Monthly Surveillance Report - Sep 2006

Monday 23rd September 2019


Key Notifiable Disease Trends

  • Influenza: during September 2006 (weeks 35 – 39), 469 consultations for influenza-like illness were reported from 78 general practices (on average) in 22 out of 24 health districts.  The average weekly consultation rate for September was 28.9 per 100 000 patient population, compared to a rate of 14.5 per 100 000 patient population during the same month last year (Figure 1). Eastern Bay of Plenty had the highest consultation rate (146.3 per 100 000), followed by South Canterbury (123.9 per 100 000). A total of 99 swabs were received for testing during September. Of these, 14 influenza viruses were isolated, eight as A/New Caledonia/20/1999 (H1N1) – like, four as influenza A (yet to be sub-typed), and two as A/New York/55/2004 (H3N2) – like. In addition, 24 influenza viruses were reported from the laboratory-based (non-sentinel) surveillance in September, 19 as influenza A (yet to be sub-typed), four as A/New Caledonia/20/1999 (H1N1) – like, and one as influenza B (not typed).
  • Malaria: three cases of malaria were notified in September 2006 compared to one notified case in the same month of the previous year. All cases were infected with Plasmodium vivax and were overseas during the incubation period. The countries visited were Solomon Islands (2) and India (1).
  • Meningococcal disease: based on the earliest date available , 12 cases of meningococcal disease were notified during September 2006, of which 10 (83.3%) were laboratory-confirmed, and none were fatal.  In comparison, 17 cases were notified the previous month, August 2006, and 14 cases were notified during the same month last year, September 2005. For the 12 month period ending 30 September 2006, Wairarapa DHB recorded the highest incidence rate of 10.5 per 100 000 population (4 cases). The highest age-specific incidence rate was in infants aged less than one year (56.7 per 100 000 population, 31 cases), followed by those in the 1-4 years age group (12.0 per 100 000 population, 26 cases), and those in the 15-19 years age group (11.7 per 100 000 population, 31 cases).
  • Pertussis: 100 pertussis cases were notified in September 2006, of whom 12 (12.0%) were laboratory-confirmed. The number of pertussis notifications per month has decreased from the peak in November 2004 when 613 cases were notified. Of the 100 cases notified in September 2006, three were reported as being hospitalised. Waikato DHB had the highest number of cases (39). For the 12 month period ending 30 September 2006, Canterbury DHB had the highest incidence rate of 129.7 per 100 000 population (554 cases), compared to the national rate of 42.8 per 100 000 population. Over this period the incidence rate by age group was highest amongst infants aged less than one year (111.6 per 100 000 population). This was followed by children in the 10-14 years age group (61.6 per 100 000 population) and the 60-69 years age group (53.5 per 100 000 population).
  • Tuberculosis: 58 cases were notified in September 2006 compared to 22 cases notified in the same month of the previous year (Figure 2). The highest number of cases were from MidCentral (12), Northland (11), and Counties Manukau (10) DHBs. The highest number of cases was in the 10-14 years age group (11 cases).  Eleven of the 12 MidCentral DHB cases were part of a high school outbreak.
  • Typhoid fever: four cases were notified in September 2006. The cases were from Waitemata (2 cases), Counties Manukau (1), and Bay of Plenty (1) DHBs. The species involved were: Salmonella Typhi phage type E1a (2) and S. Typhi phage type E7 variant (2). Only one of the cases had been overseas (India) during the incubation period. The other three cases had no overseas travel.

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Report:

Monthly Surveillance Report - Sep 2006

Tables:

Monthly National Totals - Sep 2006

Monthly DHB Totals - Sep 2006

Monthly Rolling Totals - Sep 2006

 

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Monthly Surveillance Report - Sep 2006

Tables:

Monthly National Totals - Sep 2006

Monthly DHB Totals - Sep 2006

Monthly Rolling Totals - Sep 2006

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