Phylogenetic relationships and pathogenicity variation of two Newcastle disease viruses isolated from domestic ducks in Southern China

Table 8 Virus titers in cloacal and oropharyngeal swabs from geese

Strains		Days post-inoculation (log₁₀EID₅₀/0.1 mL) ± SD^a
		3 Day		5 Day		7 Day		9 Day		11 Day
		Oropharyngeal swabs	Cloacal swabs	Oropharyngeal swabs	Cloacal swabs	Oropharyngeal swabs	Cloacal swabs	Oropharyngeal swabs	Cloacal swabs	Oropharyngeal swabs	Cloacal swabs
SS-10	Infected ^b	2.67 ± 0.79(5/6)	1.60 ± 0.14(3/6)	1.67 ± 0.14(2/3)	1.92 ± 0.72(1/3)	ND ^d (0/3)	1.88 ± 0.53(2/3)	ND(0/3)	ND(0/3)	ND(0/3)	ND(0/3)
SS-10	Contact ^c	1.58 ± 0.14(1/3)	2.08 ± 1.01(2/3)	1.58 ± 0.14 (1/3)	3.00 ± 1.30(2/3)	ND(0/3)	ND(0/3)	ND(0/3)	ND(0/3)	ND(0/3)	ND(0/3)
NH-10	Infected	2.38 ± 0.38(6/6)	2.08 ± 0.90(2/6)	2.17 ± 1,15(1/3)	1.75 ± 0.43(1/3)	1.58 ± 0.14(1/3)	ND(0/3)	ND(0/3)	ND(0/3)	ND(0/3)	ND(0/3)
NH-10	Contact	3.17 ± 0.95(3/3)	2.00 ± 0.66(2/3)	1.58 ± 0.14(1/3)	1.75 ± 0.43(1/3)	1.58 ± 0.14(1/3)	1.58 ± 0.14(1/3)	ND(0/3)	ND(0/3)	ND(0/3)	ND(0/3)

^aFor statistical purposes, a value of 1.5 was assigned if virus was not detected from the undiluted sample in three embryonated hen’s eggs [17].
^bGeese inoculated with virus.
^cNaive contact geese housed with those inoculated.
^dNo detected.

ISSN: 1743-422X