Monthly Surveillance Report - Sep 2008

Wednesday 18th September 2019


Key notifiable disease trends

  • Brucellosis: Two cases of brucellosis were notified in September 2008. Both were subsequently de-notified as under further investigation they were found not be brucellosis cases.
  • Cholera: Under further investigation, the cholera case reported in the August 2008 Monthly Surveillance Report was found not be a case of cholera and has been de-notified.
  • Cryptosporidiosis: 208 cryptosporidiosis cases were notified in September 2008 compared to 122 cases notified in the same month of the previous year. For the 12 month period ending 30 September 2008 the national rate was 17.1 per 100 000 population compared to 23.1 for the same 12 month period last year. Waikato DHB reported the highest number of cases (38) in September 2008 followed by Canterbury DHB (37). Among the cases for whom this information was recorded, 87.0% (80/92) had contact with farm animals, 60.6% (40/66) had consumed untreated water, 25.4% had consumed food from a food premise, 20.9% (14/67) had faecal contact, 16.4% (11/67) had recreational water contact, 13.8% (9/65) had contact with another confirmed case, and 9.0% (8/89) had travelled overseas. 13 cases were hospitalised. There were two outbreaks reported in Auckland involving 10 cases.
  • Giardiasis: 152 giardiasis cases were notified in September 2008 compared to 88 cases notified at the same time last year. Auckland DHB reported the highest number of cases (32) followed by Counties Manukau DHB (24). Among the cases for whom this information was recorded, 64.7% (11/17) had consumed untreated water, 47.8% (11/23) had contact with farm animals. 40.9% (9/22) had consumed food from a food premise, 37.9% (11/29) had travelled overseas, 37.5% (9/24) had contact with another case, 28.6% (6/21) had faecal contact and 19.0% (4/21) had recreational water contact during the incubation period. One case was hospitalised. Three giardiasis outbreaks from Auckland were reported involving nine cases.
  • Hydatid disease: One confirmed case of hydatid disease was notified in September 2008. The case, a 66 year old male from Bay of Plenty DHB, was notified following an incidental finding of an old cyst in 2006.No risk factor information is currently recorded.
  • Legionellosis: Eight cases of legionellosis were notified in September 2008 compared to one case in the same month of the previous year. The cases were from Counties Manukau (4), Waitemata, Auckland, Whanganui and Waikato DHBs (1 case each). Three cases were hospitalised.The cases were in the following age groups: 30-39 years (2), 40-49 years (2), 60-69 years (2) and 70+ years (2). The species involved was identified for five of the cases: Legionella longbeachae serogroup 1 (3), L. pneumophila serogroup 1 (1) and L. bozemaniiserogroup 1 (1).
  • Leptospirosis: Sixteen cases of leptospirosis were notified in September 2008 compared to three notified case at the same month in the previous year. Ten cases were confirmed and five cases were hospitalised. Five of the cases had risk factor information with exposure to farm animals.
  • Meningococcal disease: Based on the earliest date available1, 13 cases of meningococcal disease were notified during September 2008, 10 (76.9%) of which were laboratory-confirmed. In comparison, 18 cases were notified the previous month, August 2008, and 10 cases were notified during the same month last year, September 2007. For the 12 month period ending 30 September 2008, West Coast DHB recorded the highest incidence rate of 6.2 per 100 000 population (2 cases), followed by Hawke’s Bay DHB (5.2 per 100 000, 8 cases), and Northland (5.2 per 100 000, 8 cases). The highest age-specific incidence rate was in infants aged less than one year (25.9 per 100 000 population, 16 cases), followed by those in the 1-4 years age group (13.0 per 100 000 population, 30 cases), and those in the 5-9 years age group (5.2 per 100 000 population, 15 cases).
  • Pertussis: 55 cases of pertussis were notified in September 2008 bringing the year to date total to 249. There were 11 (20%) laboratory-confirmed cases. The highest numbers of cases were reported from Capital and Coast (26) and Canterbury (12) DHBs. Capital and Coast DHB has notified an outbreak of pertussis (interim report). For the previous 12 months, Southland DHB had the highest incidence rate of 21.7 per 100 000 population (3 cases) compared to a national rate of 7.6 per 100 000 population. The current 12 month rate by age group was highest amongst infants aged less than one year (53.4 per 100 000 population, 33 cases), followed by children in the 1-4 years age group (9.5 per 100 000 population, 22 cases), and children in the 10-14 years age group (9.1 per 100 000 population, 28 cases).
  • Rickettsial disease: Two cases of rickettsial disease were notified in September 2008.Both cases were from Waitemata DHB. One case has been de-notified as not a case and the remaining case, a 41 year old male, is still under investigation. No risk factor information is currently recorded.


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 Surveillance Report - Sep 2008

Tables:

Monthly National Totals - Sep 2008

Monthly DHB Totals - Sep 2008

Monthly Rolling Totals - Sep 2008

 

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Monthly Surveillance Report - Sep 2008

Tables:

Monthly National Totals - Sep 2008

Monthly DHB Totals - Sep 2008

Monthly Rolling Totals - Sep 2008

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