Imported arboviral infections in New Zealand, 2001 to 2017: A risk factor for local transmission

Over the last decade and following international trends, cases of mosquito-borne arboviral infections, notably dengue fever, chikungunya and Zika, have increased among travellers arriving in New Zealand, but no locally acquired cases have been identified. Imported cases are characterised and examine...

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Bibliographic Details
Published in:Travel medicine and infectious disease 2021-05, Vol.41, p.102047-102047, Article 102047
Main Authors: Ammar, Sherif E., Mclntyre, Mary, Baker, Michael G., Hales, Simon
Format: Article
Language:English
Subjects:
Aquatic insects
Arboviruses
Dengue
Dengue fever
Disease
Generalized linear models
Human diseases
Infections
Infectious diseases
Islands
Laboratories
Mosquitoes
New Zealand
Notifications
Risk
Risk factors
Seasonal variations
Seasonality
Travel
Travel medicine
Trends
Vector-borne diseases
Vectors
Zika virus
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Summary:Over the last decade and following international trends, cases of mosquito-borne arboviral infections, notably dengue fever, chikungunya and Zika, have increased among travellers arriving in New Zealand, but no locally acquired cases have been identified. Imported cases are characterised and examined to identify trends and features that might assist in reducing transmission risk from travellers. Information on traveller arrivals, notified cases and risk factors for disease acquisition were obtained from national sources. Trends in importation rates, seasonality are described and relationships of notifications with traveller arrivals were examined with a negative binomial regression model. There was a significant increase in dengue notifications combined with the emergence of Zika and chikungunya. Most notifications were from arrivals in Auckland from Pacific Islands during summer and early autumn. Overseas travel from New Zealand, particularly to the Pacific Islands and Southeast Asia, involves a risk of arboviral infection. The repeated introduction of arboviruses to New Zealand also increases the risk of local transmission in a country that has vector capable and vector potential mosquitoes, as well as an increasingly suitable climate for new vectors to establish.
ISSN:1477-8939
1873-0442
DOI:10.1016/j.tmaid.2021.102047