Table 2.

Indoor air bacterial (37 ◦C) concentrations (CFU/m³) during seasonal samplings

Sl. No	Location	Bacterial count (CFU/m3)-AM Mean ± SD				Bacterial count (CFU/m3)-PM Mean ± SD				Season effect p value
		Fall	Winter	Spring	Summer	Fall	Winter	Spring	Summer	Am	Pm
3	Outside-inlet to pump room	21,000 ± 0	3185 ± 315	438 ± 87	6136 ± 13	21,000 ± 0	123 ± 123	735 ± 175	0	0	0
4	Basement-pump room	18,463 ± 1662	2625 ± 35	683 ± 18	6835 ± 42	10,885 + 105	14,543 ± 2958	473 ± 438	7525 ± 525	0	0.011
5	1st floor-lobby	11,900 ± 525	3780 ± 175	4901 ± 40	893 ± 88	13,388 ± 1663	1663 ± 53	1435 ± 315	595 ± 595	0	0.001
6	1st floor-meeting room	578 ± 158	1733 ± 52	11,731 ± 58	6305 ± 95	10,500 ± 0	9083 ± 8418	350 ± 350	2013 ± 1593	0.166	0.368
7	5th floor-office	11,410 ± 315	881 ± 8	420 ± 420	350 ± 350	11,900 ± 350	2660 ± 525	963 ± 18	1330 ± 175	0	0
8	9th floor-office	3185 ± 140	22,239 ± 27	473 ± 473	15,232 ± 98	1645 ± 35	1575 ± 315	455 ± 245	70 ± 70	0.093	0.012
9	10th floor-office	1680 ± 70	16,975 ± 1225	1085 ± 910	2363 ± 88	945 ± 210	53 ± 18	508 ± 438	578 ± 473	0	0.425
10	15th floor-office	1995 ± 245	2853 ± 53	1231 ± 8	1488 ± 263	58,106 ± 30	1243 ± 508	280 ± 210	123 ± 88	0.002	0.002
11	19th floor-gathering room	1278 ± 53	15,752 ± 10	3683 ± 33	10,332 ± 62	10,852 ± 45	25,655 ± 7630	630 ± 630	1190 ± 70	0.085	0.023
12	Roof top	3063 ± 788	35 ± 35	560 ± 560	1138 ± 88	24,502 ± 80	10,728 ± 10,693	893 ± 157	245 ± 35	0.041	0.545