| CDC | Centers for Disease Prevention and Control |
| DIF | direct immunofluorescence test |
| MOMP | main outer membrane protein |
| RT | rapid immunochromatographic test |
| RT-PCR | real-time polymerase chain reaction |
| ELISA | enzyme-linked immunosorbent assay |
| ORA | overall agreement |
| IgA and Ig- | antibodies (immunoglobulins) |
| PPV | positive predictive value |
| NPV | negative predictive value |
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