Monthly Notifiable Disease Surveillance Report - Dec 2014

Wednesday 18th September 2019


Key notifiable disease trends

Botulism: One probable case of botulism was notified in December 2014. The case was a male in the 50–59 years age group who was a visitor in New Zealand from Japan. The probable source was a risotto meal, inappropriately stored without refrigeration.

Chikungunya fever: 18 cases of chikungunya fever (15 confirmed and 3 probable) were notified in December 2014. All cases reported overseas travel during the incubation period to Samoa (16 cases), French Polynesia, and Kiribati (1 case each).

Cryptosporidiosis: 24 cases of cryptosporidiosis were notified in December 2014 compared to 32 cases notified during the same month of the previous year. The cases ranged in age from 10 months to 59 years, with the highest number of cases in the 1–4 years (7 cases) age group. The highest numbers of cases were reported from Southern (6 cases) and Nelson Marlborough (4 cases) DHBs. Among the cases where risk factor information was recorded, 50.0% (5/10) had contact with farm animals, and 50.0% (5/10) had consumed untreated water.

Hepatitis NOS: One case of hepatitis NOS (hepatitis delta) was notified in December 2014. The case was a male in the 20–29 years age group from Waitemata DHB. The probable source was home tattoo in Kirabati in mid-2013.

Pertussis: 57 cases of pertussis were notified in December 2014 compared to 158 cases in the same month of the previous year (Figure 1). Three cases were hospitalised and no deaths were reported. There were 38 (66.7%) cases laboratory-confirmed: 29 cases by isolation of Bordetella pertussis from the nasopharynx and nine cases by PCR. The highest numbers of cases were reported from Auckland (13 cases), Waitemata (11 cases), and Counties Manukau (9 cases) DHBs. The cases ranged in age from 22 days to 92 years, with 22.8% under 5 years old (including five cases aged less than 1 year). The highest number of cases occurred in the 20–29 years (11 cases) and in the 60–69 years age groups (9 cases). The vaccination status was recorded for 23 (40.4%) of cases. Of these, eight were reported as not vaccinated, one received one dose of vaccine, one received two doses of vaccine, eight received three or more doses (including one who had received all five doses), and five were reported as being vaccinated but no dose information was available. Of the cases where the relevant information was recorded, 29.0% (9/31) had contact with a laboratory-confirmed pertussis case and 21.7% (5/23) attended school, pre-school or childcare.

Paralytic shellfish poisoning: 14 cases of paralytic shellfish poisoning were reported in December 2014. Twelve of the 14 cases were part of an outbreak of toxic shellfish poisoning reported in the Bay of Plenty region. These 12 cases had consumed tuatuas (7 cases) and mussels (5 cases) collected from the Bay of Plenty coastline. One interim toxic shellfish poisoning outbreak involving 12 cases was reported in December 2014.

Tuberculosis disease: 37 cases of tuberculosis disease (36 – new case and 1 reactivation) were notified in December 2014 compared to 24 cases notified during the same month of the previous year. Twenty-seven cases were laboratory confirmed. The highest number of cases was reported in the Auckland region (17 cases). The cases ranged in age from 18 years to 84 years, with the highest numbers of cases in the 30–39 years (9 cases) and 20–29 years (8 cases) age groups. 79.3% (23/29) of cases were born outside of New Zealand. The Mycobacterium species was recorded in 74.1% (20/27) of the laboratory confirmed cases; all were infected with M. tuberculosis.

VTEC/STEC infection: 13 cases of VTEC/STEC infection (9 confirmed and 4 under investigation) were notified in December 2014 compared to four cases notified during the same month of the previous year (Figure 2). The cases were reported from Auckland, MidCentral, South Canterbury, and Southern (2 cases each), and Waitemata, Lakes, Taranaki, Whanganui and Canterbury (1 case each) DHBs. Five cases were hospitalised of which two had haemolytic uraemic syndrome. One death was reported. The highest number of cases occurred in the 40–49 years age group (4 cases). The serotype/organism was identified by the Enteric Reference Laboratory for the nine confirmed cases of which 88.9% (8/9) were Escherichia coli O157:H7. Among the cases for which risk factor information was recorded, 85.7% (6/7) had contact with animals, 50.0% (3/6) attended school, pre-school or childcare, and 20.0% (1/5) had consumed non-habitual water supply.

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Report:

Monthly Notifiable Disease Surveillance Report - Dec 2014

Tables:

Monthly National Totals - Dec 2014

Monthly DHB Totals - Dec 2014

Monthly Rolling Totals - Dec 2014

 

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Monthly Notifiable Disease Surveillance Report - Dec 2014

Tables:

Monthly National Totals - Dec 2014

Monthly DHB Totals - Dec 2014

Monthly Rolling Totals - Dec 2014

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