o Silicosis o Diabetes mellitus o Chronic renal failure/end-stage renal disease o Hematologic/reticuloendothelial disease o Cancer of head, neck, or lung o Intestinal bypass or Gastrectomy o Chronic malabsorption syndromes o Organ Transplant  Infants, children, and adolescents frequently exposed to adults at high risk for TB infection  Children <4 years of age (unless由于状况或暴露，该孩子属于另一类）报告了在流行县长期暴露或延长住宿历史的旅行者（例如拉丁美洲和加勒比海，非洲，亚洲，东欧和俄罗斯）