Monthly Notifiable Disease Surveillance Report - Nov 2009

Thursday 19th September 2019


Key notifiable disease trends

  • Arboviral disease:  One case of Barmah Forest virus infection was notified.  The case was a 40-49 male from Bay of Plenty DHB and had been in Australia during the incubation period.  A 40-49 year old female from Waitemata DHB was notified with Chikungunya fever in November 2009.  The case was laboratory-confirmed and had travelled overseas to Thailand during the incubation period.  A 30-39 year old female from Waitemata DHB was notified with Ross River virus infection.  The laboratory-confirmed case was in Fiji during the incubation period.  
  • Campylobacteriosis:  973 campylobacteriosis cases were notified in November 2009 compared to 786 cases notified in the same month of the previous year (Figure 1).  There were 795 (81.7%) laboratory-confirmed cases.  For the 12 month period ending 30 November 2009, the highest incidence rates were reported from Capital and Coast (250.3 per 100 000 population, 712 cases) and Hutt Valley (250.2 per 100 000 population, 355 cases) DHBs compared to a national rate of 169.0 per 100 000 population.  One interim campylobacter outbreak from Waikato DHB was notified including three cases.
  • Cholera:  The cholera case reported in November 2009 was found to be infected with a non O1 non O139 serogroup strain of Vibrio cholerae.  Only cholera due to O1 or O139 serogroup strains are notifiable and the case has since been de-notified.
  • Measles: 15 cases of measles (2 confirmed, 1 probable, and 12 under investigation) were notified in November 2009 compared to five notifications in the preceding month and three in the same month of the previous year.  There were two laboratory-confirmed cases.  The highest number of cases was reported by Auckland, Counties Manukau, Lakes, Hawke’s Bay and West Coast (2 cases each) DHBs.  No cases were hospitalised.  For more information on the measles situation in New Zealand, including the age, ethnicity, and vaccination status of cases, please refer to the Measles Report available here.
  • Meningococcal disease:  Based on the earliest date available1, five cases (3 laboratory-confirmed) of meningococcal disease were notified during November 2009.  In comparison, 11 cases were notified in the previous month, October 2009, and 15 cases were notified during the same month last year, November 2008.  For the 12 month period ending 30 November 2009, Tairawhiti DHB recorded the highest incidence rate (15.3 per 100 000 population, 7 cases), followed by MidCentral DHB (6.1 per 100 000 population, 10 cases) and Hawke’s Bay DHB (5.2 per 100 000 population, 8 cases).  The age-specific incidence rate was highest in the <1 years age group (45.3 per 100 000 population, 29 cases), followed by those in the 1-4 years age group (14.0 per 100 000 population, 33 cases).
  • Non-seasonal influenza: In New Zealand, non seasonal influenza became notifiable on 29 April 2009.  Eight cases of non-seasonal influenza A (H1N1) were notified in November 2009 (seven confirmed cases) compared with 22 cases in the preceding month.  One case was hospitalised.  The highest number of cases was reported by Bay of Plenty and Capital and Coast (2 cases each) DHBs.  For the latest information on the non seasonal influenza A (H1N1) situation in New Zealand see http://www.moh.govt.nz/influenza-a-h1n1.
  • Pertussis: 144 cases of pertussis were notified in November 2009, compared to 119 notifications in the preceding month and 55 notifications in the same month of the previous year (Figure 2).  There were 44 (30.6%) laboratory-confirmed cases.  The highest numbers of cases were reported by Waikato DHB (34), followed by Waitemata (18) and Canterbury (17) DHBs.  For the 12 month period ending 30 November 2009, the highest incidence rates were reported from West Coast (89.6 per 100 000 population, 29 cases) and Nelson Marlborough (67.1 per 100 000 population, 91 cases) DHBs compared to a national rate of 31.0 per 100 000 population.  The current 12-month rate by age group was highest among infants aged less than one year (177.9 per 100 000 population, 114 cases), followed by children in the 1-4 years age group (58.5 per 100 000 population, 138 cases). Further analysis of pertussis notifications is available in the Pertussis Report which is updated fortnightly and available here.
  • Taeniasis:  One laboratory-confirmed case of taeniasis was notified in November 2009.  The case was male in the 30-39 years age group from South Canterbury DHB.  The case is from Romania and is considered to have acquired the infection there.  Laboratory tests confirmed taenia saginata as the tapeworm.
  • VTEC/STEC infection: 12 cases of VTEC/STEC infection were notified in November 2009, compared to 17 in the preceding month and seven notifications in the same month of the previous year.  The highest numbers of cases were reported from Counties Manukau (3), Waitemata, Auckland and Taranaki (2 cases each) DHBs.  The cases were aged between less than 1 year and 50-59 years, with the highest number of cases in the 30-39 years age group (3).  Escherichia coli O157:H7 was isolated for four cases, with one case each of E. coli O103:H2 and E. coli O26:H11.  Risk factors recorded include: 100.0% had contact with animals (3/3), 66.7% (2/3) had attended school, 33.3% (1/3) had contact with another person with similar symptoms, 33.3% (1/3) had contact with children in nappies, 33.3% (1/3) had recreational contact with water, and 33.3% (1/3) had contact with manure.

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 - Nov 2009

Tables:

Monthly National Totals - Nov 2009

Monthly DHB Totals - Nov 2009

Monthly Rolling Totals - Nov 2009

 

DOWNLOADS

Monthly Notifiable Disease Surveillance Report - Nov 2009

Tables:

Monthly National Totals - Nov 2009

Monthly DHB Totals - Nov 2009

Monthly Rolling Totals - Nov 2009

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