Monthly Notifiable Disease Surveillance Report - Apr 2021

Monday 20th September 2021


Key Notifiable Disease Trends

Enteric Diseases: There was an increase in the incidence of notifiable enteric diseases in April 2021, compared with April 2020. The lower number of cases seen in April 2020 coincides with New Zealand introducing stringent measures against COVID-19, such as social distancing, increased hygiene practices, working from home and children not attending school or pre-school. All of these measures are also likely to prevent the spread of enteric diseases.

COVID-19: There were 116 cases of COVID-19 reported in April 2021 (115 confirmed and 1 under investigation) compared with 743 for the same month in 2020. Of the 115 confirmed cases, 111 (96.5%) were in managed isolation/quarantine (MIQ) facilities at the time of diagnosis, one was a historical community case, two were MIQ workers and one was an aircraft cleaner. One case was hospitalised, and no deaths were reported. More information can be found on the ESR COVID-19 dashboard.

Haemophilus influenzae serotype b disease: A case of Haemophilus influenzae serotype b (Hib) disease was reported in April 2021. The case was aged 1–4 years, unvaccinated, and lives in an extended Christian community where there have been five cases since December 2020.

Meningococcal disease: There were six confirmed cases of meningococcal disease reported in April 2021, compared with no cases for the same month in 2020. There have been 12 cases for the year to date. The strain type was identified in five out the six April cases and all were group B; four cases with PorA type P1.7-12,14 and one with P1.7-2,4. Four cases were aged <1 year.

Salmonellosis: There were 85 cases of salmonellosis reported in April 2021, compared with 22 cases in April 2020 and 97 in April 2019. The cases were geographically dispersed, and ages ranged from 1 month to 85 years. Twenty-four (35.3%, 24/68) cases were hospitalised. A serotype was identified for 81 (95.3%) cases, and the most common serotype was Salmonella Typhimurium (40 cases).

OUTBREAKS

Clostridium perfringens infection: An outbreak of gastroenteritis due to Clostridium perfringens was reported from Southern DHB in April 2021, involving 27 prisoners (1 confirmed and 26 probable cases) from the Otago Corrections Facility. Information on food consumption within the incubation period was available for 12 cases. All 12 cases had consumed corned beef, including the confirmed case. The prison operates under an MPI-registered custom food control plan and MPI visited to assess food practices at the facility.

Salmonellosis: A further 12 cases of Salmonella Enteritidis sequence type 11 that were reported in April 2021 have been identified as belonging to the Enteritidis_2019_C_01 cluster reported last month. From January to April 2021, there have been 35 cases reported, with the majority (21/35 cases) in the Auckland region. This strain was first detected in 2019 in an outbreak associated with a restaurant in the Auckland region. Since May 2019, the total number of cases associated with this strain is 101. Case and environmental investigations are continuing.

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 - Apr 2021

Tables:

Monthly National Tables - April 2021 (.xlsx)

Monthly DHB Tables - April 2021 (.xlsx)

Monthly Rolling Tables - April 2021 (.xlsx)

 

DOWNLOADS

Monthly Notifiable Disease Surveillance Report - Apr 2021

Tables:

Monthly National Tables - April 2021 (.xlsx)

Monthly DHB Tables - April 2021 (.xlsx)

Monthly Rolling Tables - April 2021 (.xlsx)

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