Table 3

Percentiles of the time of symptom onset and dispersion for disease distributions
Estimate (95% CI) of time of symptom onset (days)* Dispersion (95% CI)
5th percentile 25th percentile 50th percentile (median) 75th percentile 95th percentile
Astrovirus - 4.0 (3.5-4.9) 4.5 (3.9-5.2) 5.3 (4.4-5.8) - 1.22 (1.04-1.30)
Caliciviruses
Noroviruses** 0.5 (0.5-0.5) 0.9 (0.8-0.9) 1.2 (1.1-1.2) 1.7 (1.6-1.7) 2.6 (2.6-2.8) 1.64 (1.61-1.71)
Genogroup Iα 0.4 (0.4-0.5) 0.8 (0.7-0.8) 1.1 (1.1-1.2) 1.6 (1.6-1.7) 3.0 (2.8-3.2) 1.82 (1.75-1.90)
Genogroup IIβ 0.6 (0.5-0.6) 0.9 (0.9-1.0) 1.2 (1.2-1.3) 1.6 (1.6-1.7) 2.5 (2.4-2.6) 1.56 (1.49-1.62)
Sapoviruses*** 0.9 (0.7-1.0) 1.3 (1.1-1.4) 1.7 (1.5-1.8) 2.3 (2.0-2.4) 3.3 (2.7-3.8) 1.48 (1.36-1.61)
Rotavirus - 1.6 (1.1-1.9) 2.0 (1.4-2.4) 2.5 (1.8-3.0) - 1.37 (1.25-1.73)

*Based on a log-normal distribution of the incubation period; 5th and 95th percentiles are not presented for viruses with fewer than 20 observations. ** The Genogroups I and II group contains all “Norwalk-like viruses” including Norwalk, Montgomery County, Snow Mountain, Hawaii, Mexico, and other antigenically related strains. α The prototype strain for Genogroup I is the Norwalk virus. This group contains all strains antigenically related to the Norwalk virus, which are collectively termed “noroviruses”. β The noroviruses in Genogroup II are more closely related to the noroviruses in Genogroup I than the sapoviruses, however are antigenically distinct from viruses in both groups. The prototype virus for Genogroup II is the Snow Mountain Agent. *** The prototype virus for the sapoviruses is the Sapporo virus. This group contains all strains antigenically related to the Sapporo virus, which are collectively termed “sapoviruses”.

Lee et al.

Lee et al. BMC Infectious Diseases 2013 13:446   doi:10.1186/1471-2334-13-446

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