Monthly Notifiable Disease Surveillance Report - Mar 2012

Thursday 19th September 2019


Key notifiable disease trends

  • Campylobacteriosis:  549 Campylobacteriosis cases were notified in March 2012 compared to 474 cases notified in the same month of the previous year (Figure 1).  There were 468 (85.2%) laboratory-confirmed cases.  For the 12 month period ending 31 March 2012, the highest incidence rates were reported from South Canterbury (274.9 per 100 000 population, 155 cases), Wairarapa (239.0 per 100 000 population, 97 cases), Hawke's Bay (228.5 per 100 000 population, 356 cases), Canterbury (206.1 per 100 000 population, 1036 cases), and Waikato (201.5 per 100 000 population, 741 cases) DHBs compared to a national rate of 168.5 per 100 000 population.  One campylobacter outbreak from Waikato DHB was notified including five cases.

  •  Chemical poisoning from the environment:  One case of chemical poisoning due to exposure to chlorpyrifos was notified in March 2012. The case is a female in the 30-39 years age group from Waikato DHB.

  • Cryptosporidiosis: 47 cases of cryptosporidiosis were notified in March 2012 compared to 29 cases notified during the same month of the previous year (Figure 2).  The cases ranged in age from less than 1 year to 70 years and over age groups, with the highest number of cases in the 1-4 years (13 cases) and in the 30-39 years (9 cases) age groups.  The highest numbers of cases were reported in Capital and Coast (13 cases), and Hutt Valley and Waikato (7 cases each) DHBs. Among the cases where risk factor information was recorded, 50.0% (7/14) had consumed food from a food premise, 43.8% (7/16) had recreational water contact, 41.2% (7/17) had consumed untreated water, and 10.5% (2/19) were overseas during the incubation period.

  • Dengue fever: Nine cases of dengue fever were reported in March 2012 compared to two cases notified in the same month of the previous year. Seven of the cases had travelled overseas during the incubation period, and the countries visited were indicated for 6 cases as follows: Fiji (3), Indonesia, Thailand, and Tonga (1 case each). Two of the cases were hospitalised. Of those with available information, three cases had an onset date within the month of March while one case had an onset date within the month of February.

  • Hepatitis A: 33 cases of hepatitis A were notified in March 2012 (23 confirmed, 8 probable, 2 under investigation), compared with none in the same month of the previous year.  Ethnicity was reported as Asian (24 cases), Pacific Peoples, European and Other (2 each), Māori (1), and is unknown for the remaining case.  Of the confirmed cases with information available, four reported overseas travel history during the incubation period, 13 cases reported household contact with a confirmed case in previous two months, and one case had exposure to sewage.

  • Legionellosis: 18 cases of legionellosis were notified in March 2012 (11 confirmed, 3 probable, and 4 under investigation), compared to nine cases notified in the same month of the previous year. The following section relates to the 11 confirmed and probable cases only. These cases were reported in Waitemata (7 cases), Canterbury (3 cases) and Southern (1 case) DHBs. Cases were distributed by age group as follows: 70 years and older (4 cases), 60-69 years (3 cases), 40-49 years (2 cases), and 20-29 and 50-59 years (1 case each). Ten hospitalisations were reported. Among the cases where risk information was recorded, three reported exposure to environmental sources of infection (two cases reported exposure to compost/potting mix, and one to a possible contaminated water supply). The Legionella species was identified in two cases: Legionella longbeachae serogroup 2 and L. longbeachae serogroup unknown (1 case each). 

  • Leprosy: One case of leprosy was notified in March 2012. The case was a female of Pacific Peoples ethnicity in the 20-29 years age group. The case had been in Kiribati during the incubation period.

  • Pertussis: 379 cases of pertussis were notified in March 2012, compared with 457 cases notified the previous month and 57 cases in the same month of the previous year. There were 83 (21.9%) cases laboratory-confirmed by isolation of Bordetella pertussis from the nasopharynx and 141 (37.2%) cases were laboratory-confirmed by PCR. Monthly cases continue to decrease after a peak in December last year. The highest number of cases was reported in Nelson Marlborough DHB (72), followed by Canterbury (69), Capital and Coast (47), Counties Manukau (30), and Waitemata and Tairawhiti (21 cases each) DHBs. Cases occurred in all age groups, with 25.1% (95/378 cases) under 5 years old, including 21 cases aged less than 1 year. The highest numbers occurred in the 1-4 years (74), 5-9 years (47), 30-39 years (45), and 40-49 years (44) age groups. The vaccination status was recorded for 203 (53.6%) cases. Of these, 68 were reported as not vaccinated (including three cases aged less than 6 weeks and therefore not eligible for vaccination), two received one dose of vaccine, two received two doses, 17 received three or more doses, and 114 were reported as being vaccinated but no dose information was available. Of the 310 cases with hospitalisation information, 15 were hospitalised. No deaths were reported in March.

  • Shigellosis: 18 cases of shigellosis were notified in March 2012 compared with 13 cases notified in the previous month and 14 cases in the same month of the previous year. Cases occurred in the following DHBs: Waitemata (4 cases), Auckland, Counties Manukau, Waikato, Bay of Plenty, Capital and Coast, Canterbury, and Southern (2 cases each). The serotype involved was identified for 12 cases: Shigella sonnei biotype g (4), S. boydii 13 (3), S. flexneri 2a (3), and S. flexneri (2). Overseas travel during the incubation period was recorded for six cases. Countries visited or lived in were India (4 cases), Fiji and Samoa (1 case each).

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Report:

Monthly Notifiable Disease Surveillance Report - Mar 2012

Tables:

Monthly National Totals - Mar 2012

Monthly DHB Totals - Mar 2012

Monthly Rolling Totals - Mar 2012

 

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Monthly Notifiable Disease Surveillance Report - Mar 2012

Tables:

Monthly National Totals - Mar 2012

Monthly DHB Totals - Mar 2012

Monthly Rolling Totals - Mar 2012

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