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The introduction of chemoprophylaxis with rifampicin and isoniazid in 1981 significantly reduced the incidence of tuberculosis. Between 1978 and 1981 children accounted for 136 of 642 notified cases, and this was reduced to 55 of 418 between 1982 and 1986. This effect was most obvious among children from the Indian subcontinent who comprised 80.2% of the children treated. The incidence among white children was not affected. Few side effects occurred and only two of 339 (0.6%) later developed clinical tuberculosis. Chemoprophylaxis plays an important part in the management of tuberculosis in a district with a high incidence of the disease. [ABSTRACT FROM AUTHOR]

Seventy cases of Down syndrome have been ascertained in South Glamorgan during the period 1968 to 1976. This gives an overall incidence of 1 in 658 live births. Analysis of the data on the basis of single years of maternal age gives an incidence of 1 in 200 by 36 years, 1 in 100 by 40 years, and 1 in 50 by 44 years. All incidence figures are for live births at age of delivery. [ABSTRACT FROM PUBLISHER]