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68
The Last Resource
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ciguatera. Unlike tetro dotoxin and most other poisons, true ciguatera
occurs in sh such as the. red snapper which are ordinarin edible.
Often these potential b00by traps are restricted to particular localities
and in some cases it is=even possible to say that sh taken from, say,
the north side of an island should be safe whereas those from the
south are deadly. This kind of restricted distribution suggests that
‘
the presence of poisonous sh is related to the occurrence of s0me
Ï
Other marine organism which ourishes in these areas, ' but all
attempts to identify it have so far proved inconclusive. One of the
diiculties may be that several organisms are involved, in which case
examples of poisoning now grouped together may vary in detailed
symptoms and origin. Some investigators lay the blame on the blue—
green alga, Lyngbya majuscule, which occurs…in the plankton. One
important piece of evidence implicating a member of the plank—ton
is the similar type of poisoningfound in shell sh. Paralytic shell
sh poisoning is also restricted to specic localities and is apparently
.
caused by the shell sh’s ability to accumulate the toxic products
taken from phytoplankton growing there.
—
_
-
«Minute algaewhich appaœntly pass on their poison give waÎy-to
offer prospectsasbentædal drugs.«Some'—of
the earliest applications of algae in… medicinal herbs Wer—ein the
,
treatment a of…. gaStric disorders; including those resulting from
_
In some. cases sciensts
to i301at‘e lactiVe
ingredients from such
The_Ïapanese took pr'epaiatiosof the
_
seaweed Digeäze‘a simplex ;as;æà*vtærmifuge>‘(Worm remover) and a
substance;"kainic acid’, With this pr0pey has_bee‘ is”o‘latedfrom it.
Today a drug incorporating«SOme
extracted from
‘
is mark‘ete'd as
vermifuge: iii- japan.
extraèted from Irish moSs, has been shown
ulcers
from forming' in experimental
undigested «by humans was Well as
used ll]to treat
diarrhoea and similar ailrri‘èntS. Thisability of agar—…£andv?_Certain
'
alginates to pass undigested
been
exploited in the preparation of
The
drug ingredients are c0ated with, - say,:
“so, that ;‘the
pill
the stomachitoïthe->lower
releaSing the ContentsïHowev6nso sfar
.;fr0m
‘
marine algae are on the market, although in” the light of “recent
events “the position could change rat—her?
7
—'
long…—since the rst
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