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ILTV log10 GC (LSM ± SE) in the inoculum and allantoic fluid of embryonated eggs inoculated with dust samples naturally ILTV log10 GC positive, spiked dust and ILTV stock propagated in cell culture after the first and second passage. Number of positive samples and total number of samples are also given. Superscripts (ABC) not sharing the same letter denote difference (p <0.05) between samples.
