Table 2.

Sample appearance after 10 weeks of incubation

Sample ID	Temperature (°C)	Precipitate at bottom of vial (qualitative relative amount)	Solution appearancea
B	2–8	+	Clear
	20	+	Clear
	40	++	Clear
A	2–8	+	Clear
	20	+	Clear
	40	+++	Clear
C	2–8	+++	Very hazy
	20	−	Hazy
	40	+++	Clear
B5	2–8	+	Clear
	20	−	Hazy
	40	+++	Clear
B7	2–8	+	Clear
	20	+	Hazy
	40	++	Clear
B9	2–8	+	Hazy
	20	+	Hazy
	40	++	Hazy, yellow tint

^aAppearance above any precipitate at the bottom of the vial