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. 2021 Oct 12;95(5):336–344. doi: 10.1016/j.anpede.2020.10.007

Table 3.

Tests for microbiological diagnosis of COVID-19.

SARS-CoV-2 PCR not performed: 1 Inconclusive SARS-CoV-2 PCR test: 8 (11.3%) Negative SARS-CoV-2 PCR: 30 (42.3%) Positive SARS-CoV-2 PCR: 33 (46.4%)
Microbiological diagnosis not performed: 5 0 0 3 2
Negative antibody test: 39 (58.2%) 1 5 23 10
Positive antibody test: 28 (41.8%) 0 3 4 21
 Positive IgM, negative IgG: 1 (1.4%)
 Positive IgM, positive IgG: 5 (6.9%)
 Negative IgM, positive IgG: 22 (30.6%)