Table 1.

Blood testing to determine the cause of acute iridocyclitis.

Test	Result
HLA- B27	Negative
Rheumatoid factor	Negative
Angiotensin converting enzyme	41 u/l – (reference range: 16−85 u/L)
QuantiFERON-TB Gold Plus	Non Reactive
ANA screen	Negative
HIV 1&2 antigen antibody screen	Non reactive
Syphilis IgG	Reactive
RPR screen	Reactive
RPR quantitative titer	1:128—(reference range: <1:1)
Urine gonorrhea and chlamydia nucleic acid amplification test (NAAT)	Negative