Wear light colored clothing and tuck pants into boots or socks so that ticks will be more visible. Apply a tick repellent to clothing. For more information, call the park sanitarian at Not long ago, many areas along the Merced River showed signs of human trampling.
Now, because of the careful actions of park staff and visitors, many of these areas have been restored to more natural conditions. Avoid areas of "white-water" where streams flow briskly over rocks. Each year, unsuspecting visitors are swept over waterfalls to their deaths. In , three such tragedies occurred. In spring and summer, rivers and creeks swollen by runoff from snow-melt are dangerous.
Powerful current, icy water and trees and logs can trap or kill the unwary. Crossing a natural bridge of rocks or logs can be slippery. Never cross above rapids or waterfalls. Treatment methods include boiling for five minutes, use of a Giardia-rated filter or iodine-based purifier. If facilities are not available, bury human waste six inches deep in biologically active soil at least feet away from any water source or trail.
Coast Guard-approved personal flotation device immediately available. A valid California sport fishing license is required for persons age 16 years and older. When fishing, the license must be plainly visible by attaching it to an outer layer of clothing above the waistline.
Ticks are just the approximate size of a sesame seed but are capable of feeding upon large animals. Howard Ginsberg, a research ecologist and field station leader of the U.
Government Patuxent Research Center at the University of Rhode Island, has published more than 20 articles on ticks and tick borne diseases.
Cases reported each year ranged within 16,, nationwide in the late s though , but climbed to 23, cases in Ginsberg believes the number of patients with Lyme disease has increased due to the ticks spreading to areas where they were not located in the past.
Although Lyme disease is the most common, there are many other tick-borne diseases that are far less common, such as Powassan encephalitis, Rocky Mountain spotted fever, human granulocytic ehrlichiosis, human monocytic ehrlichiosis, borrelia lonestari, tularemia, Q-fever and others. At right, a boardwalk built on Fire Island National Seashore to prevent people from walking through tick-infested areas Photos courtesy of National Park Service. Below, ticks found in national parks. Ticks can attach to any part of the body and often target areas like the groin, armpits, and scalp.
Russell Graham, the Northeast region consultant for the National Park Service, had much to say about the Lyme disease problem that has been growing drastically. It is clear that many different areas are prone to tick infestation and Lyme disease. Many of these areas include National Parks. Although there are certain parks and states that are known to have cases of Lyme disease, there are sometimes rare cases in less-common states.
Dean Shenk, the supervisory park ranger in the division of education and interpretation at Yosemite National Park in California spoke about his experience with ticks and Lyme disease on a phone interview. Yosemite actually is a home to the disease. I personally have seen bears and deer effected by the disease in the park. I work on-trail and have had ticks on me, but never contracted a disease. Ten Essentials. Tree Hazard. Trip Planning. Tuolumne Hiking. Tuolumne Meadows Campground.
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