Page 44 - Timeliness of Infectious Disease Notification & Response Systems - Corien Swaan

42 Chapter 2
widely, between 0.4% for shigellosis and 90.3% for HAV infection. Not reported within two incubation periods were 97.1% of shigellosis cases, 76.2% of cases of EHEC/STEC infection, 13.3% of meningococcosis cases, 15.7% of measles cases, and 29.7% of typhoid fever cases.
Table 1. Reporting time interval from symptom onset and from diagnosis until notifica- tion (Po and Pd) for infectious disease notifications in relation to the incubation period and in relation to the time after diagnosis, with the values assuming zero delay in labo- ratory reporting (underlined figures in italics).
median percentage percentage
Po notifications notifications m (days) ≤ 1IP (%) ≤ 2IP (%)
median Pd (days)
percentage notifications m >3days after diagnosis (%)
42 0
33.3 11 12 2
15.7 0 22.3 0 20.9 1
Shigellosis (IP 2 days) n=1910
EHEC/STEC (IP 3-4 days) n=432
Meningococ- cosis
(IP 3-4 days) n=1263
Measles
(IP 10 days) n=134
Typhoid fever (IP 11 days) n=166
HAV infection (IP 28 days) n=1518
15 11
12 8 3 2
8 6 16 12 9 8
0.4 5.9 2.9 12.9
2.3 10.6 23.8 43.2 57.1 71.2 86.7 94
67.2 71.6 84.3 85.8 33.5 47.5 70.3 77.2 90.3 93.1 97.2 98
53
49 1 19 0
0 0 82 650
Po = period from symptom onset until notification
Pd = period from laboratory diagnosis until notification IP = incubation period
n = total number of notifications
m = number of missing i.e. excluded notifications