Jim was descending a steep bank near a telephone pole, when
his feet suddenly slipped out from underneath him. As he
skidded down the bank he grabbed the pole. It was covered with
poison-oak. His arm was scraped, but he was otherwise OK.
Jim had never gotten poison-oak He wasnt worried. He went on
working, and showered five hours later. Jim got the rash where
hed been scraped.
Its been years since that happened. He hasnt any more
trouble.
Stuck
Mike works full time out-of-doors. He is sensitive to
poison-oak. He often has rashes on his arms, especially in the
gap between his sleeves and gloves.
Mike was clearing brush, and was stabbed in the wrist by a
poison-oak twig. I ought to clean that up! he thought.
Thirty-five minutes later he remembered again, and did so.
That night he was awoken by painful throbbing of his arm. Red
streaks were coursing up his arm.
Wrecked
A boy was
riding his bike in a creek, hit a rock, and got thrown into a
poison-oak bush. He reacted so severely, he had to be
hospitalized!
To prevent
these serious reactions a routine has been developed:
IMMEDIATELY wash the wound; drinking water is fine. Blot dry
with a clean cloth, for example a shirt tail. Seal the wound
with sun block. And cover it with a bandage.
Alaska
In July 1999 I visited Alaska with
my youngest son. Just before we left I got another
once-in-a-lifetime opportunity: permission to dig out
the entire root system of a full-grown poison-oak! A car
had lost control, left the road and sheared the top off
an eight-foot-high plant. The root, at soil level, was
six inches in diameter. I cleared the ground for five
feet in every direction. Soon, I was stripped to a T
shirt, and reaching into a five foot deep hole from
which a three inch tap root disappeared. My arm brushed
the soil.
Two
days later, in lower British Columbia, my arm broke out.
I scrubbed the rash with Tecnu, and the rash cleared. On
day seven, I became aware of a tingling of my legs just
below the knees. The adjustment strings of my gaiters
flipped around in the brush; I had never had this
problem, before. On day eleven, my hands began to itch
when I drove, and we had to buy a steering wheel cover!
With each reaction my sensitivity had been ramping
up. (Fortunately, since then my sensitivity has dropped
again.)
CHRONIC REACTIONS
Months
A woman reports that her two children got bad cases of
poison-oak; she worried that they would not recover. Her son
had a plaque of abnormal skin for two months. Her daughter had
a plaque for five months.
Just Poison-Oak
Another woman
reports was out for a run, and hit some poison-oak stems
pretty hard. Shed had mild reactions before, and thought
Its just poison-oak! As a precaution she took a hot shower
right after the run.
She had such
a severe reaction she thought for months she was dying! And,
she was left with chronic fatigue. Five years later she was
still unwell.
She may have
been scratched (see FIRST AID). Use a shower, not a bathtub,
because you want the urushiol to go down the drain, not
spread. Start with cool water at the beginning of your shower;
hot water increases blood flow to your skin, which increases
the rate at which memory cells find the haptene.
BE A SLEUTH
Newlyweds
In 1963 we
got married, and our first apartment cost $25 a month. One of
the things it lacked was screens they had rusted out.
Jacksonville, Florida, was hot at night, so we left the
windows open and slept under a mosquito bar that we used for
camping. My wife developed a rash on the side of one knee. Im
lying there one night, and I see the breeze blow the netting
against her leg, and I remembered camping in some ivy. We gave
the netting a bath, and the rash disappeared.
Sometimes you have to be a sleuth to figure it out, but
transmission often works like this we had crushed some ivy
on the netting, and then forgotten about it.
A Hunting We Will Go
Jack got a leather hunting vest for Christmas; he proudly
hung it in the hall closet, and used it that spring. He used
it next one day in the fall; there was no poison-oak around,
but he got the typical rash anyway!
Leather soaks up urushiol like a sponge. The air in the
closet was dry, ideal storage conditions for the poison - it
lasted six months.
Rosy Cheeks
The doctors were puzzled. The
forces of Japanese occupation had rashes on their right
cheeks; their elbows; and on their buttocks!
Turned out that in their spare
time, the troops were firing captured souvenir rifles and
hanging around Jap bars. The rifle stocks, counter tops and
bar toilet seats were all lacquered with urushiol!
See the Biochemistry section of this
web site, and the reference in the 12-1-06 Annotated Bibliography for
more information on urushiol. In seventeenth century Japan
demand for urushiol so exceeded supply that the emperor
ordered every farmer to cultivate lacquer trees on a
percentage of his land, and pay his taxes in sap, on pain of
death!
In the early twentieth century
Japanese chemists figured out the chemical structure of
urushiol, which earned them the right to name the mixture.
Urushiol is the word they chose; the word means oil (ol) of Tsuta urushi, Japanese for the oriental lacquer
tree.
During World War II Japan was
cut off from other sources of lacquer, and they used urushiol
extensively.
Miscellany
Holler on Hollister
Back in the time when it was OK to climb Mount Hollister, a
young man found a banner on a pole wedged between rocks on the
east side of the summit. Hey, he yelled to his friend; Im
going to be king of the mountain. He gave a mighty tug on the
pole. To his surprise, the pole popped loose easily. He
tottered backwards and fell off a cliff.
Poison-oak grew in a lush thicket at the foot of the cliff.
It broke his fall, and he wasnt seriously hurt!