Sentence examples for determined negative for from inspiring English sources

Laboratory testing initially focused on identifying pandemic influenza cases by using the specific RT-PCR; samples determined negative for pandemic influenza virus by NAT were tested for influenza A (including seasonal influenza virus) several weeks after passengers had disembarked.

The expression values of both histologically and immunohistochemically positive lymph nodes ranged from 2.5 × 10−3 to 1.7 × 10, which were significantly higher than the values for either histologically or immunohistochemically determined negative lymph nodes, for which values ranged from 0 to 1.4 × 10 (P<0.00010.

HIV-negativity was determined as negative for interferon-γ autoantibody using repeated enzyme-linked immunosorbent assay (ELISA) testing.

Seven coyotes (5 males, 2 females) whose age could not be determined were negative for M. bovis.

Percent inhibition (PI) values were then calculated and samples determined as negative for PI values < 30% or positive if ≥ 30%.

Very low levels of IFN-γ and IL-2 were observed when cocultured with the MDA-MB-468 and TC-1 cell lines, which we determined were negative for HER2 expression by FACS analysis.

The film resistance Rsei and charge transfer resistance Rct were determined for negative electrodes in EC/ethyl methyl carbonate (EMC) electrolyte solution, and the formation mechanisms of the interfacial film were discussed.

To explore this issue in greater depth, we compiled coded replicate samples of blood from 15 subjects previously reported to be XMRV/MLV-positive (14 with CFS) and from 15 healthy donors previously determined to be negative for the viruses.

All antibodies were determined to be negative for neutralizing antibody activity.

As negative control, peptides were screened with a serum pool from twenty-one individuals that were determined to be negative for DENV-3, and also for DENV-1 and DENV-2 by multiple serological detection methods.

Ferrets were housed throughout each experiment in cages within a Duo-Flo Bioclean mobile clean room (Lab Products, Seaford, DE) and were determined to be negative for antibody to circulating influenza A (H1N1, H3N2) and Influenza B viruses.