Table 3.

Carriage of Neisseria meningitidis by study month and hall status among first year undergraduate university students, 1997

Month	Type of hall	No of students		% carriage rate (95% CI)
		Swabbed	Positive for N meningitidis
October	Catered	1872	261	13.9 (12.4 to 15.1)
October	Self catered	358	37	10.3 (7.2 to 13.5)
November	Catered*	542	168	31.0 (27.1 to 34.9)
December	Catered*	653	223	34.2 (30.5 to 37.8)
December	Catered†	142	40	28.2 (20.8 to 35.6)
December	Self catered	149	36	24.2 (17.3 to 31.0)

^*Excludes results where 30% of students received ciprofloxacin. 

^†30% of students given ciprofloxacin in late October.