Recent events on a cruise between Argentina and Cape Verde have raised concerns about the hantavirus. Three individuals have died, while three others, including two crew members, are experiencing severe respiratory symptoms. The World Health Organization (WHO) confirmed that a hospitalized passenger in Johannesburg tested positive for hantavirus following laboratory analysis.
Understanding Hantavirus
Hantaviruses are a group of viruses found worldwide, including in Canada. Dr. Donald Vinh, a microbiologist and infectious disease specialist at McGill University Health Centre, explained that these viruses primarily transmit from wild rodents to humans. Rodents can carry hantaviruses without showing any signs of illness. The virus exists in their urine, saliva, and droppings, and humans can become infected by inhaling contaminated dust or aerosols.
Transmission and Symptoms
In this recent incident, it is believed that infected passengers and crew likely inhaled dust or aerosols from rodent droppings present on the cruise ship. Dr. Vinh noted that human-to-human transmission of hantaviruses is rare, with few recorded cases in South America linked to the Andes virus. The ongoing investigation by the WHO seeks to determine the source of these illnesses and deaths.
The hantavirus can lead to a serious condition known as hantavirus pulmonary syndrome, characterized by rapid fluid accumulation in the lungs, potentially resulting in respiratory failure and death. Initial symptoms mimic those of the flu. However, if patients receive medical attention early, they may be saved through intensive care and mechanical ventilation.
Global Impact and Statistics
Hantavirus infections carry a death rate of approximately 30%. There is currently no specific treatment or antiviral medication available for these infections. In Quebec, two outbreaks of hantavirus occurred in the last 20 years, one in 2004 and another in 2016, as reported by Dr. Vinh.
- 2004: First recorded outbreak in Quebec.
- 2016: Second outbreak identified, involving three Canadian military members returning from Alberta.
Dr. Vinh emphasized that the hantavirus present in Quebec is known as Sin Nombre, affecting primarily deer mice in wooded areas.
Precautionary Measures
Residents in urban areas, particularly those living in mouse-infested homes, should not panic. Not all mice carry the hantavirus; it primarily affects specific species like the white-footed mouse. As spring cleaning approaches, it is crucial to take precautions due to possible rodent infestations in garages and sheds.
Homeowners should air out closed spaces for several hours before cleaning. Additionally, wearing an N95 mask or higher is advisable, as sweeping or vacuuming could stir up hazardous dust and aerosols that lead to infections.
