Monthly Surveillance Report - Aug 2005

Monday 23rd September 2019


Key Notifiable Disease Trends

  • Campylobacter: 1260 campylobacter cases were notified in August 2005 compared to 909 cases notified in the same month last year. Canterbury DHB recorded the highest number of cases (177). Among the cases for whom this information was recorded 65.5% (112/171) had consumed food from a food premise, 14.9% (29/195) had faecal contact, 13.6% (24/177) had consumed untreated water, 12.5% (23/184) had recreational water contact, and 6.0% (11/182) had contact with sick animals, during the incubation period. South Canterbury DHB recorded the highest current incidence rate of 689.6 per 100 000 population compared to the national rate of 329.3 per 100 000 population. Hospitalisation data was recorded for 577 cases of whom 45 (7.8%) were hospitalised. One final outbreak was reported from West Coast involving two cases. One interim outbreak was reported from the Wellington region involving five cases thus far.
  • Cryptosporidiosis: 71 cryptosporidiosis cases were notified in August 2005 compared to 50 cases notified at the same time last year. Waikato DHBs reported the highest number of cases (30). For the previous 12 months, Lakes, Waikato and South Canterbury DHB had the highest current incidence rates of 64.6, 51.9, 49.3 per 100 000 population (62, 165 and 26 cases), respectively. Among the cases for whom this information was recorded, 71.4% (5/7) had consumed food from a food premise, 50.0% (7/14) had consumed untreated water, 45.5% (5/11) had recreational water contact, 33.3% (7/21) had faecal contact, and 15.0% (3/20) had contact with sick animals during the incubation period. Two cases were hospitalised.
  • Dengue: one case of dengue fever was reported in August, bringing the year to date total to 10.  The case was confirmed by positive IgM antibody and had travelled to Singapore.  The case was not hospitalised and had never taken any precautions against biting insects while overseas. 
  • Giardiasis: 123 giardiasis cases were notified in August 2005 compared to 106 cases notified at the same time last year. Capital and Coast DHB reported the highest number of cases (15). Among the cases for whom this information was recorded, 36.0% (9/25) had consumed untreated water, 35.3% (6/17) had consumed food from a food premise, 34.4% (11/32) had faecal contact, 32.1% (9/28) had recreational water contact, and 14.8% (4/27) had contact with another case during the incubation period. Two cases were hospitalised. One final giardiasis outbreak from Auckland was reported involving two cases with overseas transmission of the disease. Three interim outbreak reports were received, two from the Auckland region and one from Hawke’s Bay, involving four cases thus far.
  • Influenza: during August (weeks 31 – 34), 383 consultations for influenza-like illness were reported from 78 general practices (on average) in 21 out of 24 health districts.  The average weekly consultation rate for August was 32.4 per 100 000 patient population, compared to a rate of 32.1 per 100 000 patient population during the same month last year (Figure 1).  Otago had the highest consultation rate (188.8 per 100 000), followed by Hutt (90.9 per 100 000). A total of 100 swabs were received for testing during August. Of these, 14 influenza viruses were identified, seven as A/California/7/2004-like, five as B/Hong Kong/330/2001-like, one as influenza A (yet to be sub-typed) and one as B/Sichuan/379/1999-like. In addition, 44 influenza viruses were reported from the laboratory-based (non-sentinel) surveillance in August. Of these, 14 were identified as influenza A (yet to be sub-typed), 13 as A/California/7/2004-like, 11 as influenza B (yet to be antigenically typed), three as B/Hong Kong/330/2001-like, two as A/New Caledonia/20/1999-like, and one as B/Shanghai/361/2002-like.
  • Legionellosis: 11 legionellosis cases were notified in August, compared to five cases in August 2004. Seven cases were reported from Canterbury, one each from Hawke’s Bay, Hutt, Capital and Coast, and Otago DHBs. The cases range in age from 23 to 87 years. The species involved was identified for 10 of the 11 cases as Legionella pneumophila serogroup 1 (9 cases) and L. longbeachae serogroup 1 (1 case). One of the confirmed cases had been exposed to potting mix. Nine cases were hospitalised and one death was reported. Investigation of the cases from Canterbury continues.
  • Meningococcal disease: based on earliest date available , 14 cases of meningococcal disease were notified during August 2005, of which 12 (85.7%) were laboratory-confirmed. In comparison, 37 cases were notified the previous month, and 39 cases were notified during August 2004. For the previous 12 months, Tairawhiti DHB recorded the highest current rate of 18.2 per 100 000 population (8 cases). Counties Manukau DHB recorded the highest number of cases (37) with a current rate of 9.9 per 100 000 population. The rate of disease was highest amongst infants aged less than one year (54.9 per 100 000 population, 30 cases), followed by those in the 1-4 years age group (34.2 per 100 000 population, 74 cases).
  • Pertussis: 208 pertussis cases were notified in August 2005, of whom 41 (19.7%) were laboratory confirmed. Pertussis numbers have decreased from the peak in November 2004 with 613 cases (Figure 2). Canterbury DHB had the highest number of cases (74). For the previous 12 months, Southland DHB had the highest incidence rate of 683.2 per 100 000 population (706 cases), compared to a national rate of 109.9 per 100 000 population. Hospitalisation data was recorded for 146 cases of whom 7 (4.8%) were hospitalised. The rate by age group for the previous 12 months was highest amongst infants aged less than one year (322.0 per 100 000 population). This was followed by children in the 5-9 years age group (214.9) and the 10-14 years age group (212.6).
  • Typhoid fever: two cases of typhoid fever were notified in August 2005 bringing the year to date total to 25. The first case was a migrant with phage type E1a and the second case was phage type untypable who had been to Thailand and Cambodia. One case was hospitalised.

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Report:

Monthly Surveillance Report - Aug 2005

Tables:

Monthly National Totals - Aug 2005

Monthly DHB Totals - Aug 2005

Monthly Rolling Totals - Aug 2005

 

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Monthly Surveillance Report - Aug 2005

Tables:

Monthly National Totals - Aug 2005

Monthly DHB Totals - Aug 2005

Monthly Rolling Totals - Aug 2005

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