Table 2.

Number of signals by data source and detection algorithm, investigated during the surveillance period, 4–15 July 2005, Scotland

^*Exceedance method by Farrington.

^†Cumulative sum method.

^‡NHS 24 is a national telephone helpline for health advice and patients' referral.

^§Combined findings from the general medical practitioners in Auchterarder and in Dunblane.

^¶Combined findings from the microbiology laboratories in Dundee, Stirling, and Perth.

^‖Combined findings from the hospital accident and emergency departments in Perth and Dundee.