carriers away from the other children ------- .
A) even if there are very few of them
B) since this will make the treatment more effective
C) even it this means closing the school
D) otherwise they will all become re-infected
E) especially in the period just before active immunity takes place
Worms are known as intestinal parasites, but the only common types found in France are thread
worms, the tiny thread-like worms which cause irritability and itching in the skin of children, less
often in adults. Then there are round-worms, somewhat resembling the ordinary garden earthworm,
which seldom lead to symptoms. Finally, the third group is the tapeworms which my reach a length
of 6 m. Many parasitic worms lead a double life, they spend part of their life in the human intestine
and the other part in the muscles of another animal. The tapeworm, for example, while in the human
intestine, lays eggs which pass out of the body in the excrete, and are then swallowed by various
animals, especially in those parts of the world where human excrete are used as fertilisers in the
fields.
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