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. 2004 May;10(5):907–909. doi: 10.3201/eid1005.030825

Table. Logarithmic titers of West Nile virus infectious particles (per 0.1 mL of 10% tissue suspension) present in each type of sample, as detected by plaque assay in Vero cells.

Type of sample No. tested Median (range)
Kidney/spleen pool
7
1.0 (<1.0 to 3.3)
Cloacal swab
12
1.9 (<1.0 to 4.0)
Vascular pulp of flight feather 12 4.9 (3.5 to >7.4)