Table 4.

Distribution of pathogens isolated from the environment among different ICUs

Organism	ICU									Total n = 475
	Trauma n = 67	Post operative n = 48	Chest n = 54	Medicine n = 53	General n = 50	Neurological n = 51	Coronary n = 50	Tropical n = 52	Neurosurgical n = 50
MS CNS	9(13.4%)	2(4.2%)	5(9.3%)	1(1.9%)	3(6%)	3(5.9%)	1(2%)	0(.0%)	4(8%)	28(5.9%)
MR CNS	4(6%)	0(.0%)	6(11.1%)	6(11.3%)	4(8%)	2(3.9%)	3(6%)	2(3.8%)	0(.0%)	27(5.7%)
MSSA	12(18%)	20(41.7%)	2(3.7%)	5(9.4%)	0(.0%)	3(5.9%)	0(.0%)	0(.0%)	0(.0%)	42(8.8%)
MRSA	0(.0%)	1(2.1%)	6(11.1%)	1(1.9%)	2(4%)	4(7.8%)	3(6%)	2(3.8%)	5(10%)	24(5.1%)
Enterococcus spp.	1(1.5%)	2(4.2%)	1(1.9%)	0(.0%)	0(.0%)	1(2%)	0(.0%)	0(.0%)	0(.0%)	5(1.1%)
E coli	16(23.9%)	9(18.8%)	1(1.9%)	1(1.9%)	1(2%)	3(5.9%)	1(2%)	0(.0%)	0(.0%)	32(6.7%)
Klebsiella pneumoniae	4(6%)	2(4.2%)	15(27.8%)	2(5.7%)	1(2%)	5(9.8%)	3(6%)	0(.0%)	4(8%)	36(7.6%)
Pseudomonas aeruginosa	5(7.5%)	0(.0%)	3(5.6%)	2(3.8%)	3(6%)	2(3.9%)	1(2%)	0(.0%)	1(2%)	17(3.6%)
Candida spp.	0(.0%)	0(.0%)	0(.0%)	3(5.7%)	0(.0%)	0(.0%)	0(.0%)	1(1.9%)	0(.0%)	4(0.8%)
Nonlactose fermenter	0(.0%)	0(.0%)	3(5.6%)	10(19%)	14(28%)	0(.0%)	0(.0%)	0(.0%)	1(2%)	28(5.9%)
Proteus spp.	4(6%)	0(.0%)	0(.0%)	0(.0%)	0(.0%)	6(11.8%)	9(18%)	3(5.9%)	0(.0%)	22(4.6%)
Contamination rate	55(82%)	36(75%)	42(77.8%)	31(58.4%)	28(56%)	29(56.8%)	21(42%)	8(15.3%)	15(30%)	265(55.8%)

*(n = number of samples obtained from each ICU, percentage is calculated according to number of samples obtained from each ICU