Monthly Notifiable Disease Surveillance Report - Oct 2014

Wednesday 18th September 2019


Key notifiable disease trends

Chikungunya fever: Three cases of chikungunya fever (2 confirmed and 1 probable) were notified in October 2014. Two cases were females in the 20–29 years and one male in the 60–69 years age groups. All cases reported overseas travel during the incubation period to Samoa (2 cases) and Trinidad and Tobago (1 case).

Cholera: One case of cholera was notified in October 2014. After further investigation, the case has since been found not to meet the case criteria.

Giardiasis: 108 cases of giardiasis were notified in October 2014 compared to 154 cases notified during the same month of the previous year. The highest numbers of cases were reported from Counties Manukau (20 cases), Canterbury (13 cases), and Waikato (11 cases) DHBs. Among the cases where risk factor information was recorded, 50.0% (15/30) had contact with farm animals, 50.0% (14/28) had contact with faecal matter, 38.7% (12/31) had contact with other symptomatic people, 36.7% (11/30) had consumed untreated water, and 33.3% (13/39) attended school, pre-school or childcare. Five Giardia outbreaks were reported in October including four finalised outbreaks (14 cases) and one interim outbreak (case numbers yet to be determined).

Leptospirosis: 14 cases of leptospirosis were notified in October 2014 (4 confirmed, 2 probable and 8 under investigation). This compared to three cases notified during the same month of the previous year. The highest numbers of cases were reported from Northland (4 cases) and Hawke’s Bay (3 cases) DHBs. Occupation was recorded for 11 cases: famers or farm workers (8 cases) and freezing workers (2 cases). The one case that did not record a high-risk occupation had animal contact (feeding pigs at farm). Leptospira species were recorded for seven cases: Leptospira Hardjo (4 cases), and L. Pomona (2 cases), and L. Tarassovi (1 case).

Mumps: Seven cases of mumps were notified in October 2014 compared to zero cases notified during the same month of the previous year. After further investigation, five cases have since been found not to meet the case criteria. The remaining two cases were in the 5–9 years and 30–39 years age groups from Bay of Plenty and Waitemata DHBs, respectively. The probable case in the 5–9 years age group was not vaccinated. The vaccination history was unknown for the confirmed case.

Rickettsial disease: Two cases of murine typhus were notified in October 2014. The cases were males in the 30–39 years and 50–59 years age groups from Counties Manukau and Waikato DHBs, respectively. Both cases were hospitalised. One case had been in Malaysia and Indonesia during the incubation period. The other case had not travelled overseas during the incubation period for this disease but has had contact with rats.

Taeniasis: Two cases of taeniasis were notified in October 2014. The cases were a male in the 15–19 years and a female in the 20–29 years age groups from Canterbury and Capital & Coast DHBs, respectively. One of the cases was in Vietnam during the incubation period. The other case is still under investigation.

VTEC/STEC infection: 21 cases of VTEC/STEC infection were notified in October 2014 compared to seven cases notified during the same month of the previous year (Figure 1). After further investigation, three cases have since been found not to meet the case criteria. The highest numbers of cases were reported from Canterbury (5 cases) and Nelson Marlborough (3 cases) DHBs. The highest numbers of cases occurred in the 1–4 years (7 cases) and 60–69 years (4 cases) age groups. Seven cases were hospitalised. The serotype/organism was identified by the Enteric Reference Laboratory for 17 cases of which 88.2% (15/17) were Escherichia coli O157:H7. Among the cases for which risk factor information was recorded, 84.6% (11/13) had contact with animals, 20.0% (2/10) had contact with children in nappies, 15.4% (2/13) attended school, pre-school or childcare, and 15.4% (2/13) had recreational water contact.

Yersiniosis: 186 cases of yersiniosis were notified in October 2014 compared to 45 cases notified during the same month of the previous year (Figure 2). After further investigation, three of these cases have since been found not to meet the case criteria. The highest numbers of cases were reported from Canterbury (58 cases), Auckland (22 cases), and Waitemata (19 cases) DHBs. The cases ranged in age from five months to 91 years, with the highest numbers of cases in the 20–29 years (38 cases), 30–39 years (30 cases), and 40–49 years (26 cases) age groups. Forty-one cases were hospitalised. The Yersinia species involved was identified in 176 (96.2%) of the cases: Yersinia pseudotuberculosis (107 cases) and Y. enterocolitica (69 cases). The most common Y. enterocolitica biotype reported was biotype 1A (27 cases) followed by biotype 2 (10 cases), biotypes 3 and 4 (8 cases each), and 1B (1 case). Among the cases for which risk factor information was recorded, 77.5% (79/102) had consumed food from a food premises. Of the 79 who had consumed food from a food premises, 72.2% (57/79) had consumed food from a supermarket.

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Report:

Monthly Notifiable Disease Report - Oct 2014

Tables:

Monthly National Totals - Oct 2014

Monthly DHB Totals - Oct 2014

Monthly Rolling Totals - Oct 2014

 

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Monthly Notifiable Disease Report - Oct 2014

Tables:

Monthly National Totals - Oct 2014

Monthly DHB Totals - Oct 2014

Monthly Rolling Totals - Oct 2014

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