Table 1.
Diagnosis of a Family Cluster of Cases Using IgM ELISA
| Relationship | Age, years | PCR | IgM Titers | IgG Titers | Computed Tomography | Clinical Diagnosis |
|---|---|---|---|---|---|---|
| Grandmother | 61 | + | 400 | − | + | Case |
| Grandfather | 64 | − | 800 | 3200 | + | Case |
| Daughter | 37 | − | 400 | − | + | Close contact |
| Son-in-law | 40 | − | − | − | − | Close contact |
| Grandson | 6 | + | 200 | − | − | Close contact |
| Granddaughter | 2 | − | 400 | − | − | Close contact |
Abbreviations: ELISA, enzyme-linked immunosorbent assay; IgM, immunoglobulin M; PCR, polymerase chain reaction; +, positive; −, negative.