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Table 4 Diagnostic validation of different tests using nested PCR as gold standard (all values are in percentage).

From: Immunohistochemical diagnosis of abdominal and lymph node tuberculosis by detecting Mycobacterium tuberculosis complex specific antigen MPT64

Diagnostic method

Sensitivity

Specificity

PPV

NPV

LYMPH GLAND TB

    

Anti-BCG

88

86

94

76

Anti-MPT64

93

98

99

85

ABDOMINAL TB

    

Anti-BCG

86

81

86

81

Anti-MPT64

89

95

96

87

TOTAL TB CASES

    

Anti-BCG

88

85

92

78

Anti-MPT64

92

97

98

85

  1. PPV = positive predictive value, NPV = negative predictive value