TICKS AND LYME DISEASE
INFORMATION
Dress appropriately and check for ticks..Ticks do not jump,
fly or drop from trees, but grasp passing hosts from the leaf
litter, tips of grass, etc. Most ticks are probably picked up on the
lower legs and then crawl up the body seeking a place to feed. Wear
light-colored clothing with the pants tucked into socks. Repellents
can substantially increase the level of protection (next page). On
returning home, remove and wash the clothing. Carefully inspect the
body and quickly remove any attached ticks. Tick bites are usually
painless and, consequently, many people may be unaware that they
have been bitten. Also, carefully inspect children and pets. Ticks
may attach anywhere on the body. Pets can bring ticks into the home,
resulting in a tick bite without the person being outdoors. Many
tick bites are thought to occur around the home. A tick bite does
not necessarily mean a person will develop Lyme disease. Many ticks
are not infected and studies have indicated that it may require
36-48 hours or more for transmission to occur from an attached
nymph.
Remove ticks promptly. . .
Prompt removal of an attached tick will reduce the chance of Lyme
disease infection. Use thin-tipped tweezers or forceps to grasp the
tick as close to the skin surface as possible. Pull the tick
straight upward (see illustration) with steady even pressure. This
should remove the tick with the mouthparts intact. If the mouthparts
break off, it will not affect the chance of getting Lyme disease.
Disinfect the area; a topical antibiotic may also be applied. A dead
tick can be saved in alcohol. If a tick is to be tested for
spirochetes, place it in a small vial or jar with a blade of grass
to keep it alive. Note the site and date of the bite. Other methods
of tick removal (e.g. petroleum jelly to suffocate the tick) are not
effective. Use of heat from matches to make the tick back out or
gasoline or other chemicals are unacceptable. Watch for signs and
symptoms of Lyme disease.
Signs and symptoms of Lyme disease . . .
Localized infection -
Approximately 70 - 80% or
more of patients develop a red rash (erythema migrans or EM) within
2 to 32 days (typically 8 or 9 days) after the tick bite. The rash
gradually expands over a period of a week or more. Rashes vary in
size and shape, and may occur anywhere on the body, although common
sites are the thigh, groin, trunk, and armpits. Many rashes reach
about 6 inches in diameter, but some can be 8-16 inches or more in
size. The rash often remains red, but swelling, blistering, scabbing
or central clearing may occur, resulting in a "bulls-eye"
appearance. The rash may be hot to the touch, but it is usually not
painful. Mild nonspecific, flu-like symptoms may be associated with
the rash. In most cases, symptom onset occurs during the summer
months when the nymphal stage of Ixodes is active. Lyme
disease affects all age groups, but the greatest incidence has been
in children under 14 years and adults over 40 years of age. There
may be no early symptoms in some cases.
Disseminated infection -
The course and
severity of Lyme disease is variable. Days or weeks after the bite
of an infected tick, multiple rashes, migratory joint and muscle
pain (also brief, intermittent arthritic attacks), debilitating
malaise and fatigue, neurologic or cardiac problems may occur. Early
neurologic symptoms develop in about 15% of untreated patients and
these can include paralysis of facial muscles (Bell’s palsy),
meningitis (fever, stiff neck, and severe headache), and
radiculoneuropathy (pain in affected nerves and nerve roots, can be
sharp and jabbing or deep). A year or more after the tick bite in
untreated or inadequately treated individuals, symptoms of
persistent infection may include numbness or tingling of the
extremities, sensory loss, weakness, diminished reflexes,
disturbances in memory, mood or sleep, and an intermittent chronic
arthritis (typically swelling and pain of the large joints,
especially the knee). Approximately 50-60% of untreated patients
develop arthritis and about 10% of these will progress to chronic
arthritis. |