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. Author manuscript; available in PMC: 2013 Mar 9.
Published in final edited form as: Vaccine. 2012 Jan 2;30(12):2220–2227. doi: 10.1016/j.vaccine.2011.12.090

Figure 3. Replication of NDV challenge virus in various organs of chickens previously immunized with the other APMV serotypes.

Figure 3

The groups of chickens that had been immunized with the various APMV serotypes, or mock-immunized, in the experiment shown in Figure 1 were challenged three weeks post-immunization with 200 50%-chicken-lethal-dose (CLD50) units of virulent NDV strain Texas-GB by the oculo-nasal route. Three chickens from each group were sacrificed on day 4 post-challenge, and the indicated organs were harvested and the titers of NDV challenge virus were determined by limiting dilution assay on DF-1 cells. Titers are expressed in log10 TCID50 per gram of tissue with SEM indicated. Titers above the dotted line (10 TCID50/ml) were considered positive.