An outbreak of acute norovirus gastroenteritis in a boarding school in Shanghai: a retrospective cohort study

BMC Public Health

Table 1 Total specimens for laboratory test during the outbreak investigation

Sampling subjects	No. of specimens	Sampling date	No. of positive specimens
Cases	12	November 22^nd	2
	5	November 24^th	1
	4	November 25^th	1
	1	November 26^th	0
	8	November 28^th	2
	3	November 29^th	1
	3	November 30^th	2
	2	December 3^rd	2
Asymptomatic food handlers*	10	November 22^nd	4
Asymptomatic food handlers*	40	November 23^rd	5
Environment surfaces	153	November 22^nd	8
Drinking water	2	November 22^nd	0
Food samples	10	November 22^nd	0

ISSN: 1471-2458