Table 2. Findings of visual inspection and Tyndall beam in solutions.

Drug	Colour/Clarity (White background)				Tyndall beam (Black background)
	0 hour	1 hour	2 hour	4 hour	0 hour	1 hour	2 hour	4 hour
Tigecycline (1 mg/mL)A1	Yellow/Clear	Yellow/Clear	Yellow/Clear	Yellow/Clear	N	N	N	N
Tigecycline (0.5 mg/mL)A2	Yellow/Clear	Yellow/Clear	Yellow/Clear	Yellow/Clear	N	N	N	N
Metronidazole and sodium chloride injectionB	Colourless/Clear	Colourless/Clear	Colourless/Clear	Colourless/Clear	N	N	N	N
MeropenemC	Colourless/Clear	Colourless/Clear	Colourless/Clear	Colourless/Clear	N	N	N	N
Imipenem and cilastatinD	Colourless/Clear	Colourless/Clear	Colourless/Clear	Colourless/Clear	N	N	N	N
Fosfomycin sodiumE	Colourless/Clear	Colourless/Clear	Colourless/Clear	Colourless/Clear	N	N	N	N
AztreonamF	Colourless/Clear	Colourless/Clear	Colourless/Clear	Colourless/Clear	N	N	N	N
VancomycinG	Colourless/Clear	Colourless/Clear	Colourless/Clear	Colourless/Clear	N	N	N	N
CAZ-AVI H	Colourless/Clear	Colourless/Clear	Colourless/Clear	Colourless/Clear	N	N	N	N
Calcium chloride with composite potassium hydrogen phosphateI	White/Turbid	White/Precipitate	White/Precipitate	White/Precipitate	P	P	P	P
10 µm latex particles reference materialJ	Colourless/Clear				P
25 µm particle count reference materialK	Colourless/Clear				P

A1-G: the combinations of CAZ-AVI with selected drugs separately; H: negative control, 25 mg/ml CAZ-AVI in NS; I: positive control, calcium chloride with composite potassium in NS; J: 57 positive control, 10 μm latex particles reference material; K: positive control, 25 μm particle count reference material; N: Tyndall negative; P: Tyndall positive.