tetano
Editor, Senior Moderator
Emerg Infect Dis. 2013 Jun;19(6):925-31. doi: 10.3201/eid1906.111864.
Effect of travel on influenza epidemiology.
Belderok SM, Rimmelzwaan GF, van den Hoek A, Sonder GJ.
Abstract
To assess the attack and incidence rates for influenza virus infections, during October 2006-October 2007 we prospectively studied 1,190 adult short-term travelers from the Netherlands to tropical and subtropical countries. Participants donated blood samples before and after travel and kept a travel diary. The samples were serologically tested for the epidemic strains during the study period. The attack rate for all infections was 7% (86 travelers) and for influenza-like illness (ILI), 0.8%. The incidence rate for all infections was 8.9 per 100 person-months and for ILI, 0.9%. Risk factors for infection were birth in a non-Western country, age 55-64 years, and ILI. In 15 travelers with fever or ILI, influenza virus infection was serologically confirmed; 7 of these travelers were considered contagious or incubating the infection while traveling home. Given the large number of travelers to (sub)tropical countries, travel-related infection most likely contributes to importation and further influenza spread worldwide.
KEYWORDS:
Influenza, attack rate, epidemiology, incidence, prospective study, travel, viruses
PMID:
23735636
[PubMed - in process]
http://www.ncbi.nlm.nih.gov/pubmed/23735636
Effect of travel on influenza epidemiology.
Belderok SM, Rimmelzwaan GF, van den Hoek A, Sonder GJ.
Abstract
To assess the attack and incidence rates for influenza virus infections, during October 2006-October 2007 we prospectively studied 1,190 adult short-term travelers from the Netherlands to tropical and subtropical countries. Participants donated blood samples before and after travel and kept a travel diary. The samples were serologically tested for the epidemic strains during the study period. The attack rate for all infections was 7% (86 travelers) and for influenza-like illness (ILI), 0.8%. The incidence rate for all infections was 8.9 per 100 person-months and for ILI, 0.9%. Risk factors for infection were birth in a non-Western country, age 55-64 years, and ILI. In 15 travelers with fever or ILI, influenza virus infection was serologically confirmed; 7 of these travelers were considered contagious or incubating the infection while traveling home. Given the large number of travelers to (sub)tropical countries, travel-related infection most likely contributes to importation and further influenza spread worldwide.
KEYWORDS:
Influenza, attack rate, epidemiology, incidence, prospective study, travel, viruses
PMID:
23735636
[PubMed - in process]
http://www.ncbi.nlm.nih.gov/pubmed/23735636