Monthly Notifiable Disease Surveillance Report - Aug 2018

Wednesday 24th October 2018


Key notifiable disease trends

Enteric Diseases: Enteric infections are the most common notifiable diseases, and several are increasing in incidence. This increase is partly due to changes in laboratory testing practices with a shift from culture methods to multiplex PCR, which tests for several diseases at the same time. This means more diseases are likely to be detected and in a timelier manner. For further information, see the 2016 Annual Notifiable Disease Report Commentary.

Meningococcal Disease: There have been 15 cases of group W meningococcal disease from January to August 2018, compared with six for the same period in 2017. More information on group W meningococcal disease can be found in the March 2018 NZ Public Health Surveillance Report and in the May 2018 immunisation update.
Mumps: There were 24 cases (7 confirmed, 14 probable and 3 under investigation) of mumps notified in August 2018, compared with 156 cases in August 2017. Monthly mumps notifications have continued to decrease since the peak in October 2017 when 277 cases were reported (Figure 1).

Pertussis: There were 182 cases (82 confirmed, 74 probable, 10 suspect and 16 under investigation) of pertussis notified in August 2018, compared with 137 cases for the same period in 2017. While pertussis cases have been decreasing since the peak in January 2018, there is a possibility that cases may increase again, as in the 2012 outbreak (Figure 2). A national outbreak is ongoing. For more information see the latest Pertussis Report.

Salmonellosis: There were 138 cases (137 confirmed, 1 under investigation) of salmonellosis notified in August 2018, compared with 104 cases for the same period in 2017. Almost a third (31.2%) of cases were from Canterbury or Southern DHBs (25 and 18 cases, respectively). Of the cases where overseas travel was known, 58.6% (51 cases) had travelled overseas during the incubation period; a higher proportion than in August 2017 (42.4%). The most common countries visited were Indonesia (13 cases), Cambodia (9 cases), Fiji and Laos (7 cases each), and Thailand (5 cases).

Toxic shellfish poisoning: A suspect case of toxic shellfish poisoning was reported during August. The case, a 43-year-old male from the Bay of Plenty, was admitted to hospital after consuming pipis collected from the Waihi estuary. There was a warning in place on the date that the shellfish were collected advising people not to eat shellfish from the estuary due the presence of toxic algae. Extensive testing of shellfish and algae from the estuary has not confirmed either toxic algae or biotoxin.

Tuberculosis disease: Thirty-six cases of tuberculosis disease (23 confirmed, 3 probable and 10 under investigation) were notified in August 2018, compared with 15 cases for the same period in 2017. Over half (52.8%, 19/36) of the cases were reported from the Auckland region. Of the cases where the country of birth was recorded, 68.0% (17/25) were born overseas.

Note: Click on the document links below to open. These documents are in PDF format. You will need to download the free Adobe Acrobat Reader to view them.

Report:

Monthly Notifiable Disease Surveillance Report - Aug 2018

Tables:

Monthly National Tables - Aug 2018 (.xlsx)

Monthly DHB Tables - Aug 2018 (.xlsx)

Monthly Rolling Tables - Aug 2018 (.xlsx)

 

DOWNLOADS

Monthly Notifiable Disease Surveillance Report - Aug 2018

Tables:

Monthly National Tables - Aug 2018 (.xlsx)

Monthly DHB Tables - Aug 2018 (.xlsx)

Monthly Rolling Tables - Aug 2018 (.xlsx)

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