Monthly Surveillance Report - Oct 2005

Tuesday 17th September 2019


Key Notifiable Disease Trends

  • Campylobacter: 1373 campylobacter cases were notified in October 2005 compared to 928 cases notified in the same month last year. Canterbury DHB recorded the highest number of cases (220). South Canterbury DHB recorded the highest current incidence rate of 740.8 per 100 000 population compared to the national rate of 353.9 per 100 000 population. Thirty-seven cases were hospitalised. Among the cases for whom this information was recorded 54.0% (101/187) had consumed food from a food premise, 15.5% (31/200) had faecal contact, 11.1% (21/190) had consumed untreated water, 10.3% (21/203) had recreational water contact, 10.2% (19/186) had contact with sick animals, 2.9% (10/342) had had contact with another case during the incubation period.
  • Legionellosis: eight cases of legionellosis were notified in October 2005 compared to four cases notified in the same month last year. Five cases were reported from Canterbury, and one each from Northland, Bay of Plenty, and Southland DHBs. The cases range in age from 37 to 85 years. The species involved was identified for seven of the eight cases as Legionella longbeachae sg 1  (4), L. longbeachae sg 2 (1), L. bozemanii sg 1 (1), and L. pneumophila sg 1/12 (1). Two of the confirmed cases had been overseas during the incubation period and two had been exposed to potting mix/compost. Four cases were hospitalised.
  • Leptospirosis: 14 leptospirosis cases were notified in October 2005 compared to six cases notified in the same month last year.  The cases were notified from MidCentral (4 cases), South Canterbury (3), Northland (2), and one each from Counties Manukau, Bay of Plenty, West Coast, Canterbury, and Otago DHBs. Among the 13 cases for whom occupation was recorded, six were farmers, five worked in the meat processing industry, one was a possum hunter, and one was a furniture manufacturer. The serovar was identified for eight cases as Leptospira Hardjo (7 cases), and L. Ballum (1 case).
  • Meningococcal disease: based on earliest date available , 16 cases of meningococcal disease were notified during October 2005, of which 14 (87.5%) were laboratory-confirmed. In comparison, 15 cases were notified the previous month, and 35 cases were notified during October 2004. For the previous 12 months, Hawke’s Bay DHB recorded the highest current rate of 11.1 per 100 000 population (16 cases). Counties Manukau DHB recorded the highest number of cases (31) with a current rate of 8.3 per 100 000 population. The national rate of disease was highest amongst infants aged less than one year (58.6 per 100 000 population, 32 cases), followed by those in the 1-4 years age group (21.7 per 100 000 population, 47 cases).
  • Mumps: 11 cases of mumps were notified in October 2005 compared to three cases notified in the same month last year. Six cases were aged between 5 to 9 years, three were in the 1 to 4 years, and two were in the 20 to 29 years age group. Vaccination status was recorded for five cases, of whom four were immunised. Two cases were laboratory confirmed.
  • Pertussis: 243 pertussis cases were notified in October 2005, of whom 40 (16.5%) were laboratory confirmed. Pertussis numbers have decreased from the peak in November 2004 with 613 cases (Figure 1). Canterbury DHB had the highest number of cases (114). For the previous 12 months, Southland DHB had the highest incidence rate of 391.9 per 100 000 population (405 cases), compared to a national rate of 93.0 per 100 000 population. Hospitalisation data was recorded for 169 cases of whom 7 (4.1%) were hospitalised. The rate by age group for the previous 12 months was highest amongst infants aged less than one year (274.5 per 100 000 population). This was followed by children in the 5-9 years age group (177.1) and the 10-14 years age group (170.3).
  • Salmonellosis: 130 salmonellosis cases were notified in October 2005 compared to 92 cases notified in the same month last year. Waikato and Canterbury DHBs had the highest number of cases (14 cases each). For the previous 12 months, Nelson-Marlborough DHB had the highest incidence rate of 67.8 per 100 000 population, compared to a national rate of 35.3 per 100 000 population. Hospitalisation data was recorded for 79 cases of whom 4 (5.1%) were hospitalised. The ESR Enteric Reference Laboratory received 128 isolates in October. The predominant types identified were Salmonella Typhimurium phage type 160 (28 isolates) and S. Brandenburg (16 isolates). Three uncommon Salmonella serotypes were isolated, S. Ruiru from a baby, S. Oslo (2 isolates) associated with travel to Cook Islands, and S. Albany (2 isolates). 
  • Shigellosis: 25 shigellosis cases were notified in October 2005 compared to six cases notified in the same month last year (Figure 2).  The cases were from Northland (12), Counties Manukau (4), Waitemata (2), Auckland (2), Capital and Coast (2), Waikato (1), Bay of Plenty (1), and Hutt (1) DHBs. One case was hospitalised. The ESR Enteric Reference Laboratory received isolates from 22 the 23 cases. The species involved were: Shigella sonnei Biotype a  (15), S. sonnei Biotype g (4), S. flexneri 4a (2), and S. flexneri 6 (1). Twelve of the S. sonnei Biotype a cases were part of a Northland outbreak linked to the consumption of recreationally collected raw oysters.
  • Yersioniosis: 43 cases of yersiniosis were notified in October 2005 compared to 25 cases notified in the same month last year. Canterbury DHB recorded the highest number of cases (8). West Coast DHB recorded the highest current incidence rate of 59.5 per 100 000 population compared to the national rate of 10.4 per 100 000 population. Among the cases for whom this information was recorded 50.0% (3/6) had consumed food from a food premise, 50.0% (3/6) had consumed untreated water, 33.3% (3/9) had recreational water contact, and 25.0% (2/8) had faecal contact during the incubation period. Three cases were hospitalised.

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Report:

Monthly Surveillance Report - Oct 2005

Tables:

Monthly National totals - Oct 2005

Monthly DHB Totals - Oct 2005

Monthly Rolling Totals - Oct 2005

 

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Monthly Surveillance Report - Oct 2005

Tables:

Monthly National totals - Oct 2005

Monthly DHB Totals - Oct 2005

Monthly Rolling Totals - Oct 2005

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