| norwalk virus-associated gastroenteritis traced to ice consumption aboard a cruise ship in hawaii: comparison and application of molecular method-based assays. | investigation of an outbreak of acute nonbacterial gastroenteritis on a cruise ship provided an opportunity to assess new molecular method-based diagnostic methods for norwalk virus (nv) and the antibody response to nv infection. the outbreak began within 36 h of embarkation and affected 30% of 672 passengers and crew. no single meal, seating, or food item was implicated in the transmission of nv, but a passenger's risk of illness was associated with the amount of ice (but not water) consumed (c ... | 1994 | 8150941 |