Table 1.

Comparison of pneumonia associated with S. aureus growth during period I and period II after promotion of hand washing and renovation of the unit.

Admitted Patients	Total cases of Pneumonia	Pneumonia due to other bacteria	Pneumonia due to S. aureus	Pneumonia due to S. aureus PVL+	Mortality PVL+	Mortality due to other bacteria
Period I, n= 235	74/235 (31%)	46/74 (62%)	28/74 (38%)	17/28 (61%)	15/17 (88%)	4/46 (9%)
Period II, n=218	23/218 (11%)	16/23 (70%)	7/23 (30%)	2/7 (29%)	2/2 (100%)	2/16 (13%)

There was a statistically significant difference between the mortality rates of patients infected with PVL producing S aureus compared to the mortality caused by other bacteria (P < 0.0001)