Fig. 6

Flow diagram of experimental plan. STM-1 was administered by spray at 0.1 week followed by drinking water at week 6 and then intramuscular at week 12. Red arrows indicate sample collection points during rear and production. Birds were reared on rearing farm up to week 15 and transferred at the point of lay to production farm at week 16. * = Testing of production shed prior to placement at point of lay pullets; # = Placement at point of lay pullets on Farm A and Farm B