Table 2. Serology, nasal wash and tissue titres in virus re-challenged ferrets.

#	Group	Site of infection	HAI titer	MN titer	Re-challenge virus	Titres post challenge*
						Nasal wash	Nasal†	Trachea†	Lung†
1	Naive	NA	0	0‡	rgCA/09	105.25 §	105.25	103.5	104
				0||		104 ¶
2	Naive	NA	0	0	CA/09-PA NLuc	105.5	105.5	103.5	103.75
				0		103.5
3	Donor 1	Nasal and lung	1,280	1:1,600	CA/09-PA NLuc	0	0	0	0
				1:12,800		0
4	Direct contact 3	Nasal and lung	320	1:200	CA/09-PA NLuc	0	0	0	0
				1:2,400		0
5	Direct contact 2	Lung only	320	1:100	CA/09-PA NLuc	104.5	103.75	101	102.5
				1:1,600		102.5

NA, not applicable.

^*TCID₅₀ per ml.

^†Three days post challenge only.

^‡Enzyme-linked immunosorbent assay end point.

^§One day post challenge.

^||Luminescent end point.

^¶Three days post challenge.