Phenotypes of primary infection after airborne transmission.

aPhenotypes were categorized selected by comparing the trends of bioluminescent signal within individual animals in each of the following tissues: nasopharynx, trachea, and lungs.
bMice reported were infected through airborne exposure to donor animals inoculated with either 70 or 7000 plaque forming units of SeV.
cIn two mice, bioluminescence was detected at very low levels late after co-housing and the mice seroconverted on day 30. Such an infection is characteristic of non-productive transmission.