TY - JOUR
T1 - Norovirus outbreak in a cruise ship sailing around the British Isles
T2 - Investigation and multi-agency management of an international outbreak
AU - Vivancos, Roberto
AU - Keenan, Alex
AU - Sopwith, Will
AU - Smith, Ken
AU - Quigley, Catherine
AU - Mutton, Ken
AU - Dardamissis, Evdokia
AU - Nichols, Gordon
AU - Harris, John
AU - Gallimore, Christopher
AU - Verhoef, Linda
AU - Syed, Qutubuddin
AU - Reid, John
PY - 2010/6
Y1 - 2010/6
N2 - Objective: Managing an outbreak of gastroenteritis (GI) on board a cruise ship while minimising disruption to passengers' on board and shore visit activities is difficult. For this reason it is important to understand the complex patterns of transmission in a closed community. We describe the epidemiological investigation of an outbreak of norovirus during an international cruise. Methods: A retrospective cohort study was conducted using information from lists routinely maintained by the travel company, including the passenger manifest, and organised coach tour lists. Information on air-conditioning (AC) systems was used to assess the possible sources of exposures. Findings: Of the 1194 passengers 191 (16%) and 5 crew (<1%) became ill with GI symptoms. The attack rate was higher amongst passengers whose cabin was on the main deck (RR 3.41, 95% CI 1.47-7.94) that houses both passengers' cabins and leisure facilities including shops. Passengers who went on one of the organised coach tours where there were symptomatic passengers were at an increased risk of infection (RR 2.14, CI 1.51-3.03). Analysis of the 56 AC sections on the ship and did not detect an association with infection. Conclusions: Patterns of transmission of norovirus on a cruise ship are complex. Our study suggests infections are more likely among those passengers staying in areas of the ship that are highly transited or used for communal activities and more difficult to clean. Emphasis on the importance of early reporting of symptoms can help minimise transmission. Internationally agreed guidelines on the management of outbreaks on cruise ships are needed.
AB - Objective: Managing an outbreak of gastroenteritis (GI) on board a cruise ship while minimising disruption to passengers' on board and shore visit activities is difficult. For this reason it is important to understand the complex patterns of transmission in a closed community. We describe the epidemiological investigation of an outbreak of norovirus during an international cruise. Methods: A retrospective cohort study was conducted using information from lists routinely maintained by the travel company, including the passenger manifest, and organised coach tour lists. Information on air-conditioning (AC) systems was used to assess the possible sources of exposures. Findings: Of the 1194 passengers 191 (16%) and 5 crew (<1%) became ill with GI symptoms. The attack rate was higher amongst passengers whose cabin was on the main deck (RR 3.41, 95% CI 1.47-7.94) that houses both passengers' cabins and leisure facilities including shops. Passengers who went on one of the organised coach tours where there were symptomatic passengers were at an increased risk of infection (RR 2.14, CI 1.51-3.03). Analysis of the 56 AC sections on the ship and did not detect an association with infection. Conclusions: Patterns of transmission of norovirus on a cruise ship are complex. Our study suggests infections are more likely among those passengers staying in areas of the ship that are highly transited or used for communal activities and more difficult to clean. Emphasis on the importance of early reporting of symptoms can help minimise transmission. Internationally agreed guidelines on the management of outbreaks on cruise ships are needed.
KW - Cruise ship
KW - International
KW - Management
KW - Norovirus
KW - Outbreak
KW - Viral gastroenteritis
UR - http://www.scopus.com/inward/record.url?scp=77953325440&partnerID=8YFLogxK
U2 - 10.1016/j.jinf.2010.03.018
DO - 10.1016/j.jinf.2010.03.018
M3 - Article
C2 - 20359496
AN - SCOPUS:77953325440
SN - 0163-4453
VL - 60
SP - 478
EP - 485
JO - Journal of Infection
JF - Journal of Infection
IS - 6
ER -