Table 4.

Efficacy of food additive calcium grade hydroxide powder for inactivating Newcastle disease virus and avian influenza virus under wet and dry conditions at consecutive re-suspension times, with a 3-min incubation period.

Number of resuspension	Newcastle disease virus			Avian influenza virus
	Treated	Control	RFa	Treated	Control	RF
1	<2.50	8.25	>5.75*	<2.50	6.00	>3.50*
2	<2.50	8.25	>5.75*	<2.50	6.00	>3.50*
3	<2.50	8.25	>5.75*	<2.50	6.00	>3.50*
4	<2.50	8.25	>5.75*	<2.50	6.00	>3.50*
5	<2.50	8.25	>5.75*	<2.50	6.00	>3.50*
6	<2.50	8.25	>5.75*	3.50	6.50	3.00*
7	<2.50	8.25	>5.75*	3.25	6.25	3.00*
8	<2.50	8.25	>5.75*	3.50	6.25	2.75
9	5.25	8.75	3.50*	3.50	6.25	2.75
10	5.00	8.75	3.75*	4.00	6.25	2.25
11	5.25	8.75	3.50*	NTb	NT	NT
12	5.00	8.75	3.75*	NT	NT	NT
13	5.25	8.75	3.50*	NT	NT	NT
14	5.50	8.75	3.25*	NT	NT	NT
15	5.50	8.75	3.25*	NT	NT	NT
16	5.25	8.75	3.50*	NT	NT	NT

^aRF=Reduction factor,

^bNT=Not tested.

^*Inactivation regarded as effective when RF was ≥3