means tuberculosis of the cardio-respiratory organs of a person who has worked at least 200 shifts in circumstances amounting to a risk and where silica dust or any other injurious dust was present, or any sequelae, complication or manifestation thereof, but does not include inactive or calcified foci;
[Definition substituted by section 1 of the Occupational Diseases in Mines and Works Amendment Act, No. 208 of 1993]