Monthly Notifiable Disease Surveillance Report - Sep 2014

Thursday 19th September 2019


Key notifiable disease trends

Chikungunya fever: One confirmed case of chikungunya fever was notified in September 2014. The case was a female in the 60–69 years age group from Waitemata DHB. The case was in Samoa during the incubation period.

Leprosy: One confirmed case of tuberculoid leprosy was notified in September 2014. The case was a male in the 60–69 years age group from Hutt Valley DHB. The case was in Samoa during the incubation period.

Leptospirosis: 12 cases of leptospirosis were notified in September 2014 (4 confirmed, 3 probable and 5 under investigation). One of these cases has since been found not to meet the case criteria after further investigation. This compared to six cases notified during the same month of the previous year. The four confirmed cases were from Counties Manukau, Waikato, Hawke’s Bay, and Nelson Marlborough (1 case each) DHBs. Occupation was recorded for three cases: farmers (2 cases) and freezing worker (1 case). Leptospira species were recorded for three cases: Leptospira Hardjo (2 cases), and L. Copenhageni (1 case).

Rickettsial disease: One case of confirmed murine typhus (Rickettsia typhi) was notified in September 2014. The case was a male in the 60–69 years age group from Waikato DHB. The case lives in the bush and has contact with rats.

Ross River virus infection: One case of Ross River virus infection was notified in September 2014. The case was a male in the 50–59 years age group from Northland DHB. The case was in Australia during the incubation period.

Typhoid fever: Three cases of typhoid fever were notified in September 2014 compared to zero cases notified during the same month of the previous year. The cases were from Auckland (2 cases) and Tairawhiti (1 case) DHBs. The cases were in the 5–9 years (2 cases) and the 30–39 years (1 case) age groups. All cases were hospitalised. Two cases reported travelling during the incubation period and the countries they visited were India and Pakistan. The case that did not report overseas travel had contact with a relative from India who had typhoid fever before coming to New Zealand.

VTEC/STEC infection: 25 cases of VTEC/STEC infection were notified in September 2014 compared to 18 cases notified during the same month of the previous year (Figure 1). The highest number of cases was reported from Waikato DHB (8 cases). The highest number of cases occurred in the 1–4 years age group (9 cases). Seven cases were hospitalised. The serotype/organism was identified by the Enteric Reference Laboratory for 23 cases of which 87.0% (20/23) were Escherichia coli O157:H7. Among the cases for which risk factor information was recorded, 86.7% (13/15) had contact with animals and 60.0% (9/15) attended school, pre-school or childcare. One finalised outbreak of E. coli O157:H7 was reported in September involving two cases.

Yersiniosis: 181 cases of yersiniosis were notified in September 2014. Four of these cases have since been found not to meet the case criteria after further investigation (Figure 2). This compared to 57 cases notified during the same month of the previous year. The highest numbers of cases were reported from Canterbury (80 cases), Capital & Coast (19 cases), Auckland (14 cases) and Bay of Plenty (10 cases) DHBs. The cases ranged in age from 16 months to 86 years, with the highest numbers of cases in the 40–49 years (34 cases), 20–29 years (33 cases), 30–39 years (27 cases), 50–59 years (22 cases), and 60–69 years (19 cases) age groups. Thirty-nine cases were hospitalised. The biotype involved was identified in 156 (88.1%) of the cases: Yersinia pseudotuberculosis (119 cases), Y. enterocolitica biotype 1A (18 cases), Y. enterocolitica biotype 2 (11 cases), Y. enterocolitica biotype 3 and Y. enterocolitica biotype 4 (4 cases each). Among the cases for which risk factor information was recorded, 68.4% (54/79) had consumed food from a food premises, and 33.3% (30/90) had contact with farm animals.

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Report:

Monthly Notifiable Disease Report - Sep 2014

Tables:

Monthly National Totals - Sep 2014

Monthly DHB Totals - Sep 2014

Monthly Rolling Totals - Sep 2014

 

DOWNLOADS

Monthly Notifiable Disease Report - Sep 2014

Tables:

Monthly National Totals - Sep 2014

Monthly DHB Totals - Sep 2014

Monthly Rolling Totals - Sep 2014

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