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ALBUQUERQUE, N.M. (AP) — A suspected outbreak of hantavirus aboard a cruise ship has resulted in three fatalities and several illnesses among passengers.
The World Health Organization has confirmed the presence of the virus in at least one case and is conducting further investigations into the outbreak. Hantavirus is typically transmitted through rodent droppings, urine, or saliva and is not commonly associated with cruise ships. The Centers for Disease Control and Prevention (CDC) reported that gastrointestinal and respiratory illness outbreaks on cruise ships are often caused by more contagious pathogens like norovirus, with 23 reported outbreaks last year alone.
Transmission of Hantavirus
Hantavirus is primarily transmitted through contact with rodents or their excretions, particularly when disturbed materials become airborne, leading to inhalation. Human exposure typically occurs in enclosed spaces such as homes, cabins, or sheds where rodent droppings are present.The WHO has noted that while rare, hantaviruses can also be transmitted between humans. The CDC began monitoring the virus following a significant outbreak in the Four Corners region of the United States in 1993.
Michelle Harkins, a pulmonologist at the University of New Mexico Health Sciences Center, indicated that most U.S. cases of hantavirus occur in Western states, with New Mexico and Arizona being particularly affected due to rural environments conducive to rodent encounters.
Symptoms and Progression of the Illness
The initial symptoms of hantavirus infection can resemble those of the flu, including fever, chills, and muscle aches. Dr. Sonja Bartolome from UT Southwestern Medical Center highlighted that early symptoms may not differentiate between hantavirus and flu.Symptoms typically manifest between one to eight weeks after exposure to an infected rodent. As the condition advances, individuals may experience chest tightness as fluid accumulates in the lungs. The illness can lead to two syndromes: hantavirus pulmonary syndrome and hemorrhagic fever with renal syndrome, with the former having a mortality rate of approximately 35%.
Challenges in Understanding and Treating Hantavirus
Currently, there is no specific treatment for hantavirus, although early medical intervention can enhance survival chances. Harkins noted that numerous questions remain unanswered regarding the illness, including the variability in severity among different individuals and the development of antibodies.Preventative measures focus on minimizing rodent contact and safely cleaning droppings, with public health officials advising against sweeping or vacuuming, which can aerosolize the virus.
Global Perspectives on Hantavirus
The term hantavirus encompasses a diverse family of viruses, with various strains found worldwide. Most strains are not known to transmit between humans, except for a variant from South America, which has raised concerns due to the cruise's origins in Argentina.Angela Luis, a researcher at the University of Montana, emphasized the importance of thorough investigations to determine the outbreak's specifics and whether human transmission is possible.
“This situation could provide valuable insights into hantavirus transmission,” Luis stated.
