Monthly Notifiable Disease Surveillance Report - Apr 2018

Wednesday 24th October 2018


Key notifiable disease trends

Hepatitis A: 10 cases (9 confirmed and 1 under investigation) were notified in April 2018 compared with 2 cases notified in April 2017. One case was hospitalised. The majority of cases were reported from Southern DHB (7 cases, 70.0%), and were linked to an outbreak at a childcare centre.


Measles: 17 confirmed cases notified in April 2018 (Figure 1). All but 2 cases were linked to a measles outbreak associated with Queenstown and Christchurch airports. The genotype was reported as B3. This strain was introduced into Victoria, Australia, from Malaysia in early March 2018.


Meningococcal disease: 8 confirmed cases notified in April 2018, a non-significant increase from the same month in 2017 (5 confirmed cases). The strain types were identified as group W (4 cases), group B (2 cases, including one case of B:P1.7-2,4, previously known as the 'NZ epidemic strain'), and group C (2 cases). There have been 29 confirmed cases notified for the period ending 30 April, 2018, compared with 18 confirmed cases notified for the same period in 2017, a non-significant increase. Nine of these cases were identified as group W compared with 1 group W case notified for the same period in 2017, a significant increase. A marked increase in group W cases has been reported in Australia since 2014 and in the United Kingdom since 2012. More information can be found here:
https://surv.esr.cri.nz/surveillance/NZPHSR.php?we_objectID=4729.

Mumps: 52 cases (19 confirmed, 31 probable and 2 under investigation) were notified in April 2018 compared with 28 cases notified in April 2017. The majority were notified in the Auckland region where there has been an outbreak since September 2016. Mumps notifications have continued to decrease since the peak in October 2017 (276 cases) (Figure 2).

Pertussis: 171 cases (93 confirmed, 64 probable, 4 suspect and 10 under investigation) notifications in April 2018 compared with 307 in March 2018 (Figure 3). From January to April 2018 the highest rates were in the <1 year (125.5 per 100,000) and 1–4 years (79.9 per 100,000) age groups. A national outbreak is ongoing. A fortnightly pertussis report is published here: https://surv.esr.cri.nz/surveillance/PertussisRpt.php.

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Report:

Monthly Notifiable Disease Surveillance Report - Apr 2018

Tables:

Monthly National Tables - April 2018

Monthly DHB Tables - April 2018

Monthly Rolling Tables - April 2018

Monthly DHB Rolling Tables - April 2018

 

DOWNLOADS

Monthly Notifiable Disease Surveillance Report - Apr 2018

Tables:

Monthly National Tables - April 2018

Monthly DHB Tables - April 2018

Monthly Rolling Tables - April 2018

Monthly DHB Rolling Tables - April 2018

Ph: +64 4 914 0700 Fax: +64 4 914 0770 Email: survqueries@esr.cri.nz