Table 1. Comparison of the immediate meteorological parameters preceding the diagnosis of bloodstream infection with overall data from the study period. Hospital das Clínicas from Faculdade de Medicina de Botucatu. January 2005 – December 2010.

Category	Number of observations	Temperature (°C)		Relative humidity (%)
		Average	Standard error	Average	Standard error
Overall data (reference)	2,815	20.99	2.66	70.20	10.76
Fungi	204	19.66	2.34	66.74	12.37
Bacteria	1,417	21.84	2.74	71.29	10.27
Gram-positive cocci	627	20.93	2.83	73.40	8.55
Gram-negative bacilli	790	21.76	2.51	69.91	11.18
Acinetobacter baumannii	177	22.99	2.62	63.82	10.23

Note: For the purpose of this study, immediate parameters indicate temperature and relative humidity for the seven days preceding the collection of blood cultures. The overall data consisted of the moving average to seventh order for each day of the study period.

Bold values indicate statistical significance.