Virus | Predominant season | Incubation period | Common modes of transmission in order of frequency | Age | Duration | Possibility of transient lactose intolerance¶ | Other features |
Rotavirus |
| 1 to 3 days |
| 6 to 24 months | 5 to 7 days | Yes |
|
Norovirus |
| 12 to 48 hours |
| All ages | 1 to 4 days | No |
|
Sapovirus |
| 1 to 2 days |
| Infants and toddlers | 3 to 4 days |
| |
Astrovirus |
| 4 to 5 days |
| All ages | 5 to 6 days | Yes |
|
Enteric adenovirus (types 40 and 41) |
| 3 to 10 days |
| Children | 6 to 9 days | Yes |
|
SARS-CoV-1: severe acute respiratory syndrome coronavirus 1; SARS-CoV-2: severe acute respiratory syndrome virus 2.
* Viruses that typically have extraintestinal manifestations (eg, coxsackievirus, echovirus, poliovirus, SARS-CoV-1, SARS-CoV-2, influenza virus type B) also may cause gastroenteritis.
¶ It is not necessary to switch to lactose-free formula.