What test can be used to determine whether a patient has an infectious or autoimmune disease?

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ANAdsDNAHistoneNucleoproteinSm (ribonuclear)
SLE
 Sensitivity>95%70%∼50%60%25%
 Specificity609550Medium99
RA
 Sensitivity451Low251
 Specificity60Low
Scleroderma
 Sensitivity60<1<1<1<1
 Specificity50
PM/DM
 Sensitivity60<1<1<1<1
 Specificity60
Sjögren's
 Sensitivity50<5LowMedium<5
 Specificity50LowMedium