and Transmission Risks

The cases are linked to the Andes virus, a specific strain of hantavirus prevalent in southern South America, particularly in Chile and Argentina. While most hantaviruses are transmitted to humans through contact with the urine, feces, or saliva of infected rodents, the Andes virus is noted for a rare and dangerous capability: human-to-human transmission.

This capacity for interpersonal spread makes the MV Hondius outbreak particularly concerning. In the confined environment of a cruise ship, the risk of the virus moving from one passenger to another is significantly higher than in typical hantavirus outbreaks, where rodent exposure is the primary vector.

The World Health Organization and investigators, including Tarik Jasarevic, are analyzing the transmission chain to determine how the virus first entered the ship’s population and how it spread among the passengers. The investigation aims to establish whether the primary infection occurred via environmental exposure in South America or through a direct human contact event.

Medical Evaluation and Diagnosis

Medical teams are utilizing Polymerase Chain Reaction (PCR) tests to provide definitive diagnoses. PCR testing is essential in these cases to differentiate hantavirus from other respiratory illnesses, as the early symptoms of Hantavirus Pulmonary Syndrome (HPS) often mimic the flu, including fever, myalgia, and fatigue.

As the disease progresses, it can lead to severe respiratory distress and capillary leak syndrome, where fluid fills the lungs, leading to rapid respiratory failure. The lethality rate of the Andes virus is historically high, necessitating immediate medical intervention and supportive care for those who test positive.

The current response involves a tiered system of medical evaluation: those with confirmed positive PCR results are being hospitalized for intensive monitoring, while those identified as contacts but testing negative remain under surveillance to ensure no delayed onset of symptoms occurs.

Health agencies continue to coordinate the exchange of patient data and viral genomic sequences to monitor for any mutations in the strain that could affect its transmissibility or virulence.