Table 1.

The results are presented as log₁₀ TCID₅₀/ml (mean±SE) of Newcastle disease virus and avian influenza virus inactivating efficacy, using food additive grade calcium hydroxide powder, in the absence or presence of organic materials.

Organic materials	Newcastle disease virus			Avian influenza virus
	Treated	Control	RFa	Treated	Control	RF
0%	<2.50±0.00	7.67±0.88	>5.17±0.88*	<2.50±0.00	6.25±0.25	>3.75±0.25*
33%	<2.50±0.00	7.08±1.28	>4.58±1.28*	<2.50±0.00	6.50±0.25	>4.00±0.25*

^aRF=Reduction factor,

^*Inactivation regarded as effective when RF was ≥3 log₁₀. TCID₅₀=50% tissue culture infective dose