Monthly Notifiable Disease Surveillance Report - May 2009

Friday 20th September 2019


Key notifiable disease trends

  • Barmah Forest virus infection: One confirmed case of Barmah Forest virus infection was notified from Otago DHB in May 2009. The infection was acquired in Northern Territory, Australia.
  • Cryptosporidiosis: 45 cryptosporidiosis cases were notified in May 2009 compared to 31 cases notified in the same month of the previous year. For the 12 month period ending 31 May 2009 the national rate was 19.7 per 100 000 population compared to 16.5 for the same 12 month period last year. The cases had varied ages, ranging from less than 1 year to 50-59 years, with the highest number of cases in the 1-4 years age group (17 cases). One case was hospitalised. Among the cases where risk factor information was recorded, 57.1% (4/7) had faecal contact, 54.5% (6/11) had contact with farm animals, 50.0% (4/8) had consumed food from a food premise and 11.1% (1/9) had recreational water contact. Two cases had travelled overseas.
  • Dengue fever: 14 cases of dengue fever were notified in May 2009 compared to two notified cases during the same month of the previous year. For the 12 month period ending 31 May 2009 the national rate was 3.8 per 100 000 population. The highest number of cases was in the 40-49 and 50-59 years age groups (5 cases each). Two cases were hospitalised. Overseas travel was recorded for 11 of the cases and the travel history of three cases was recorded as unknown. The countries visited during the incubation period were the Cook Islands (10) and the Philippines (1).
  • Lead absorption: 41 cases of lead absorption were notified in May 2009 compared to 15 notified cases in the same month of the previous year (Figure 1). The highest number of cases was reported from Auckland DHB(10 cases). The cases were aged between 1-4 years and 70+ years, with the highest number of cases in the 40-49 years age group (12 cases), followed by 30-39 years age group (9 cases). Sixteen cases were recorded as currently working or having worked in high risk occupations. The recorded high risk occupations were: painter/decorator (4), scrap metal dealer (1) and 11 unknown.From 18 June 2007 the non-occupational notifiable blood lead level reduced from 0.72 µmol/L to 0.48 µmol/L.
  • Measles: Seven cases of measles were notified in May 2009 compared to nine notifications in the preceding month and two notifications in same month of the previous year. The cases were reported from Counties Manukau (3 cases), Auckland (2), Nelson Marlborough (1) and Otago (1) DHBs. The one laboratory confirmed case (aged 1-4 years) was recorded as having been immunised.
  • Meningococcal disease: Based on the earliest date available1, five cases (3 laboratory-confirmed) of meningococcal disease were notified during May 2009. In comparison, seven cases were notified the previous month, April 2009, and five cases were notified during the same month last year, May 2008. For the 12 month period ending 30 April 2009, Whanganui DHB recorded the highest incidence rate of (6.3 per 100 000 population, 4 cases), followed by Hawke's Bay DHB (5.9 per 100 000, 9 cases) and Wairarapa DHB (5.0 per 100 000, 2 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 (14.0 per 100 000, 33 cases), and those in the 15-19 years age group (5.0 per 100 000, 16 cases).
  • Non-seasonal Influenza: In New Zealand, non seasonal influenza A (H1N1) became notifiable on 29 April 2009.Twenty-seven cases of influenza A (H1N1) were notified in May 2009 (3 confirmed, 3 probable and 21 suspect).None of these cases were reported to have been hospitalised or died.The cases had varied ages, ranging from 1-4 years to 60-69 years, with the highest number of cases in the 50-59 years age group (7 cases). The cases were reported from Waitemata (8 cases), Counties Manukau (6), Hawke's Bay (6), Waikato (3), Auckland (2), South Canterbury (1) and Taranaki (1) DHBs. For the latest information on the influenza A (H1N1) situation in New Zealand see http://www.moh.govt.nz/influenza-a-h1n1.
  • Pertussis: 109 cases of pertussis were notified in May 2009, compared to 98 notifications in the preceding month and 26 notifications in same month of the previous year (Figure 2). There were 23 (21.1%) laboratory-confirmed cases. The highest numbers of cases were reported from Canterbury (27 cases), Waitemata (15) and Waikato (11) DHBs. For the 12 month period ending 31 May2009, the highest incidence rates were reported from West Coast (74.1 per 100 000 population, 24 cases) and Nelson Marlborough (68.5 per 100 000, 93 cases) DHBs compared to a national rate of 19.9 per 100 000 population. The current 12 month rate by age group was highest amongst infants aged less than one year (117.1 per 100 000 population, 75 cases), followed by children in the 1-4 years age group (32.6 per 100 000, 77 cases).

1The ‘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 - May 2009

Tables:

Monthly National Totals - May 2009

Monthly DHB Totals - May 2009

Monthly Rolling Totals - May 2009

 

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Monthly Notifiable Disease Surveillance Report - May 2009

Tables:

Monthly National Totals - May 2009

Monthly DHB Totals - May 2009

Monthly Rolling Totals - May 2009

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