Table 1. The RT-PCR primers successfully used in amplification of the viral 1b gene.

Primer pair	Sense	Sequence
IBV-1b1	Upper	5′-GGATATAGACAAGGGTAGTAA-3′
	Down	5′-ACAAAACACTCTGGTACCAT-3′
IBV-1b2	Upper	5'-GGTGGTAGTCTGTATGTGAA-3'
	Down	5'-GGATACCGCTTATAACACT-3′
IBV-1b3	Upper	5′-TGGGWTGGGAYTAYCCWAARTGYGA-3′
	Down	5′-GCATWGTRTGYTGNGARCARAATTC-3′