| http://www.w3.org/ns/prov#value | - Seronegative infection was confirmed by other laboratories using polymerase-chain-reaction (PCR) assays to document the presence of microbes in seronegative patients.3,4 Abrogation of a humoral response by removal of the bulk of microbial antigens has been seen in other settings, including infection with Treponema pallidum.
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