Four additional cases of Hantavirus Pulmonary Syndrome (HPS) stemming from infections that occurred after staying in cabins in Yosemite National Park were reported today, Friday, Aug. 31, according to the California Department of Public Health (CDPH).
Two others have now died of the Hantavirus, three have recovered and one is hospitalized but improving, according to park officials. This brings the total number of people infected with the hantavirus who visited Yosemite National Park to six.â€¨â€¨
â€śCDPH is working closely with the National Park Service and the Centers forâ€¨Disease Control and Prevention to further investigate the cluster ofâ€¨Hantavirus Pulmonary Syndrome cases in Yosemite and reduce the risk of â€¨other visitors becoming ill from this virus,â€ť said CDPH Director, Dr. Ron â€¨Chapman.
Five of those infected are California residents and one is a â€¨resident of Pennsylvania. The Pennsylvania patient and one California patient have died.
Four,â€¨including both fatalities, lodged in the â€śsignature cabinsâ€ť of the Boystown â€¨area of Curry Village, one lodged in an unspecified area of Curry Village,â€¨and one is still under investigation.â€¨â€¨
The six individuals infected are residents from the Sacramento region, San â€¨Francisco Bay area, Southern California, and one from Pennsylvania.â€¨â€¨
On August 28, per recommendations from CDPH, Yosemite National Park closed â€¨all tent cabins in the Boystown area indefinitely.
The National Park â€¨Service has issued communications to guests who had stayed in the Boystownâ€¨area between June 10 and August 24, alerting them to the HPS concerns andâ€¨recommending that they seek medical attention if ill.
An outreach effort is currently underway by the park concessioner to contact visitors who stayed in â€śSignature Tent Cabinsâ€ť at Curry Village from mid-June through the end of August. These individuals are being informed of the recent cases and are being advised to seek immediate medical attention if they exhibit any symptoms of hantavirus.
Hantavirus is a rare but serious disease that occurs throughout the United States. Early medical attention is critical for individuals who contract hantavirus. The disease begins with fever and aches, but can progress rapidly to life-threatening illness.
Public health officials believe the four recent visitors might have been exposed while vacationing at Curry Village in Yosemite National Park.
Yosemite National Park has set up a general, non-emergency phone line for all questions and concerns related to hantavirus in Yosemite National Park. The phone number is (209) 372-0822 and it will be staffed from 9:00 a.m. - 5:00 p.m. daily.
â€śThe health of our visitors is our paramount concern and we are making every effort to notify and inform our visitors of any potential illness,â€ť said Don Neubacher, Yosemite National Park Superintendent. â€śBecause people often donâ€™t get sick from hantavirus until one to six weeks after exposure, we are encouraging anyone who stayed in Curry Village since June to be aware of the symptoms of hantavirus and seek medical attention at the first sign of illnessâ€ť.
The National Park Service Office of Public Health has issued a call for cases to state and local health departments nationwide, and is working with the Centers for Disease Control and Prevention to heighten public health awareness and detection. The park and concessioner have also increased public education efforts geared towards visitors and park employees. This includes distributing information to all visitors entering the park, information at Curry Village registration area, and notifications throughout the park.
California Department of Public Health (CDPH) and Yosemite National Park Public Health Service officers conduct periodic rodent surveys to monitor deer mouse abundance and virus activity in mouse populations.
Yosemite National Park has conducted additional rodent trapping and is increasing rodent-proofing and trapping measures in tent cabins and buildings throughout the park. Structures throughout the park continue to be cleaned by following recommended practices and are inspected regularly. Yosemite also conducts routine rodent proofing of buildings and facilities throughout the park.
Since HPS was first identified in 1993, there have been approximately 60 cases in California and 587 cases nationally. About one third of HPS cases identified have been fatal.
HPS is caused by a virus that individuals get through contact with the urine, droppings or saliva of infected rodents, primarily deer mice. Not all deer mice carry hantavirus, but deer mice with hantavirus have been found throughout the United States.
Most infections are caused by breathing small particles of mouse urine or droppings that have been stirred up into the air. If the virus is contracted, the symptoms appear one to six weeks after exposure with fever, headache, and muscle ache, and progresses rapidly to severe difficulty in breathing and, in some cases, death.
Early medical attention can greatly increase the chance of survival, so it is important to seek medical attention immediately if an individual experiences any of these symptoms and may have been exposed to rodents. When people are in wilderness areas or places that harbor mice, individuals can take the following steps to prevent HPS:
Â· Avoid areas, especially indoors, where wild rodents are likely to have been present. Â· Keep food in tightly sealed containers and store away from rodents.
Â· Keep rodents out of buildings by removing stacked wood, rubbish piles, and discarded junk from around homes and sealing any holes where rodents could enter.
Â· When cleaning a sleeping or living area, open windows to air out the areas for at least two hours before entering. Take care not to stir up dust. Wear plastic gloves and spray areas contaminated with rodent droppings and urine with a 10% bleach solution or other household disinfectants and wait at least 15 minutes before cleaning the area. Place the waste in double plastic bags, each tightly sealed, and discard in the trash. Wash hands thoroughly afterward.
Â· Do not touch or handle live rodents and wear gloves when handling dead rodents. Spray dead rodents with a disinfectant and dispose of in the same way as droppings. Wash hands thoroughly after handling dead rodents.
Â· If there are large numbers of rodents in a home or other buildings, contact a pest control service to remove them. For additional information on preventing HPS, visit the federal Centers for Disease Control and Preventionâ€™s Hantavirus Web site page.