Abstract P117 Table 1

Cytological grades and relationship to TST, IGRA and culture positivity

Cytological grade*Number of cases (n)TST or IGRA positive cases (n)Culture positive cases (n)
Grade I441
Grade II1482
Grade III951
Grade IV431
Grade V541
Total36246
  • *Grades I, II and III were said to be highly suggestive of a tuberculous process. Grade I, epithelioid granulomatous reaction with caseation; Grade II, epithelioid granulomatous reaction without caseation; Grade III, non-granulomatous reaction with necrosis; Grade IV, non-specific; Grade V, inadequate sample.