Sentence examples for be positive for at from inspiring English sources

We had checked the presence of eight major virulence factors and most of the isolates were found to be positive for at least five different virulence genes.

PCR showed the index patient's serum samples to be HBoV1-positive for 4 weeks and nasal mucus samples to be positive for at least 3 months.

Eligible participants will have a history of T1D with a duration of diabetes less than 24 months from diagnosis and be positive for at least one autoantibody (box 1).

Samples were significantly more likely to be positive for at least one mRNA marker using RT PCR than using the CellSearch System (P=0.001) or the AdnaTest (P<0.001).

It is to be noted that of the 11 patients with less than five GD2-positive cells/10 total cells, seven were also evaluated by RT-PCR and all but one were found to be positive for at least one NB molecular marker (data not shown).

Samples were significantly more likely to be positive for at least one PCR marker than by cell filtration (83 vs 30%, P<0.001) or IMS (83 vs 48%, P<0.001).The use of a multimarker real-time RT PCR assay was therefore found to be the most sensitive technique for the detection of circulating epithelial cells in the blood of patients with breast cancer.

Eighteen of the 27 pus samples were positive for at least one DNA probe.

Chest CT was positive for at least one consolidation in 87 studies.

77 (82.79%) were positive for at least 1 item of the Arboleda-Florez Checklist.

LUS was positive for at least one consolidation in 60 patients (46.9%).

Out of 109 DNA samples, 23 (20 from cattle and 3 from water buffaloes) were positive for at least one genotype.