Rotavirus in New Zealand 2015

Monday 23rd September 2019


Summary

A three dose schedule of the oral rotavirus vaccine RotaTeq® was added to the national childhood immunisation schedule on 1 July 2014. This report presents information on rotavirus infections from a variety of sources, including national hospital discharges, sentinel hospital-based surveillance, community and hospital laboratory testing and laboratory genotyping.

Rotavirus hospitalisation rates for children aged under 5 years declined by 85% in 2015 compared with the previous five-year average (2010–2014). In addition, the proportion of all gastroenteritis faecal samples that were positive for rotavirus decreased from a peak of 12–14% pre-vaccine to less than 3% following vaccine introduction.

G12P[8] was the predominant (47.5%) rotavirus genotype detected in 2015. Three rotaviruses, G1P[not typed], G1P[8] and GntP[8] were identified as vaccine-like and were all from partially immunised children. There was a significant decrease in rotavirus infections and in rotavirus as a proportion of all gastroenteritis.

From 1 July 2017, New Zealand will change to the monovalent vaccine Rotarix® with a two-dose schedule. Surveillance of rotavirus infections will be important to monitor trends of severe rotavirus infection and vaccine selection pressure on rotavirus genotypes.

Note: this report has been updated since it was originally published on 22 December 2016.  The only difference is in table 12 where two cases with genotype G12P[8] previously reported as fully immunised have been changed to not immunised.

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Report:

Rotavirus in New Zealand 2015

 

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Rotavirus in New Zealand 2015

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