•
SA NDY ( O r * ) POST Thur»
J u n * 10
1901 (S*<
I)
Red tide spectacular,
but can be dangerous
One of the more dramatic
things to happen along
O regon's
sp e c ta c u la r
coastline is the occurrence of
a “ red tide “
The State Board of Health
announced last week that
there were toxic concentra
tions of paralytic shellfish
poisoning plankton along the
north coast of Oregon The
red tide name comes about
because, in some instances,
the plankton becomes so
thick it discolors the water
Poison
can
o ccu r,
however, without the red
tide effect
How long it will stay along
the Oregon coast and how
widespread it will be re
mains to be seen. Persons
planning on going to the
coast should be wary of
eating shellfish, check local
sources for informations
about this lethal organism.
Though very small in size,
about 001 inch in diameter,
this little creature can cause
mammals some serious pro
blems It is ingested by
various types of shellfish
that feed by sucking in
seawater and siphoning out
the various types of food con
tained in it. This group
basically includes mussels,
clams, oysters and scallops.
The concentrations found
in some of these shellfish last
week were toxic only in
areas from Clatsop to
Tillamook Counties But the
bloom and concentration of
plankton is highly mobile, so
the spread of the red tide is
still a threat
Although fish kills have
been associated with various
tides on the east coast, there
is no such indicator with
plankton concentrations in
the Pacific The only danger
to humans is through the
consumption of infected
shellfish
In fiHnling on the plankton,
the shellfish concentrate it
and its poison in their
digestive tract and eventual
ly, to varying degrees, in
their muscles As a result,
the shellfish can still be toxic
for a period of time after
m
they have stopped ingesting
the plankton because their
systems have not flushed out
all of the poisonous material
The troublemaker in the
cycle is a poison called sax
itoxin, which plankton eaters
concentrate This is one of
the most potent poisons
know n, a ffe c tin g
the
transmission of nerve im
pulses Initial symptoms of
tingling in the lips and
tongue may begin to occur
w ith in
m in u te s a fte r
shellfish containing poison
has been eaten
Tingling and numbness in
the fingertips and toes may
then follow Symptoms vary
w ith
in d iv id u a ls , but
generally there is difficulty
in coordination and, in
severe cases, death may
come from re s p ira to ry
paralysis There is no known
antidote and the poison can
not be negated by cooking
the shellfish
T o x ic leve ls of the
plankton are not common in
Oregon and if they do occur,
it happens only between May
and October How long an
area may stay toxic is quite
unpredictable, but the en
vironmental sanitation sec
tion of the State Board of
Health is monitoring the
s itu a tio n . C o m m e rc ia l
shellfish operations in these
areas have ceased and as a
result, there never has been
a case of paralytic shellfish
poisoning associated with
products purchased from
c o m m e rc ia l o u tle ts in
Oregon
Though this type of occur
rence is rare, it can be
serious enough that in
dividuals taking shellfish
should exercise caution Per
sons hearing of a red tide
should check with local
authorities in the area where
they are getting the clams or
mussel».
T ho rou gh ly clean a ll
shellfish during the summer
months In most species, this
elim inates much of the
danger if there are sub-toxic
c o n c e n tra tio n s of the
plankton and its poison
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IN THE NORTHWEST
1981 Sandy High co-valedic-
tonan Anna George spent a
year as exchange student to
Brazil She was active at
SUHS as member of the
drama club and sophomore
class treasurer She was a
pep club organizer and
senior activities chairman.
The National Honor Society
members plans to attend
Lewis and Clark College to
major in law and political
science
Congratulations.
Anna'
Xnna George
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