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In the above trials the participants were investigated towards the end
of their 15th year by which time 40% were tuberculin positive using old
tuberculin for the Mantoux test. In 1955 and 1956 in this Area the 13-14
age group were Mantoux tested using Purified Protein Derivative and only
10% found to be tuberculin positive. This figure is therefore far below
that of the Medical Research Council trials, but other information
available has shown that other neighbouring areas vaccinating the same
age group and using P.P.D. for the Mantoux test have a percentage of
tuberculin positive children which is similar to ours.
The Medical Research Council's report stated that in the light of
present results the vaccination of tuberculin negative school children in
the 13-14 age group, as carried out in the present B.C.G. vaccination
scheme, is a valuable measure.
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