that, far from suggesting they are rare, the video makes
comparisons, as to the degree to which they are "common", with
threadworms, which are so extremely common that one-tenth of the
population is infested with them at any time. To say that
"roundworms are less common than threadworms" is to speak of
roundworms as comparably common, though less so. Furthermore,
the video goes on to assert of roundworms that "infestation is on
the increase", and to magnify their importance by asserting they
are a danger. Similarly, in the case of hookworm, the statement
that "hookworm is the least common in Australia" is immediately
qualified by the assertion: "But outbreaks do occur, and
transfer from person to person is as easy aS with the other
worms." The other worms referred to must, of course, be
roundworm and threadworm, and the suggestion must be that,
although both roundworm and hookworm are less common than
threadworm, they share with threadworm the ready spread of
contagion which has already been graphically illustrated. In
their case, the consequences are to be feared. During the
statements about ingestion of roundworm eggs from vegetables,
there is shown on the screen a picture, not of an Asian peasant
or an aborigine from a settlement in the tropical outback, but of
what might be assumed to be an ordinary Australian washing
vegetables in a plastic bucket, and during the reference to
hookworm larvae burrowing through the skin, usually between the
toes, the video shows what could be a suburban backyard or park
with an apparently ordinary small suburban child playing in it