Monthly Notifiable Disease Surveillance Report - Jan 2009

Monday 23rd September 2019


Key notifiable disease trends

  • Chemical poisoning from the environment: One case of chemical poisoning from the environment was notified in January 2009 and the case is still under investigation. This female case from Wairarapa DHB is still under investigation and aged 5-9 years.
  • Dengue fever: 31 cases of dengue fever were notified in January 2009 compared to 8 notified cases during the same month of the previous year. Six cases were hospitalised. Overseas travel was recorded for 25 of the cases. The countries visited during the incubation period were Fiji (10), Tonga (10) Samoa (4) and Vanuatu (1). For 5 cases the travel history of the case was recorded as unknown. The remaining case, still under investigation, had no overseas travel history. However, this case does not meet the case definition. It was identified through a screening test and had no clinically compatible illness. The test result is being reviewed.
  • Invasive pneumococcal disease: Invasive pneumococcal disease became notifiable on 17 October 2008, cases must be laboratory confirmed with S. pneumoniae detected from a normally sterile site. 47 cases of invasive pneumococcal disease were notified in January 2009. The cases were distributed by age as follows 4 (1-4 years), 1 (5-9 years), 5 (10-14 years), 1 (15-19 years), 1 (20-29 years), 3 (30-39 years), 2 (40-49 years), 6 (50-59 years), 7 (60-69 years) and 17 (70+ years). 39 of the cases were hospitalised, four of these cases died from invasive pneumococcal disease.
  • Measles: Five cases of measles were notified in January 2009 compared to zero notifications in the preceding month and same month of the previous year. The cases were reported from Otago (4) and Capital and Coast (1) DHBs. One case is still under investigation (aged less than one year) while the other four cases were laboratory confirmed but had not been immunised (1 (1-4 years), 1 (5-9 years), 1 (10-14 years) and 1 (15-19 years)). Otago DHB notified an outbreak of measles involving four cases.
  • Meningococcal disease: Based on the earliest date available1, 8 cases of meningococcal disease were notified during January 2009, 7 (87.5%) of which were laboratory-confirmed. In comparison, 8 cases were notified the previous month, December 2008, and 10 cases were notified during the same month last year, January 2008. For the 12 month period ending 31 January 2009, Whanganui DHB recorded the highest incidence rate of 7.9 per 100 000 population (5 cases), followed by Hawke’s Bay DHB (5.9 per 100 000, 9 cases) and Northland (5.8 per 100 000, 9 cases). The highest age-specific incidence rate was in infants aged less than one year (32.8 per 100 000 population, 21 cases), followed by those in the 1-4 years age group (13.6 per 100 000 population, 32 cases), and those in the 5-9 years age group (4.2 per 100 000 population, 12 cases).

  • Pertussis: 81 cases of pertussis were notified in January 2009 (Figure 2). There were 19 (23%) laboratory-confirmed cases. The highest numbers of cases were reported from Canterbury (18), Nelson Marlborough (12) and Waikato (12) DHBs. For the 12 month period ending 31 January 2009, Nelson Marlborough DHB had the highest incidence rate of 33.2 per 100 000 population (45 cases) compared to a national rate of 11.8 per 100 000 population. The current 12 month rate by age group was highest amongst infants aged less than one year (79.6 per 100 000 population, 51 cases), followed by children the 10-14 years age group (14.6 per 100 000 population, 44 cases).

  • Rheumatic fever: 12 cases of rheumatic fever (all initial attacks) were notified in January 2009 compared to 9 notifications in the preceding month and 3 notifications in the same month of the previous year. The cases were reported from Waikato (3), Auckland (2), Northland (1), Waitemata (1), Counties Manukau (1), Bay of Plenty (1), Taranaki (1), Hutt Valley (1), and Capital and Coast (1) DHBs.
  • Salmonellosis: 147 cases of salmonellosis were notified in January 2009 compared to 130 notified cases in the previous month (Figure 1). The highest numbers of cases were reported from Counties Manukau (24), Canterbury (14) and Otago (14) DHBs. 12 cases were hospitalised. The serotype involved was identified for 96 of the cases. The dominant serotypes were: Salmonella Typhimurium phage type 1 (15), S. Typhimurium phage type 160 (14) and S. Typhimurium phage type 42 (9).

  • Typhoid fever: Six cases of typhoid fever were notified in January 2009 compared to one notified case in the same month of the previous year. The cases were from Capital and Coast (3), Waitemata (1), Auckland (1), and Counties Manukau (1) DHBs. Five cases were hospitalised. The species involved was identified for three of the six cases as: Salmonella Typhi phage type E1a (2) and S. Typhi W form (1). Information on overseas travel was recorded for two cases, who had been to India.

  • Toxic shellfish poisoning: One probable case of toxic shellfish poisoning was notified in January 2009. The case was in the 30-39 years age group from Waitemata DHB. It was reported that the case ate shellfish from Paihia but the type of toxic shellfish poisoning was unspecified.


1
The ‘earliest’ date refers to the earliest recorded date for the case (onset or hospitalisation date rather than report date, if available). ‘Earliest’ date, as opposed to ‘report date’ alone, is used throughout the analysis of meningococcal disease notification data.

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 - Jan 2009

Tables:

Monthly National Totals - Jan 2009

Monthly DHB Totals - Jan 2009

Monthly Rolling Totals - Jan 2009

 

DOWNLOADS

Monthly Notifiable Disease Surveillance Report - Jan 2009

Tables:

Monthly National Totals - Jan 2009

Monthly DHB Totals - Jan 2009

Monthly Rolling Totals - Jan 2009

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