Monthly Notifiable Disease Surveillance Report - Mar 2009

Monday 23rd September 2019


Key notifiable disease trends

  • Cryptosporidiosis: 48 cryptosporidiosis cases were notified in March 2009 compared to 24 cases notified in the same month of the previous year. For the 12 month period ending 31 March 2009 the national rate was 19.0 per 100 000 population compared to 18.8 for the same 12 month period last year. The cases had varied ages, ranging from less than 1 year to 70+ years, with the highest number of cases in the 1-4 years age group (14 cases) followed by 30-39 years age group (9 cases). One case was hospitalised. Among the cases where risk factor information was recorded, 50.0% (5/10) had faecal contact, 45.5% (5/11) had recreational water contact,44.4% (4/9) had consumed food from a food premise and 20.0% (2/10) had contact with farm animals. Two cases had travelled overseas.
  • Dengue Fever: 18 cases of dengue fever were notified in March 2009 compared to 7 notified cases during the same month of the previous year. For the 12 month period ending 31 March 2009 the national rate was 3.5 per 100 000 population. The highest number of cases was in the 30-39 years age group (5 cases). Four cases were hospitalised. Overseas travel was recorded for 14 of the cases and the travel history of 4 cases were recorded as unknown. The countries or regions visited during the incubation period were Tonga (7), Vanuatu (2), Australia (1), Cook Islands (1), Papua New Guinea (1), Samoa (1), and South Asia (1).
  • Hazardous substances injury: Two cases of laboratory-confirmed hazardous substances injuries were notified in March 2009. Both cases were from Otago DHB, a female in the 30-39 years age group and a male in the 40-49 year age group. Both cases were hospitalised and involved in an outbreak. These cases are still under investigation.
  • Meningococcal disease: Based on the earliest date available1, 4 cases of meningococcal disease were notified during March 2009, 3 (75.0%) of which were laboratory-confirmed. In comparison, 9 cases were notified the previous month, February 2009, and 7 cases were notified during the same month last year, March 2008. For the 12 month period ending 31 March 2009, Hawke’s Bay DHB recorded the highest incidence rate of 6.5 per 100 000 population (10 cases), followed by Whanganui DHB (6.3 per 100 000, 4 cases) and Southland DHB (5.4 per 100 000, 6 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, 32 cases), and those in the 15-19 years age group (5.0 per 100 000, 16 cases).
  • Pertussis: 121 cases of pertussis were notified in March 2009, compared to 140 notifications in the preceding month and 27 notifications in same month of the previous year (Figure 1). There were 36 (29.8%) laboratory-confirmed cases. The highest numbers of cases were reported from Canterbury (38), Nelson Marlborough (20) and Waikato (11) DHBs. For the 12 month period ending 31 March 2009, the highest incidence rates were reported from West Coast (67.9 per 100 000 population, 5 cases) and Nelson Marlborough (60.4 per 100 000, 20 cases) DHBs compared to a national rate of 16.2 per 100 000 population. The current 12 month rate by age group was highest amongst infants aged less than one year (104.6 per 100 000 population, 67 cases), followed by children in the 1-4 years age group (26.3 per 100 000, 62 cases).
  • Ross River Virus Infection: One case of Ross River virus infection, still under investigation, was laboratory notified in March 2009. The case was a female in the 60-69 years age group of European ethnicity. The case had been to Australia during the incubation period for this disease.
  • Taeniasis: One laboratory-confirmed male case was notified with taeniasis in March 2009. The case was in the 30-39 years age group from Auckland DHB. The case is from Ethiopia and is considered to have acquired the infection there.
  • VTEC/STEC:33 cases of VTEC/STEC infections were notified in March 2009.The highest numbers of cases were reported from Bay of Plenty (6) and Auckland (5) DHBs. The cases were aged between less than 1 year and 70+ years, with the highest number of cases in the 1-4 years age group (8 cases). VTEC O157 was isolated for 17 of the cases.Risk factors recorded include:contact with animals (11), attended school (7), attended a social function (4), recreational water contact (4), consumption of water fromnon habitual water supply (3), contact with another person with similar symptoms (2) and contact with children in nappies (2).


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 - Mar 2009

Tables:

Monthly National Totals - Mar 2009

Monthly Rolling Totals - Mar 2009

Monthly DHB Totals - Marh 2009

 

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Monthly Notifiable Disease Surveillance Report - Mar 2009

Tables:

Monthly National Totals - Mar 2009

Monthly Rolling Totals - Mar 2009

Monthly DHB Totals - Marh 2009

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