Monthly Notifiable Disease Surveillance Report - Nov 2014

Wednesday 18th September 2019


Key notifiable disease trends

Campylobacter: 776 cases of campylobacteriosis were notified in November 2014 compared to 731 cases notified during the same month of the previous year (Figure 1). For the 12 month period ending 30 November 2014, the highest rates were in South Canterbury (292.9 per 100 000 population, 167 cases), Waikato (207.4 per 100 000 population, 773 cases), and Southern (190.8 per 100 000 population, 591 cases) DHBs compared to a national rate of 151.8 per 100 000. Five Campylobacter outbreaks were reported in November including three finalised outbreaks (6 cases) and two interim outbreaks (case numbers not yet established).

Chikungunya fever: Seven cases of chikungunya fever (5 confirmed and 2 probable) were notified in November 2014. All cases reported overseas travel during the incubation period to Samoa (4 cases), American Samoa, Antigua and Barbuda, Barbados, and French Polynesia (1 case each). One case reported travel to more than one country.

Cryptosporidiosis: 70 cases of cryptosporidiosis were notified in November 2014 compared to 85 cases notified during the same month of the previous year. The cases ranged in age from 16 months to 84 years, with the highest numbers of cases in the 1–4 years (23 cases) and 20–29 years (17 cases) age groups. The highest numbers of cases were reported from Waikato and Canterbury (12 cases each) DHBs. Among the cases where risk factor information was recorded, 64.7% (22/34) had contact with farm animals, 50.0% (15/30) had consumed untreated water, 41.9% (13/31) had contact with faecal matter, and 38.5% (15/39) had attended school, preschool or childcare. Three interim Cryptosporidium outbreaks were reported in November (case numbers not yet established).

Haemophilus influenza serotype b disease: One case of H. influenza serotype b disease (still under investigation) was notified in November 2014 bring the year to date total to four compared to two cases in 2013. The case was a male in the 60–69 years age group from Counties Manukau DHB.

Hepatitis NOS: One case of hepatitis NOS, still under investigation was notified in November 2014. The case was a female in the 40–49 years age group from Southern DHB.

Measles: Three cases of measles were notified in November 2014 compared with zero cases notified during the same month of the previous year. All cases were from Taranaki DHB and were linked to an outbreak. Two cases were in the 1–4 years and one case in the 30–39 years age groups. One of the cases in the 1–4 years age group had received one dose of MMR vaccine. The other was not vaccinated. Two cases reported overseas travel during the incubation period and one reported contact with another measles case in the previous three weeks. One interim measles virus outbreak was reported in November (case numbers not yet established).

Mumps: Four cases of mumps were notified in November 2014 compared to two cases notified during the same month of the previous year. The cases were in the 15–19 years (2 cases), 1–4 years and 30–39 years age groups (1 case each). The cases were from Auckland, Counties Manukau, Hawke’s Bay and Wairarapa DBs (1 case each). One case had received one dose of MMR vaccine and another case had received two doses of vaccine. Two further cases reported having been vaccinated, but no dose information was available.

Rickettsial disease: Three cases of murine typhus were notified in November 2014. The cases were males in the 30–39 years (2 cases) and 50–59 years (1 case) age groups. Two cases were hospitalised. The occupation was recorded for two of the cases as farmer and a farm hand. One further case lives on a lifestyle block.

Salmonellosis: 61 cases of salmonellosis were notified in November 2014 compared to 94 cases notified during the same month of the previous year. The highest numbers of cases were reported from Auckland (12 cases), and Waitemata (8 cases) DHBs. The cases ranged in age from four months to 89 years, with the highest numbers of cases in the 50–59 years (11 cases), and 5–9 years (9 cases) age groups. Three cases were hospitalised. The Salmonella serotypes was identified in 57 (93.4%) of the cases. The most common was S. Typhimurium phage type 56 variant (8 cases), S. enterica subsp. enterica (I) ser. 4,[5],12 : i : -, and S. Weltevreden (4 cases each). Uncommon Salmonella serotypes confirmed this month included S. Kisangani and S. Papuana (1 case each). Among the cases for which risk factor information was recorded 48.0% (12/25) had travelled overseas, 45.0% (9/20) had consumed food from a food premises, and 41.2% (7/17) had contact with farm animals. Two Salmonella outbreaks were reported in November including one finalised outbreak (2 cases) and one interim outbreak (case numbers not yet established).

VTEC/STEC infection: 12 cases of VTEC/STEC infection were notified in November 2014 compared to six cases notified during the same month of the previous year. The highest numbers of cases were reported from Waitemata (3 cases), Canterbury and Southern (2 cases each) DHBs. The highest number of cases occurred in the 1–4 years age group (5 cases). The serotype/organism was identified by the Enteric Reference Laboratory for 10 cases of which 60.0% (6/10) were Escherichia coli O157:H7. Among the cases for which risk factor information was recorded, 57.1% (4/7) had contact with animals, 42.9% (3/7) attended school, pre-school or childcare, and 33.3% (2/6) had consumed non-habitual water supply.

Yersiniosis: 57 cases of yersiniosis were notified in November 2014 a decrease from 184 cases notified in the previous month (Figure 2). The highest numbers of cases were reported from Canterbury (14 cases), Auckland and Bay of Plenty (6 cases each) DHBs. The cases ranged in age from 10 months to 81 years, with the highest numbers of cases in the 50–59 years (10 cases), 20–29 years and 40–49 years (9 cases each) age groups. Six cases were hospitalised. The Yersinia species involved was identified in 49 (86.0%) of the cases: Yersinia enterocolitica (43 cases) and Y. pseudotuberculosis (6 cases). The most common Y. enterocolitica biotype reported was biotype 2 (12 cases) followed by biotype 1A (9 cases), biotype 4 (6 cases) and biotype 3 (5 cases). Among the cases for which risk factor information was recorded, 66.7% (18/27) had consumed food from a food premises. Of the 18 who had consumed food from a food premises, 50.0% (9/18) had consumed food from a supermarket. One interim Yersinia outbreak was reported in November (case numbers not yet established).

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Report:

Monthly Notifiable Disease Report - Nov 2014

Tables:

Monthly National Totals - Nov 2014

Monthly DHB Totals - Nov 2014

Monthly Rolling Totals - Nov 2014

 

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Monthly Notifiable Disease Report - Nov 2014

Tables:

Monthly National Totals - Nov 2014

Monthly DHB Totals - Nov 2014

Monthly Rolling Totals - Nov 2014

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