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Table 2
Antimicrobial activity of sulfur nanoparticles
Type of micro-organism	Microbial strain (μg/mL)	Zone of inhibition (mm)
Type of micro-organism	Microbial strain (μg/mL)	Sulfur synthesized in aqueous system (80–100 nm)^a	Sulfur nanoparticles (5–15 nm)^a
Bacteria	P. areuginosaNCIM 2036
	(i) 30	Nil	7.3
	(ii) 150	8.7	25
	S. areusNCIM 2079
	(i) 30	Nil	7.7
	(ii) 150	Nil	30
Yeast	C. albicansNCIM 3102
	(i) 30	Nil	8.3
	(ii) 150	7.1	10
	C. albicansNCIM 3466
	(i) 30	Nil	8.3
	(ii) 150	7.3	11
Fungi	A. spergillus flavusNCIM 535
	(i) 1,500	Nil	14
	(ii) 3,000	Nil	22.5
	A. nigerNCIM 545
	(i) 1,500	Nil	Growth retardation^b
	(ii) 3,000	Nil	Growth retardation^b

^aAverage particle size

^bFormation of spores was observed to be delayed by about 48 h

Deshpande et al. Nanoscale Research Letters 2008 3:221 doi:10.1186/1556-276X-3-221

Table 2