Monthly Notifiable Disease Surveillance Report - Jul 2009

Monday 23rd September 2019


Key notifiable disease trends

  • Cryptosporidiosis: 55 cryptosporidiosis cases (41 laboratory-confirmed cases) were notified in July 2009 compared 16 notified cases during the same month of the previous year. For the 12 month period ending 31 July 2009 the national rate was 21.7 per 100 000 population compared to 15.3 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 (17 cases). One case was hospitalised. Among the cases where risk factor information was recorded, 53.8% (7/13) had faecal contact, 50.0% (9/18) had recreational water contact, 43.8% (7/16) attended school, 15.4% (2/13) had contact with farm animals and 14.3% (2/14) had consumed food from a food premise. One case had been to Fiji during the incubation period.
  • Hepatitis B: 14 cases of Hepatitis B (6 laboratory-confirmed cases) were notified in July 2009 compared to seven notifications in the preceding month and four notifications in same month of the previous year (Figure 1).The cases were aged between 28 and 71 years and had the following prioritised ethnicities: European (7 cases), Asian (3 cases), Maori (2 cases), Pacific Peoples (1 case), Unknown (1 case).The cases were reported from Capital and Coast (3), Auckland (2), Counties Manukau (2), Bay of Plenty (2), West Coast (2), Waitemata (1), Wairarapa (1) and Nelson Marlborough (1) DHBs.Three cases were hospitalised. Sexual contact with a confirmed case (or carrier) was reported for three cases (including one case with both household and sexual contact with a confirmed case (or carrier)). Household contact with a confirmed case (or carrier) was reported for one additional case who was also overseas during their incubation period.
  • Hydatid disease: One laboratory-confirmed case of hydatid disease was notified in July 2009.The notification relates to a historical infection in a symptomatic 70+ year old male from Counties Manukau DHB. He had occupational exposure as digger contractor working in rural areas.
  • Measles: 93 cases of measles (64 confirmed, 13 probable, and 16 under investigation) were notified in July 2009 compared to five notifications in the preceding month and zero notifications in the same month of the previous year (Figure 2). 45 cases were laboratory confirmed. The 93 cases were reported from Canterbury (80), Waitemata (5), Auckland (2), Counties Manukau (2), Otago (2), Northland (1) and South Canterbury (1) DHBs. Eleven cases were hospitalised. One outbreak (still ongoing) involving over 70 cases (as at 6 August 2009) was reported from Canterbury DHB. For more information on the measles situation in New Zealand, including the age, ethnicity, and vaccination status of cases, please refer to the Measles Weekly Report available from http://www.surv.esr.cri.nz/surveillance/WeeklyMeaslesRpt.php.
  • Meningococcal disease: Based on the earliest date available1, 24 cases (21 laboratory-confirmed) of meningococcal disease were notified during July 2009. In comparison, 12 cases were notified the previous month, July 2009, and 16 cases were notified during the same month last year, July 2008. For the 12 month period ending 31 July 2009, Tairawhiti DHB recorded the highest incidence rate (8.7 per 100 000 population, 4 cases), followed by Hawke's Bay DHB (7.2 per 100 000, 11 cases) and Northland DHB (6.5 per 100 000, 10 cases). The highest age-specific incidence rate was in infants aged less than one year (35.9 per 100 000 population, 23 cases), followed by those in the 1-4 years age group (13.1 per 100 000, 31 cases) and those in the 15-19 years age group (5.6 per 100 000, 18 cases).
  • Non-seasonal influenza: In New Zealand, non seasonal influenza A (H1N1) became notifiable on 29 April 2009 and 2097 cases of influenza A (H1N1) were notified in July 2009 (2062 confirmed, 29 probable and 6 under investigation).The preceding month reported 1175 cases. There were 527 hospitalised cases. The highest number of cases was recorded from Canterbury (367 cases) followed by Capital and Coast (219 cases) and Auckland (215 cases) 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: 110 cases of pertussis were notified in July 2009, compared to 115 notifications in the preceding month and 24 notifications in same month of the previous year. There were 22 (20.0%) laboratory-confirmed cases. The highest numbers of cases were reported from Waikato (24 cases), Canterbury (21 cases) and Capital and Coast (14 cases) DHBs. For the 12 month period ending 31 July 2009, the highest incidence rates were reported from West Coast (77.2 per 100 000 population, 25 cases) and Nelson Marlborough (73.0 per 100 000, 99 cases) DHBs compared to a national rate of 23.9 per 100 000 population. The current 12 month rate by age group was highest amongst infants aged less than one year (138.9 per 100 000 population, 89 cases), followed by children in the 1-4 years age group (41.1 per 100 000, 97 cases).
  • Taeniasis: One laboratory-confirmed case was notified with taeniasis in July 2009. The case was male in the 20-29 years age group from Auckland DHB. The case had been to India and then Thailand during the incubation period.

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 - Jul 2009

Tables:

Monthly National Totals - Jul 2009

Monthly DHB Totals - Jul 2009

Monthly Rolling Totals - Jul 2009

 

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Monthly Notifiable Disease Surveillance Report - Jul 2009

Tables:

Monthly National Totals - Jul 2009

Monthly DHB Totals - Jul 2009

Monthly Rolling Totals - Jul 2009

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