. 2021 Feb 6;22(4):1641. doi: 10.3390/ijms22041641

Table 4.

Microbiological purity test of gel formulations.

Parameter	PN-EN ISO Requirements	ZnGly Gel (A)	ZnHis Gel (B)	Placebo Gel
Enumeration of aerobic mesophilic microorganisms	1 × 10³ CFU/1 g/1 mL	<1 × 10 ¹ CFU/1 g/1 mL	<1 × 10¹ CFU/1 g/1 mL	<1 × 10¹ CFU/1 g/1 mL
Enumeration of yeast and mold	1 × 10³ CFU/1 g/1 mL	<1 × 10 ¹ CFU/1 g/1 mL	<1 × 10¹ CFU/1 g/1 mL	<1 × 10¹ CFU/1 g/1 mL
Detection of mold spores	Absence in 1 g/1 mL	Absence in 1 g/1 mL	Absence in 1 g/1 mL	Absence in 1 g/1 mL
Detection of Pseudomonas aeruginosa	Absence in 1 g/1 mL	Absence in 1 g/1 mL	Absence in 1 g/1 mL	Absence in 1 g/1 mL
Detection of Escherichia coli	Absence in 1 g/1 mL	Absence in 1 g/1 mL	Absence in 1 g/1 mL	Absence in 1 g/1 mL
Detection of Staphylococcus aureus	Absence in 1 g/1 mL	Absence in 1 g/1 mL	Absence in 1 g/1 mL	Absence in 1 g/1 mL
Detection of Candida albicans	Absence in 1 g/1 mL	Absence in 1 g/1 mL	Absence in 1 g/1 mL	Absence in 1 g/1 mL