Mycobacteria are ubiquitous, occurring everywhere in the world, except perhaps the Polar
Regions. In deserts they can be found under rocks and among the dried roots of vegetation …

A proposal is made that there are 2 mechanisms of cell mediated response to mycobacteria,
both of which produce positive tuberculin tests and that one of them is more protective …

Four hundred and seventy tuberculosis patients were each skin tested with four of a range of
17 mycobacterial reagents in four countries in all of which tuberculosis and leprosy were …

Six hundred and sixty four children attending elementary schools in and around the town of
Butajira in Shoa district of Ethiopia have been skin-tested with a sonicate tuberculin and the …

Multiple skin-testing, lymphocyte transformation tests and enzyme-linked immunosorbent
assay of antibodies to mycobacterial antigens have been carried out on patients and their …

A multiple skin test survey was carried out in Kuwait on 1200 school children aged 8–11
years, and on 1228 children aged 12–16 years. With only 15 exceptions, all these children …

Background Through its powerful immunoregulatory effects, infection with atypical
mycobacteria may exert a protective effect on the development of childhood allergic disease …

Summary 1888 school children aged between 7 and 17 years, living in 13 villages in two
districts of North Lebanon, were skin tested with four new tuberculins as the initial step in a …

Quadruple skin-testing with a range of 22 new tuberculins and PPD-RT23 was carried out
on 665 school-children without BCG scars and 666 with BCG scars, in and around the towns …

Badger tuberculosis is endemic in some areas of Britain and Ireland and its transmission to
cattle is established. Since 1975 control of the disease has relied on culling badgers, many …