Monthly Notifiable Disease Surveillance Report - May 2010

Saturday 21st September 2019


Key notifiable disease trends

  • Campylobacteriosis: 449 cases of campylobacteriosis were notified in May 2010 compared to 425 cases notified in the same month of the previous year. Three hundred and sixty-eight cases were laboratory-confirmed.  For the 12-month period ending 31 May 2010, the highest incidence rates were reported in Hutt Valley (278.9 per 100 000 population, 398 cases), Taranaki (253.1 per 100 000, 274 cases), and Capital and Coast (247.5 per 100 000, 713 cases) DHBs compared to a national rate of 174.1 per 100 000.
  • Cryptosporidiosis: 56 cases of cryptosporidiosis were notified in May 2010 compared to 45 cases notified during the same month of the previous year.  The highest number of cases was reported in the 1-4 years age group (19 cases).  One case was hospitalised.  The highest number of cases was reported in Canterbury DHB (18 cases), followed by Auckland (8 cases) and Waikato (8 cases) DHBs.  Cryptosporidium parvum oocysts were detected in faecal specimens for 96.4% (54/56) of the cases.  Two Cryptosporidium outbreaks (one completed and one interim) involving seven cases were reported in May.
  • Giardiasis: 186 cases of giardiasis were notified in May 2010 compared to 148 cases notified in the same month the previous year. The highest number of cases was reported in Auckland DHB (31 cases), followed by Hawke’s Bay (23 cases), Waikato (21 cases) and Canterbury (20 cases) DHBs. Among the cases where risk information was recorded, 58.5% (31/53) had faecal contact, 48.1% (26/54) had contact with other symptomatic people, 36.7% (18/31) had consumed food from a food premise, 30.8% (16/52) had recreational contact with water, 28.6% (12/42) had consumed untreated water and 25.0% (13/52) had contact with farm animals. Ten Giardia outbreaks (eight final and two interim) involving 40 cases were reported in May.
  • Hepatitis A:   Eight cases of hepatitis A were notified in May 2010 compared to four cases in the same month of the previous year.  Ethnicity was reported as Asian (2 cases), Maori (1 case), Pacific Peoples (1 case), European (3 cases) and is unknown for the remaining case.  One case reported overseas travel during the incubation period and the country visited was India.  Two cases did not report overseas travel during the incubation period.  Of these two cases, one was possibly exposed through eating shellfish from various Northland locations and the other case had no obvious risk factors.
  • Invasive pneumococcal disease: 44 cases of invasive pneumococcal disease (39 confirmed, 5 under investigation) were notified in May 2010 compared to 34 cases notified in the same month the previous year. The highest number of cases were reported in Counties Manukau (8 cases) followed by Waitemata and Waikato (5 cases each) DHBs. Of the 44 cases, 38 (86.4%) were aged 25 years or older. There were 38 (86.4%) hospitalisations and two deaths reported during May.
  • Legionellosis: 18 cases of legionellosis were notified in May 2010 (4 confirmed, 2 probable and 12 under investigation) compared to six cases notified in the same month of the previous year.  The highest number of cases were from Counties Manukau (5 cases), Auckland (4 cases), Waitemata and Canterbury (3 cases each) DHBs.  The cases were distributed by age as follows: 5-9 years, 10-14 years, 15-19 years (1 case each), 20-29 years (2 cases), 30-39 years (1 case), 40-49 years (2 case), 50-59 years (4 cases), 60-69 years (2 cases) and 70+ years (4 cases).  Eleven cases were hospitalised. The species involved was identified in six cases; Legionella pneumophila serogroup 1 (3 cases), L. longbeachae serogroup 1 (1 case), L. longbeachae serogroup 1 or 2 (1 case), L. micdadei (1 case).
  • Meningococcal disease: Based on the earliest date available1, seven cases of meningococcal disease were notified during May 2010, all of which were laboratory-confirmed.  In comparison, eight cases were notified in the previous month and five during the same month last year. For the 12-month period ending 31 May 2010, the highest incidence rate was reported in Tairawhiti DHB (10.8 per 100 000 population, 5 cases), followed by MidCentral (6.0 per 100 000, 10 cases) and Hutt Valley (4.9 per 100 000, 7 cases) DHBs.  The highest age-specific rate was in infants aged less than one year (50.7 per 100 000 population, 32 cases), followed by those in the 1-4 years age group (14.8 per 100 000, 36 cases).
  • Mumps: Ten cases of mumps (2 probable, 8 under investigation) were notified in May 2010 compared to three cases in the same month of the previous year. The highest number of cases was reported in Auckland DHB (3 cases), followed by Capital and Coast, and Counties Manukau DHBs (2 cases each). Three of the 10 cases were aged 18 years or older. Of the 10 cases reported, five cases were of Pacific Peoples ethnicity. 
  • VTEC/STEC infection: 11 cases of VTEC/STEC infection were notified in May 2010, compared to five cases notified in the same month of the previous year.  The highest numbers of cases were reported in Canterbury (4 cases) and Waikato (3 cases) DHBs.  The cases were aged between less than 1 year and 60-69 years, with the highest number of cases in the 1-4 years age group (7 cases). Three cases were hospitalised. Escherichia coli O157:H7 was isolated in six cases. Among the cases for which risk factor information was recorded, four cases had contact with children in nappies, three had contact with animals, two had contact with another person with similar symptoms, and two had recreational contact with water.
  • Yersiniosis: 32 cases of yersiniosis were notified in May 2010 compared to 20 cases notified in the previous month and 28 cases in the same month of the previous year. One case was hospitalised. The highest number of notifications was reported in Capital and Coast DHB (6 cases), followed by Waikato DHB (4 cases). Cases were aged between less than 1 year and 70+ years, with the highest number of notifications in the 1-4 years age group (9 cases). The serotype involved was identified for 17 of the cases: Yersinia enterocolitica biotype 4 (10), Y. enterocolitica biotype 3 (5), and Y. enterocolitica biotype 1A (2).


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.   

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Report:

Monthly Notifiable Disease Surveillance Report - May 2010

Tables:

Monthly National Totals - May 2010

Monthly DHB Totals - May 2010

Monthly Rolling Totals - May 2010

 

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Monthly Notifiable Disease Surveillance Report - May 2010

Tables:

Monthly National Totals - May 2010

Monthly DHB Totals - May 2010

Monthly Rolling Totals - May 2010

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