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Table 1 The Laboratory finding of both patients at the time of limp. The acute phase reactant of both patient were in normal range after 1 week

From: Post SARS-CoV-2 infection reactive arthritis: a brief report of two pediatric cases

Laboratory Test Case-1 Case-2
WBC(5-14.5)10*3/µL 9.3 9.7
RBC(3.9–5.3)10*6/ µL 6.16 4.11
ANC 3255 5600
ALC 5700 2650
Hb (11.5–15.5 g/dl) 15.9 11.9
MCV(75–87 fL) 75.6 82
Platelet(172–450)10*3/ µL 310 511
ESR(0–15 mm/h) 7.0 39.0
CRP(0–10 mg/l) 13.0 12.0
PBS for blast Negative Negative
BUN 10 7
Cr (0.5-1 mg/dl) 0.5 0.6
AST (5–60 IU/ml) 24 23
ALT (6–50 IU/ml) 17 12
ALP (180–1200 IU/ml 558 339
Ferritin(11–92 ng/ml) N.A 49.30
LDH (< 746 U/L) 385 409
Uric Acid (3-6.4 mg/dl) 2.1  N.A
Wright Agglutination Test Negative Negative
2ME Negative Negative
Coombs Wright Negative Negative
ASO-Titer (up to 200 IU/ml) 62 31
ANA (IU/ml) Negative (0.2) Negative
RF (< 16 IU/ml) 27 Negative
Coronavirus IgM (< 1.1)*
Indirect ELISA
3.8 1.2
Coronavirus IgG (< 1.1)**
Indirect ELISA
3.4 0.35
Coronavirus PCR N.A Positive
  1. * & **: Detection of SARS-CoV-2 antibodies was performed using SARS-CoV-2 immunoglobulin M (IgM) ELISA kits (Pishtaz Teb, Iran, http://pishtazteb.com) and SARS-CoV-2 IgG ELISA kits (Pishtaz Teb, Iran http://pishtazteb.com) according to the manufacturer’s protocol. Pishtaz Teb Zaman diagnostic Kits (Specificity: 97.30 %; Sensitivity: 79.40 %)