Monthly Notifiable Disease Surveillance Report - Oct 2009

Monday 23rd September 2019


Key notifiable disease trends

  • Measles: 16 cases of measles (3 confirmed, 4 probable, and 9 under investigation) were notified in October 2009 compared to 42 notifications in the preceding month and zero in the same month of the previous year (Figure 1). There were two laboratory confirmed cases. The highest number of cases was reported by Auckland DHB (5 cases, 1 probable and 4 under investigation). Three 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, 11 cases (all laboratory-confirmed) of meningococcal disease were notified during October 2009. In comparison, 13 cases were notified the previous month, September 2009, and eight cases were notified during the same month last year, October 2008. For the 12 month period ending 31 October 2009, Tairawhiti DHB recorded the highest incidence rate (10.9 per 100 000 population, 5 cases), followed by Wairarapa DHB (7.5 per 100 000 population, 3 cases) and Hawke’s Bay DHB (6.5 per 100 000 population, 10 cases). The age-specific incidence rate was highest in infants aged less than one year (46.8 per 100 000 population, 30 cases), followed by those in the 1-4 years age group (14.8 per 100 000 population, 35 cases) and those in the 15-19 years age group (6.8 per 100 000 population, 22 cases).
  • Mumps: 12 cases of mumps (5 confirmed, 2 probable, and 5 under investigation) were notified in October 2009 compared to 7 in the preceding month and zero notifications in the same month of the previous year. The cases were reported from Waitemata (3), Auckland (2), Counties Manukau (2), Lakes (1), Bay of Plenty (1), Hutt Valley (1), Nelson Marlborough (1), and Canterbury (1) DHBs. The highest number of cases was recorded by those in the 1-4 years age group (5). Of the five confirmed cases, two had received one dose of vaccine (two children aged 10-14 years), one was reported to be immunised but dose information was not available (aged 10-14 years), and the immunisation status of the two remaining adult cases is unknown. One case was hospitalised.
  • Non-seasonal influenza: In New Zealand, non-seasonal influenza became notifiable on 29 April 2009.Twenty-two cases of non-seasonal influenza A (H1N1) were notified in October 2009 (all confirmed cases) compared with 22 cases in the preceding month. There were five hospitalised cases. The highest number of cases was reported by Counties Manukau DHB (7), followed by Canterbury DHB (6). 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: 120 cases of pertussis were notified in October 2009, compared to 129 notifications in the preceding month and 61 notifications in the same month of the previous year.There were 35 (29.2%) laboratory-confirmed cases.The highest numbers of cases were reported by Waikato DHB (31), followed by Canterbury (24) and Capital and Coast (11) DHBs. For the 12 month period ending 31 October 2009, the highest incidence rates were reported from West Coast (86.5 per 100 000 population, 28 cases) and Nelson Marlborough (67.8 per 100 000, 92 cases) DHBs compared to a national rate of 29.1 per 100 000 population. The current 12-month rate by age group was highest amongst infants aged less than one year (170.1 per 100 000 population, 109 cases), followed by children in the 1-4 years age group (55.5 per 100 000 population, 131 cases).
  • Rickettsial Disease (including Q Fever):One case of murine typhus and two cases of Q Fever were notified in October 2009. The lab-confirmed murine typhus case was a 15-19 year old male from Waikato DHB and was hospitalised. The case had not travelled overseas during the disease incubation period and the probable source of the disease is thought to be contact with rats on a farm. The two cases of Q Fever were both from Bay of Plenty DHB. One case is likely to have been exposed in the 1980s in Queensland but does not have a chronic ongoing infection and will be made ‘not a case’. The second case is still under investigation. Repeat serology is awaited as the diagnosis is uncertain. The case was travelling overseas prior to the onset of their symptoms.
  • Shigellosis: 12 cases of shigellosis were notified in October 2009 compared to five notified cases in the same month of the previous year. The cases were reported from Auckland (4), Waitemata (2), Northland, Waikato, Bay of Plenty, Hutt Valley, West Coast and South Canterbury DHBs (1 case each). The serotype involved was identified for seven of the cases; Shigella sonnei biotype g (5), S. flexneri 2a (1) and S. sonnei biotype a (1). Three cases reported overseas travel during the incubation period; India (2) and Peoples Republic of China (1).
  • VTEC/STEC infection:17 cases of VTEC/STEC infection were notified in October 2009, compared to 15 in the preceding month and four notifications in the same month of the previous year (Figure 2). The highest numbers of cases were reported from Waikato (4), Waitemata (2) and Canterbury (2) DHBs. The cases were aged between 1-4 years and 60-69 years, with the highest number of cases in the 1-4 years age group (8). Escherichia coli O157:H7 was isolated for all of the cases. Risk factors recorded include: 80% had contact with farm animals (4/5), 33.3% had attended school (3/9), 25.0% had contact with another person with similar symptoms (2/8), 11.1% had recreational water contact (1/9), and 14.3% had consumed water from a non habitual water supply (1/7).


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.

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Report:

Monthly Notifiable Disease Surveillance Report - Oct 2009

Tables:

Monthly National Totals - Oct 2009

Monthly DHB Totals - Oct 2009

Monthly Rolling Totals - Oct 2009

 

DOWNLOADS

Monthly Notifiable Disease Surveillance Report - Oct 2009

Tables:

Monthly National Totals - Oct 2009

Monthly DHB Totals - Oct 2009

Monthly Rolling Totals - Oct 2009

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