Monthly Notifiable Disease Surveillance Report - Dec 2012

Tuesday 17th September 2019


Key notifiable disease trends

  • Campylobacteriosis: 712 cases of campylobacteriosis were notified in December 2012 compared to 971 cases notified during the same month of the previous year (Figure 1). For the 12 month period ending 31 December 2012, the highest rates were in South Canterbury (321.0 per 100 000 population, 181 cases), Canterbury (224.2 per 100 000 population, 1127 cases), and Southern (221.2 per 100 000 population, 678 cases) DHBs compared to a national rate of 159.7 per 100 000. Four Campylobacter outbreaks were reported in December including three finalised outbreaks (8 cases) and one interim outbreak (case numbers not yet established).

  • Cholera: One case of cholera was notified in December 2012, the case was subsequently made ‘not a case’ in January after further investigation.

  • Diphtheria: One case of cutaneous diphtheria was notified in December 2012. The case was a female in the 30-39 years age group from Auckland DHB. Laboratory confirmation is pending for the case.

  • Measles: One case of measles was notified in December 2012, the case was subsequently made ‘not a case’ in January after further investigation.

  • Toxic shellfish poisoning: 33 cases of toxic shellfish poisoning (29 paralytic shellfish poisoning and 4 toxic shellfish poisoning – type unspecified) were notified in December 2012. 51.5% (17/33) were hospitalised. Bay of Plenty had the highest number of cases of paralytic shellfish poisoning (19 cases), followed by Lakes (7 cases) DHB. All of the paralytic shellfish poisoning cases were linked to an outbreak associated with shellfish harvested recreationally from the Bay of Plenty coastline. All of the toxic shellfish poisoning – type unspecified cases were from Hutt Valley DHB. The cases had consumed mussels that were shop bought in the region.

  • Pertussis: 592 cases of pertussis were notified in December 2012, compared with 602 cases notified the previous month and 521 cases in the same month of the previous year. Thirty cases were hospitalised and no deaths were reported. There were 150 (25.3%) cases laboratory-confirmed by isolation of Bordetella pertussis from the nasopharynx. A further 126 (21.3%) cases were laboratory-confirmed by PCR. The highest number of cases was from Canterbury DHB (93), followed by Southern (64) and Waikato (61) DHBs. The cases ranged in age from one month to 85 years, with 21.3% (126/591 cases with a known age) under 5 years old (including 59 cases aged less than 1 year). The highest numbers of cases occurred in the 5-9 years (78), 40-49 years (75), 1-4 years (67), and 30-39 years (65) age groups. The vaccination status was recorded for 281 (47.5%) cases. Of these, 98 were reported as not vaccinated, 28 received one dose of vaccine, 17 received two doses of vaccine, 79 received three or more doses (including 11 who had received all five doses), and 59 were reported as being vaccinated but no dose information was available. Of the cases where the relevant information was recorded 44.4% (80/180) had contact with a laboratory-confirmed pertussis case, and 36.6% (132/361) attended school, pre-school or childcare. Two B. pertussis outbreaks involving four cases in total were reported in December.

  • Taeniasis: One confirmed case of taeniasis was notified in December 2012. The case was a male in the 30-39 years age group from Auckland DHB and was in Eritrea during the incubation period.

  • Tetanus: One case of non-fatal tetanus was notified in December 2012. The case was an unvaccinated male in the 5-9 years age group and was hospitalised.

  • VTEC/STEC infection: 19 cases of VTEC/STEC infection were notified in December 2012, one of these cases has since been made ‘not a case’ after further investigation. This compares with three cases notified in the same month of the previous year. The remaining 18 cases were from the following DHBs: Counties Manukau (5), Canterbury (4), Waitemata and Waikato (3 cases each), and Lakes, Bay of Plenty and Southern (1 case each). The highest number of cases occurred in the 50-59 years age group (5 cases). Four cases were hospitalised of which one had haemolytic uraemic syndrome. The serotype/organism was identified by the Enteric Reference Laboratory for fourteen cases: Escherichia coli O157:H7 (12 cases) and E. coli non-O157 (2 cases). Among the cases for which risk factor was recorded, 100.0% (5/5) had contact with animals, and 66.7% (4/6) had contact with a person with similar symptoms.

  • Yersiniosis: 42 cases of yersiniosis were notified in December 2012, two of these cases have since been made ‘not a case’ after further investigation. This compares with 53 cases notified in the previous month and 32 in the same month of the previous year (Figure 2). Waitemata DHB had the highest number of cases (7 cases), followed by Auckland and Capital and Coast (5 cases each), and Canterbury (4 cases) DHBs. The cases ranged in age from seven months to 92 years, with the highest numbers reported in the 1-4 years and 70+ years (7 cases each), 20-29 years (6), and under one year (5) age groups. Five cases were hospitalised. The biotype involved was identified in 27 (67.5%) of the cases: Yersinia enterocolitica biotype 4 (11 cases), Y. enterocolitica biotype 1A (9 cases), Y. enterocolitica biotype 2 (4 cases) and Y. enterocolitica biotype 3 (3 cases). Among the cases for which risk factor was recorded, 40.0% (4/10) consumed food from a food premises, 18.2% (2/11) had consumed untreated water, 16.6% (2/12) had contact with faecal matter, 14.3% (2/14) had attended school, pre-school or childcare, and 10.0% (1/10) had contact with farm animals.

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Report:

Monthly Notifiable Disease Surveillance Report - Dec 2012

Tables:

Monthly National Totals - Dec 2012

Monthly DHB Totals - Dec 2012

Monthly Rolling Totals - Dec 2012

 

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Monthly Notifiable Disease Surveillance Report - Dec 2012

Tables:

Monthly National Totals - Dec 2012

Monthly DHB Totals - Dec 2012

Monthly Rolling Totals - Dec 2012

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