Wilson R, Anderson L J, Holman R C, Gary G W, Greenberg H B
Am J Public Health. 1982 Jan;72(1):72-4. doi: 10.2105/ajph.72.1.72.
An outbreak of gastroenteritis occurred at a Pennsylvania summer camp in July 1978. Symptoms included abdominal pain (81 per cent), nausea (72 per cent), and vomiting (53 per cent); upper respiratory infection symptoms occurred in 35 per cent of the campers. Illness was associated with consumption of five or more glasses of water or water-containing beverages. Stool cultures from affected persons were negative for bacterial pathogens; however, a fourfold or greater rise to the Norwalk agent was demonstrated in serum samples of three of three ill persons tested and in none of eight controls (p < .02). Campers ill during the first session who were also present during the second session did not become ill during the second session (p < .001). (Am J Public Health 1982; 72:72-74.)
1978年7月，宾夕法尼亚州的一个夏令营爆发了肠胃炎。症状包括腹痛（81%）、恶心（72%）和呕吐（53%）；35%的营员出现了上呼吸道感染症状。患病与饮用五杯或更多杯水或含水饮料有关。患病者的粪便培养物中未检测到细菌病原体；然而，三名患病者的血清样本中对诺沃克病毒的抗体呈四倍或更高倍数升高，而八名对照者中无一出现这种情况（p<0.02）。在第一期患病且第二期也在营地的营员在第二期没有再次患病（p<0.001）。（《美国公共卫生杂志》1982年；72:72 - 74）
