Monthly Notifiable Disease Surveillance Report - Jul 2010

Wednesday 18th September 2019


Key notifiable disease trends

  • Campylobacteriosis: 442 cases of campylobacteriosis were notified in July 2010 compared to 416 cases notified in the same month of the previous year. Three hundred and seventy cases were laboratory-confirmed.  For the 12-month period ending 31 July 2010, the highest incidence rates were reported in Hutt Valley (278.9 per 100 000 population, 398 cases), Taranaki (258.7 per 100 000, 280 cases), and Capital and Coast (247.5 per 100 000, 713 cases) DHBs compared to a national rate of 176.0 per 100 000.
  • Giardiasis: 161 cases of giardiasis were notified in July 2010 compared to 119 cases notified in the same month of the previous year. The highest number of cases was reported in Canterbury DHB (33 cases), followed by Auckland DHB (21 cases).  Among the cases where risk information was recorded, 49.0% (25/51) had contact with other symptomatic people, 35.7% (15/42) had consumed food from a food premise, 31.6% (12/38) had consumed untreated water, 25.8% (16/62) had been overseas during the incubation period, 20.0% (10/50) had recreational contact with water, and 17.6% (9/51) had contact with farm animals during the incubation period. Seven Giardia outbreaks involving 30 cases were reported in July.
  • Legionellosis: 22 cases of legionellosis were notified in July 2010 (4 confirmed, 4 probable and 14 under investigation) compared to one case notified in the same month of the previous year.  The highest number of cases were from Counties Manukau (6 cases), Waitemata and Auckland (5 cases each) DHBs.  Cases were aged between 20-29 years and over 70 years, with the highest number of cases in the 50-59 years age group (6 cases). Sixteen cases were hospitalised. The Legionella species was identified in 14 cases; Legionella dumoffii (3 cases), L. gormanii (2 cases), L. longbeachae, L. longbeachae serogroup 1, L. longbeachae serogroup 1 or 2, L. pneumophila serogroup 12, L. pneumophila serogroup 4 or 10, L. pneumophila serogroup 4 or 15, L. pneumophila serogroup 6, L. pneumophila serogroup 1 and Legionella species (1 case each).
  • Meningococcal disease: Based on the earliest date available1, 14 cases of meningococcal disease were notified during July 2010, 12 (85.7%) of which were laboratory-confirmed.  In comparison, 10 cases were notified in the previous month and 23 during the same month last year. For the 12-month period ending 31 July 2010, the highest incidence rate was reported in MidCentral DHB (7.2 per 100 000 population, 12 cases), followed by Tairawhiti (6.5 per 100 000, 3 cases) and Northland (5.1 per 100 000, 8 cases) DHBs.  The highest age-specific rate was in infants aged less than one year (46.0 per 100 000 population, 29 cases), followed by those in the 1-4 years age group (14.8 per 100 000, 36 cases).
  • Rickettsial disease: Seven cases of rickettsial disease were notified in July 2010 (5 confirmed, 2 under investigation). Six cases were notified with murine typhus and the remaining case was for rickettsial disease that was not further specified. The cases were from Waikato (4 cases), Waitemata (2 cases), and Auckland (1 case) DHBs. Five cases were female and two were male. The cases were aged between 15-19 years and over 70 years, with five cases in the 40-49 years age group. Three of the cases had not travelled overseas during the incubation period and travel history of the remaining four cases is unknown.
  • Shigellosis: 18 cases of shigellosis were notified in July 2010 compared to five in the same month of the previous year. Two cases were hospitalised. The highest number of cases were reported in Northland DHB (4 cases), followed by Waitemata and Waikato (3 cases each) DHBs. Cases were aged between 1-4 years and 60-69 years, with the highest number of notifications in the 40-49 years age group (5 cases). The serotype involved was identified for 15 cases: Shigella flexneri 2b (5 cases), S. sonnei biotype a (5 cases), S. sonnei biotype g (2 cases), S. boydii 13 (1 case), S. flexneri 1 (1 case), and S. flexneri 2a (1 case). Two cases from Waikato DHB were part of an outbreak. Five of the cases reported overseas travel during the incubation period to Fiji (4 cases) and Bangladesh (1 case).
  • Salmonellosis: 77 cases of salmonellosis were notified in July 2010 compared to 62 cases notified in the same month of the previous year (Figure 2). The highest numbers of cases were reported from Waitemata and Auckland (15 cases each) DHBs, followed by Canterbury (9 cases), Waikato and Otago (7 cases each) DHBs.  Of the cases reported, 36 (47%) were from the Auckland region. The highest number of cases were in the 1-4 years (20 cases), 20-29 years (13 cases), and 50-59 years (11 cases) age groups. Twelve of reported cases were hospitalised. The serotype involved was identified in 48 of the cases. The dominant serotypes were Salmonella Typhimurium phage type RDNC-May 06 (7), S. Stanley, Salmonella subspecies I 4,5,12 : i : -, and S. Typhimurium phage type 135 (4 each). Three of the cases were part of the Salmonella Typhimurium phage type RDNC-May 06 outbreak reported from the Auckland region in July.
  • VTEC/STEC infection: 15 cases of VTEC/STEC infection were notified in July 2010, compared to three cases notified in the same month of the previous year. The cases were aged from less than 1 year to 50-59 years, with the highest number of cases in children under 5 years (13 cases). One case was hospitalised. Escherichia coli O157:H7 was isolated in eight cases. Among the cases for which risk factor information was recorded, 100% (5/5) had contact with animals, 71.4% (5/7) had contact with children in nappies, 62.5% (5/8) had contact with another person with similar symptoms, and 20.0% (1/5) had contact with manure.

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.   

Note: Click on the document links below to open. These documents are in PDF format. You will need to download the free Adobe Acrobat Reader to view them.

Report:

Monthly Notifiable Disease Surveillance Report - Jul 2010

Tables:

Monthly National Totals - Jul 2010

Monthly DHB Totals - Jul 2010

Monthly Rolling Totals - Jul 2010

 

DOWNLOADS

Monthly Notifiable Disease Surveillance Report - Jul 2010

Tables:

Monthly National Totals - Jul 2010

Monthly DHB Totals - Jul 2010

Monthly Rolling Totals - Jul 2010

Ph: +64 4 914 0700 Fax: +64 4 914 0770 Email: survqueries@esr.cri.nz