Monthly Notifiable Disease Surveillance Report - Sep 2012

Friday 20th September 2019


Key notifiable disease trends

  • Barmah Forest virus infection: One (still under investigation) case of Barmah Forest virus infection was notified in September 2012. The case was a female in the 70+ years age group from Auckland DHB and was in Australia during the incubation period.
  •  Cryptosporidiosis: 172 cases of cryptosporidiosis were notified in September 2012 compared to 136 cases notified during the same month of the previous year (Figure 1). The cases ranged in age from one month to 71 years, with the highest numbers of cases in the 1-4 years (69 cases) and in the 5-9 years (25 cases) age groups. The highest numbers of cases were reported in Waikato (67 cases), Canterbury (17 cases), and South Canterbury (15 cases) DHBs. Among the cases where risk factor information was recorded, 87.3% (89/102) had contact with farm animals, 60.3% (35/58) had contact with sick animals, 58.2% (39/67) had consumed untreated water, and 53.3% (48/90) had attended school, preschool or childcare. Seventeen cryptosporidiosis outbreaks were reported in September including five finalised outbreaks (18 cases) and 12 interim outbreaks (case numbers not yet established).
  • Dengue fever: 10 cases of dengue fever were notified in September 2012, compared to four cases during the same month of last year. All of the cases had travelled overseas during the incubation period, and the countries visited were Thailand (3), and Cambodia, Cook Islands, Fiji, India, Solomon Islands, Tonga and Viet Nam (1 case each).

  • Leptospirosis: 18 cases of leptospirosis were notified in September 2012 (7 confirmed and 11 under investigation), compared to three cases notified in the same month of the previous year. The following section relates to the seven confirmed cases only. These cases were from Northland, Auckland, Counties Manukau, Waikato, Whanganui, West Coast and Canterbury (1 case each). High risk occupations were recorded for four cases. All four cases were farmers or farm workers. Two other cases reported animal/outdoor exposures as a risk factor: one case was hunting and had direct contact with urine from wild animals, and the other was white water rafting in China. Leptospira species and serovars were recorded for six cases: Leptospira borgpetersenii sv Ballum (2), L. borgpetersenii sv Hardjo, L. borgpetersenii sv Tarassovi, L. interrogans sv Canicola and L. interrogans sv Pomona (1 each).

  • Listeriosis: Four cases of listeriosis (3 non-perinatal and 1 perinatal) were notified in September 2012. For the perinatal case, the foetus died at 22 weeks gestation.  The mother was from the MELAA (Middle Eastern Latin American African) ethnic group and was in the 20-29 years age group, from Waitemata DHB. The non-perinatal cases were from Auckland, Counties Manukau and Waikato (1 case each) DHBs and were distributed by age group as follows: 50-59 years (1) and 70+ years (2). Two of the three cases were reported to have underlying illness and/or were on immunosuppressive medication.

  • Pertussis: 583 cases of pertussis were notified in September 2012, compared with 592 cases notified the previous month and 210 cases in the same month of the previous year (Figure 2). Twenty-nine cases were hospitalised and no deaths were reported. There were 116 (19.9%) cases laboratory-confirmed by isolation of Bordetella pertussis from the nasopharynx. A further 106 (18.2%) cases were laboratory-confirmed by PCR. The highest number of cases was from Canterbury DHB (104), followed by Capital and Coast (83) and Waikato (51) DHBs. The cases ranged in age from one month to 86 years, with 21.1% (123/583 cases) under 5 years old (including 36 cases aged less than 1 year). The highest numbers of cases occurred in the 1-4 years (87), 40-49 years (84), 10-14 years (73), and 5-9 years (72) age groups. The vaccination status was recorded for 339 (58.1%) cases. Of these, 112 were reported as not vaccinated, 26 received one dose of vaccine, 12 received two doses of vaccine, 122 received three or more doses (including 18 who had received all five doses), and 67 were reported as being vaccinated but no dose information was available. Of the cases where the relevant information was recorded, 47.3% (200/423) attended school, pre-school or childcare, and 42.4% (109/257) had contact with a laboratory-confirmed pertussis case. Fourteen B. pertussis outbreaks involving 46 cases in total were reported in September.   

  • Taeniasis: One confirmed case of taeniasis was notified in September 2012. The case was a male in the 40-49 years age group from Capital and Coast DHB and was in Ethiopia during the incubation period.

  • VTEC/STEC infection: 13 cases of VTEC/STEC infection were notified in September 2012, four of these cases have since been made “not a case” after further investigation. This compares with six cases notified in the same month of the previous year. The remaining nine cases were from the following DHBs: Canterbury (3), Waikato and Taranaki (2 cases each), and Auckland and Waitemata (1 case each). The highest number of cases occurred in the 1-4 years age group (4 cases). Four cases were hospitalised. The serotype/organism was confirmed by the enteric reference laboratory for six cases as Escherichia coli O157:H7. Among the cases for which risk factor was recorded, 100.0% (7/7) cases had contact with animals, 42.9% (3/7) attended school, pre-school or childcare, and contact with manure 50.0% (3/6). 

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 - Sep 2012

Tables:

Monthly National Totals - Sep 2012

Monthly DHB Totals - Sep 2012

Monthly Rolling Totals - Sep 2012

 

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Monthly Notifiable Disease Surveillance Report - Sep 2012

Tables:

Monthly National Totals - Sep 2012

Monthly DHB Totals - Sep 2012

Monthly Rolling Totals - Sep 2012

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