Monthly Notifiable Disease Surveillance Report - Sep 2010

Saturday 21st September 2019


Key notifiable disease trends

  • Brucellosis: One case of confirmed brucellosis was notified in September 2010. The case had travelled to United States of America where the disease was acquired.
  • Cholera: One probable case of cholera was notified in September 2010. The case has since been de-notified after laboratory tests indicated that the case was infected with a non O1 non O139 serogroup strain of Vibrio cholerae.
  • Campylobacteriosis: 665 cases of campylobacteriosis were notified in September 2010 compared to 574 cases notified in the same month of the previous year. Five hundred and seventy-seven cases were laboratory-confirmed.  For the 12-month period ending 30 September 2010, the highest incidence rates were reported in Taranaki (273.5 per 100 000 population, 296 cases), Hutt Valley (259.3 per 100 000, 370 cases), and Capital and Coast (232.2 per 100 000, 669 cases) DHBs compared to a national rate of 179.7 per 100 000.
  • Cryptosporidiosis:  182 cases of cryptosporidiosis were notified in September 2010 compared to 130 cases notified during the same month of the previous year (Figure 1). The highest number of cases was reported in Waikato DHB (58 cases), followed by Canterbury and South Canterbury DHBs (21 cases each). The highest number of cases was reported in the 1-4 years age group (68 cases). Two cases were hospitalised. Cryptosporidium parvum oocysts were detected in faecal specimens for 95.6% (174/182) of the cases. Among the cases where risk information was recorded, 84.5% (71/84) had contact with farm animals, 45.2% (19/42) had contact with sick animals, 38.8% (33/85) had attended school, 34.0% (16/47) had consumed food from a food premise, 34.0% (17/50) had contact with other symptomatic people, and 13.5% (7/52) had recreational contact with water.
  • Dengue fever: Nine cases of dengue fever were notified in September 2010 compared to two notified cases during the same month of the previous year. Cases were reported in the following DHBs: Auckland (3 cases), Otago (2 cases), Northland, Waitemata, Waikato, and Bay of Plenty (1 case each). The highest numbers of cases was in the 40-49 years (3 cases) and 60-69 years (2 cases) age groups. Three hospitalisations were reported. Overseas travel during the incubation period was reported for all cases. The countries visited were India (2), American Samoa, Australia, East Timor, Guatemala, Indonesia, Philippines, Singapore, Thailand, and Vanuatu (1 each).
  • Giardiasis: 176 cases of giardiasis were notified in September 2010  compared to 135 cases notified in the same month of the previous year. The highest number of cases was reported in Counties Manukau DHB (31 cases), followed by Auckland (29 cases) and Canterbury (28 cases) DHBs. Among the cases where risk information was recorded, 39.5% (15/38) had recreational contact with water, 35.4% (17/48) had attended school, and 32.5% (13/40) had contact with faecal matter, 31.7% (13/41) had contact with farm animals, 22.9% (11/48) had been overseas during the incubation period, and 16.1% (5/31) had consumed untreated water. Six Giardia outbreaks (4 completed, 2 interim) involving 13 cases were reported in September.
  • Hepatitis A: Seven cases of hepatitis A were notified in September 2010 (five confirmed, two under investigation).  Ethnicity was reported as Pacific Peoples (2 cases), Asian (2 cases), Maori (1 case), and is unknown for the remaining two cases.  Of the five confirmed cases, four reported overseas travel history during the incubation period. The remaining confirmed case most likely contracted the disease from an overseas visitor from Samoa.
  • Lead absorption: 17 cases of lead absorption were notified in September 2010 compared to 24 notified cases during the same month of the previous year. The highest number of cases was reported in Otago DHB. The cases were aged between 20-29 years and 60-69 years, with the highest number in the 50-59 years age group (6 cases). Occupation information was recorded for ten cases: painter/decorator (4 cases), miner (2 cases), builder, metal casting trades worker, sickness beneficiary, and retired (1 case each). Of these, two cases had reported occupational exposure to lead. Of the remaining seven cases, two reported exposure to lead through hobbies (small bore shooting).
  • Meningococcal disease: Based on the earliest date available, four cases of meningococcal disease were notified during September 2010, all of which were laboratory-confirmed.  In comparison, 11 cases (10 laboratory-confirmed) were notified in the previous month and 13 (all laboratory-confirmed) during the same month last year. For the 12-month period ending 30 September 2010, the highest incidence rate was reported in Tairawhiti DHB (6.5 per 100 000 population, 3 cases), followed by Northland (4.5 per 100 000, 7 cases), MidCentral (4.2 per 100 000, 7 cases) and Hutt Valley (4.2 per 100 000, 6 cases) DHBs.  The highest age-specific rate was in infants aged less than one year (34.9 per 100 000 population, 22 cases), followed by those in the 1-4 years age group (9.9 per 100 000, 24 cases).
  • Salmonellosis: 120 cases of salmonellosis were notified in September 2010 compared to 71 cases notified in the same month of the previous year (Figure 2). There were 108 (90.0%) laboratory-confirmed cases. The highest numbers of cases were reported from Canterbury (21 cases), Otago (13 cases) and Southland (10 cases) DHBs. The cases were aged between less than one year and over 70 years, with the highest numbers of cases in the 1-4 years (25 cases), 30-39 years (21 cases), 5-9 years and over 70 years (12 cases each) age groups. Twenty-four of the reported cases were hospitalised. The serotype involved was identified in 92 of the cases, and the dominant serotypes were Salmonella Typhimurium phage type RDNC-May 06 (21 cases), S. Typhimurium phage type 155 and S. Typhimurium phage type 160 (9 cases each). Ten of the cases were linked to a S. Typhimurium phage type 155 outbreak from a made to order chocolate mousse cake with uncooked egg white.
  • Toxic shellfish poisoning – unspecified: One probable case of toxic shellfish poisoning was reported in September 2010.  The case had consumed crabs, scallops and fish from a restaurant meal using imported products. The case was hospitalised.
  • Tuberculosis disease: 43 cases of tuberculosis disease were notified in September 2010, compared to 26 cases notified in the same month of the previous year. Twenty-three (53.5%) of the cases were laboratory confirmed. The highest number of cases was reported in Counties Manukau DHB (9 cases), followed by Auckland, Bay of Plenty, and Capital and Coast DHBs (6 cases each). Cases were aged between less than one year and 70+ years, with the highest number of cases in the 20-29 years age group (14 cases).  Ethnicity was recorded for 36 cases (83.7%): Asian (19 cases), Pacific Peoples (5 cases), European (5 cases) and Maori (3 cases). Twenty-three cases were born outside of New Zealand, of which ten had been born in India.

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Report:

Monthly Notifiable Disease Surveillance Report - Sep 2010

Tables:

Monthly National Totals - Sep 2010

Monthly DHB Totals - Sep 2010

Monthly Rolling Totals - Sep 2010

 

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Monthly Notifiable Disease Surveillance Report - Sep 2010

Tables:

Monthly National Totals - Sep 2010

Monthly DHB Totals - Sep 2010

Monthly Rolling Totals - Sep 2010

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