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Detection of virus injected into the trigeminal ganglion by plaque assaya
| Number of PFU injected/ganglion | Number of ganglia containing infectious virus/number of ganglia tested | Mean PFU ± standard deviation |
| 100 | 10/10 | 28 ± 7 |
| 50 | 6/10 | 7 ± 4 |
| 10 | 1/10 | 1 |
| 5 | 0/10 | 0 |
| 1 | 0/10 | 0 |
aIntact trigeminal ganglia were injected with the amounts of virus indicated and homogenized. The homogenate was tested for infectious virus by plaque assay.
