Monthly Notifiable Disease Surveillance Report - Jun 2015

Saturday 21st September 2019


Key notifiable disease trends

Brucellosis: One confirmed brucellosis case was notified in June 2015. The case was a male from Auckland DHB, who reported overseas travel to Saudi Arabia during the incubation period.

Chikungunya fever: Three chikungunya cases were notified in June 2015 (1 confirmed and 2 probable) compared to six cases notified during the same month of the previous year. The cases were reported from Waitemata (2 cases) and Southern (1 case) DHBs.  The cases were overseas during the incubation period and had travelled to Cook Islands (2 cases) and Samoa (1 case).

Cronobacter species: One probable Cronobacter species was reported from Waikato DHB. The case was a male in the 50–59 years age group with chronic illness and immune suppression.

Cysticercosis: One probable cysticercosis case was notified in June 2015. The case was a male from Waikato DHB, who reported overseas travel to Zambia during the incubation period.

Haemophilus influenzae type b: Six cases (2 confirmed and 4 under investigation) were notified in June 2015 compared to one case notified during the same month of the previous year. After further investigation, the cases that were under investigation have since been found to not meet the case criteria. The confirmed cases were from the West Coast DHB. Both cases were aged less than 5 years, and lived in a communal setting and were not vaccinated. One interim H. influenzae type boutbreak was created in EpiSurv in June from the West Coast (case numbers yet to be determined).   

Hepatitis A: Three cases (2 confirmed and 1 under investigation) were notified in June 2015 compared to one case notified during the same month of the previous year. The cases were reported from Counties Manukau, Tairawhiti, and MidCentral (1 case each) DHBs. The cases were in the 15–19 years (2 cases) and 70 years and over (1 case) age groups. Two cases were overseas during the incubation period and both had travelled to Cambodia.

Legionellosis: 17 cases were notified in June 2015 (10 confirmed, 4 probable, and 3 under investigation) compared to 24 cases notified during the previous month, and six during the same month of the previous year. The highest numbers of cases were reported from Canterbury (4 cases) and Bay of Plenty (3 cases) DHBs. The Legionella species was identified for 13 cases as: L. longbeachae (6 cases), L. pneumophila (5 cases), L. micdadei, and L. sainthelensi (1 case each). The increase in legionellosis notifications in June may be due to the LegiNZ study, which began in May 2015 and involves 20 hospitals in 17 DHBs. One interim L. pneumophila outbreak was created in EpiSurv in June from Canterbury (case numbers yet to be determined).   

Measles: Three cases of measles (2 confirmed and 1 under investigation) were notified in June 2015 compared to 98 cases notified during the same month of the previous year. After further investigation, the case that was under investigation has since been found to not meet the case criteria. The cases were reported from MidCentral DHB (2 cases) in the 20–29 years and 30–39 years age groups (1 case each).  One case was hospitalised and no deaths were reported. The cases were not vaccinated. Both cases were linked to an outbreak reported in May 2015 from MidCentral DHB. One interim measles outbreak was created in EpiSurv in June from MidCentral (case numbers yet to be determined).    

Meningococcal disease: Nine cases of meningococcal disease were notified in June 2015 compared to four cases notified during the same month of the previous year (Figure 1). The cases were reported from Counties Manukau (3 cases), Waikato (2 cases), Auckland, Lakes, Canterbury, and Southern (1 case each) DHBs. Five cases were less than 10 years: 1–4 years age group (3 cases), and under 1 year and 5–9 years age groups (1 case each). All nine cases were hospitalised and no deaths were reported. Eight cases were laboratory confirmed and the strain type was determined for seven cases: group B (5 cases, including two cases of B:P1.7-2,4) and group W135 (2 cases).

Mumps: Three cases of mumps (2 probable and 1 under investigation) were notified in June 2015 compared with zero cases notified during the same month of the previous year. After further investigation, one of the probable cases has since been found to not meet the case criteria. The cases were reported from Taranaki and South Canterbury (1 case each) DHBs. The cases were in the 5–9 years age groups. One of the cases was recorded as immunised and received two doses of the vaccine.

Pertussis: 100 cases of pertussis were notified in June 2015 compared to 85 cases in the same month of the previous year (Figure 2). After further investigation, four cases have since been found to not meet the case criteria. Eight cases were hospitalised and no deaths were reported. There were 24 (25.0%) cases laboratory-confirmed by isolation of Bordetella pertussis from the nasopharynx. A further 22 (22.9%) cases were laboratory-confirmed by PCR. The highest numbers of cases were reported from Canterbury (22 cases), Waitemata (18 cases), and Counties Manukau (13 cases) DHBs. The cases ranged in age from 2 months to 85 years, with 21.9% under 5 years old (including 7 cases aged less than 1 year). The highest numbers of cases were in the 10–14 years (17 cases) and 1–4 years years (14 cases) age groups. The vaccination status was recorded for 54 (56.3%) cases. Of these, 25 were reported as not vaccinated, five received one dose of vaccine, one received two doses of vaccine, 17 received three or more doses (including two who had received all five doses), and six were reported as being vaccinated but no dose information was available. Of the cases where the relevant information was recorded 44.2% (34/77) attended school, pre-school or childcare, and 39.5% (17/43) had contact with a laboratory-confirmed pertussis case. One finalised B. pertussis outbreak was created in June involving two cases.

Taeniasis: One confirmed case was notified in June 2015. The case was a female from Waitemata DHB, who reported overseas travel to Laos during the incubation period.

Tetanus: One confirmed case was notified in June 2015. The case was a female from Nelson Marlborough DHB in the 70 years and over age group who fell in a garden and sustained lacerations to her leg, scalp and elbow. This was a late notification with a date of onset in 2014.

Tuberculosis disease: 28 cases of tuberculosis disease (all new cases) were notified in June 2015 compared to 16 cases notified during the same month of the previous year. After further investigation, four cases have since been found to not meet the case criteria. The highest number of cases was reported in the Auckland region (12 cases). The cases ranged in age from 20 to 90 years, with the highest numbers of cases in the 20–29 years (6 cases) age group. Of the cases for which risk factor information was recorded, 72.7% (16/22) of cases were born outside of New Zealand. Twenty-one cases were laboratory confirmed. The mycobacterial species was recorded for 13 cases: all were infected with M. tuberculosis.

VTEC/STEC infection: 14 cases of VTEC/STEC infection (11 confirmed and 3 under investigation) were notified in June 2015 compared to nine cases notified during the same month of the previous year. After further investigation, two cases that were under investigation have since been found to not meet the case criteria. The highest numbers of cases were reported from Counties Manukau (4 cases), Waikato and Southern (2 cases each) DHBs. The highest numbers of cases occurred in the 1–4 years (4 cases), 5–9 years and 50–59 years (2 cases each) age groups. Four cases were hospitalised. Nine cases were confirmed by the Enteric Reference Laboratory as being infected with VTEC/STEC. The serotype was identified as O157:H7 (8 cases) and non-O157 (1 case). Among the cases for whom risk factor was recorded, 66.7% (4/6) had contact with animals and 33.3% (2/6) had contact with nappies during the incubation period.

Zika virus: One case still under investigation was notified in June 2015. The case was a male from Nelson Marlborough DHB, who reported overseas travel to the Cook Islands during the incubation period.

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Report:

Monthly Notifiable Disease Surveillance Report - June 2015

Tables:

Monthly National Totals - June 2015

Monthly DHB Totals - June 2015

Monthly Rolling Totals - June 2015

 

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Monthly Notifiable Disease Surveillance Report - June 2015

Tables:

Monthly National Totals - June 2015

Monthly DHB Totals - June 2015

Monthly Rolling Totals - June 2015

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