Monthly Notifiable Disease Surveillance Report - May 2014

Thursday 19th September 2019


Key notifiable disease trends

Chikungunya fever: Four cases of chikungunya fever were notified in May 2014 (1 confirmed, 2 probable, and 1 under investigation). Two of the cases were males and two of the cases were females. The cases occurred in the 20–29 years, 30–39 years, 40–49 years and 50–59 years age groups (1 case each). The cases were from Waitemata, Auckland, Counties Manukau and Hutt Valley DHBs (1 case each). All of the cases were in Tonga during the incubation period.

Cryptosporidiosis: 30 cases of cryptosporidiosis were notified in May 2014 compared to 133 cases notified during the same month of the previous year (Figure 1). The cases ranged in age from 11 months to 74 years, with the highest numbers of cases in the 1–4 years (7 cases) and 20–29 years (6 cases) age groups. The highest numbers of cases were reported from Waikato (5 cases), and Waitemata and Capital & Coast (4 cases each) DHBs. Among the cases where risk factor information was recorded, 53.3% (8/15) had consumed food from a food premises, 50.0% (7/14) had contact with faecal matter, 33.3% (5/15) had recreational contact with water and 31.3% (5/16) had attended school, preschool or childcare. Two Cryptosporidium outbreaks were reported in May, including one finalised outbreak (2 cases) and one interim outbreak (case numbers yet to be determined).

Giardiasis: 194 cases of giardiasis were notified in May 2014 compared to 161 cases notified during the same month of the previous year. The highest numbers of cases were reported from Auckland (25 cases), Canterbury (23 cases) and Waitemata (22 cases) DHBs. Of the cases for which risk factor information was recorded, 62.5% (35/56) had contact with faecal matter, 43.9% (25/57) had contact with other symptomatic people, 38.7% (24/62) had attended school, preschool or childcare, and 34.5% (20/58) had consumed food from a food premises. Eight Giardia outbreaks were reported in May, including two finalised outbreaks (4 cases) and six interim outbreaks (case numbers yet to be determined).

Hepatitis not otherwise specified (NOS): One confirmed case of hepatitis NOS was notified in May 2014. The case was a male in the 70+ years age group from Waitemata DHB. The case was infected with hepatitis E and had chronic liver disease, diabetes and gout.

Leprosy: One confirmed case of leprosy was notified in May 2014. The case was a male in the 30–39 years age group from Auckland DHB and was in Samoa during the incubation period for the disease.

Measles: 14 cases of measles were notified in May 2014 (12 confirmed and 2 under investigation), three of these cases have since been found to not meet case criteria after further investigation. This compared to zero cases notified during the same month of the previous year (Figure 2). The cases were reported from Waikato (5 cases), Counties Manukau (4 cases) and Auckland (2 cases) DHBs. Cases ranged in age from six months to 34 years, with the highest number of cases in the 10–14 years age group (5 cases). Hospitalisation status was recorded for all cases of which 45.5% (5/11) were hospitalised. No deaths were reported. Of the 10 cases with immunisation information, 20.0% (2/10) were recorded as being immunised. One case in the 10–14 years age group had received one dose of the MMR vaccine and the remaining case had no dose information recorded. Of the cases for which risk factor information was recorded, 80.0% (8/10) reported contact with another measles case in the previous three weeks and 50.0% (4/8) attended school, pre-school or childcare. Three measles outbreaks were reported in May, including one finalised outbreak (2 cases) and two interim outbreaks (case numbers yet to be determined).

Shigellosis: 15 cases of shigellosis were notified in May 2014, one of these cases has since been found to not meet case criteria after further investigation. Nine cases were notified in the same month of the previous year. The highest number of cases was reported from the Auckland region (8 cases). The serotype involved was recorded for all cases: Shigella sonnei biotype a and S. sonnei biotype g (5 cases each), S. boydii 1, S. boydii 2, S. flexneri 1b and S. sonnei biotype f (1 case each). Overseas travel during the incubation period was recorded for 8 (57.1%) cases. Countries visited included India and Singapore (3 cases each), Nepal (2 cases), and Fiji (1 case). Some cases visited more than one country. One case did not have any countries recorded but worked as a pilot. One finalised Shigella outbreak was reported in May (7 cases).

VTEC/STEC infection: 26 cases of VTEC/STEC infection were notified in May 2014, two of these cases have since been found to not meet case criteria after further investigation. This compares with 32 cases notified in the same month of the previous year. The highest numbers of cases were reported from Canterbury (8 cases) and Waikato (7 cases) DHBs. The highest number of cases occurred in the 1–4 years age group (11 cases). Four cases were hospitalised. The serotype/organism was identified by the Enteric Reference Laboratory for 20 cases all of which were Escherichia coli O157:H7. Among the cases for which risk factor information was recorded, 93.3% (14/15) had contact with animals, and 46.7% (7/15) attended school, pre-school or childcare. One interim E. coli O157:H7 outbreak was reported in May (case numbers yet to be determined).

Zika virus: 10 cases were notified in May 2014 (4 confirmed, 4 probable, 2 under investigation). Seven cases were female and three male. The age range for cases was 15–73 years with the highest number of cases in the 50–59 years age group (4 cases). Cases were distributed by DHB as follows: Waikato (3 cases), Auckland and Counties Manukau (2 cases each), and Waitemata, Lakes and Taranaki (1 case each). Overseas travel during the incubation period was recorded for 9 (90.0%) cases of which all cases except one travelled to the Cook Islands. The remaining case had travelled to Tonga.

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Report:

Monthly Notifiable Disease Report - May 2014

Tables:

Monthly National Totals - May 2014

Monthly DHB Totals - May 2014

Monthly Rolling Totals - May 2014

 

DOWNLOADS

Monthly Notifiable Disease Report - May 2014

Tables:

Monthly National Totals - May 2014

Monthly DHB Totals - May 2014

Monthly Rolling Totals - May 2014

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