Monthly Notifiable Disease Surveillance Report - Jan 2011

Monday 23rd September 2019


Key notifiable disease trends

  • Campylobacteriosis: 548 cases of campylobacteriosis were notified in January 2011 compared to 840 cases notified in the same month of the previous year. Four hundred and seventy-five (86.7%) cases were laboratory-confirmed.  For the 12-month period ending 31 January 2011, the highest cumulative incidence were reported in Taranaki (237.0 per 100 000 population, 259 cases), Hutt Valley (217.7 per 100 000, 313 cases), and South Canterbury (216.6 per 100 000, 121 cases) DHBs compared to a national rate of 161.5 per 100 000.
  • Enterobacter (Cronobacter) sakazakii: One case of Enterobacter sakazakii was notified in January 2011. A different organism was identified upon reference laboratory testing and so the case’s status has been updated to ‘not a case’.
  • Giardiasis: 172 cases of giardiasis were notified in January 2011 compared to 150 cases notified in the same month of the previous year (Figure 1). The highest number of cases was reported in Waitemata DHB (27 cases), followed by Auckland (26 cases) and Canterbury (24) DHBs.  Among the cases where risk information was recorded, 37.0% (14/38) had contact with other symptomatic people, 36.0% (10/28) had consumed food from a food premise, 30.0% (9/30) had consumed untreated water, 14.3% (7/49) had been overseas during the incubation period, 56.3% (18/32) had recreational contact with water, and 32.4% (12/37) had contact with farm animals during the incubation period. Two Giardia outbreaks involving two cases each were reported as finalised in January. In addition, there are two interim giardiasis outbreaks still to be finalised.
  • Hydatid disease: One case of hydatid disease was notified in January 2011. The case was a 40-49 year old male from Waikato DHB and is still under investigation. Repeat serology is pending, but based on current knowledge of the case, it is most likely to be made ‘not a case’. 
  • Legionellosis: 21 cases of legionellosis were notified in January 2011 (6 confirmed, 5 probable and 10 under investigation) compared to 12 in the same month of the previous year. The following section is based on confirmed and probable cases only. The highest number of cases was reported in Canterbury DHB (6 cases), followed by Otago DHB (3 cases). Cases were distributed by age group as follows: 40-49 years (1), 50-59 years (3), 60-69 years (4), and 70+ years (3). Eight hospitalisations were reported. Among the cases where risk information was recorded, seven were exposed to environmental sources of infection (6 cases reported exposure to compost/potting mix and one to a respiratory therapy device), three were immunosuppressed or had a debilitating condition, and one was a smoker. The Legionella species was identified in seven cases: Legionella longbeachae serogroup 1 or 2 (5 cases) and L. longbeachae serogroup 1 (2 cases).
  • Measles: 11 cases of measles were notified in January 2011 (8 confirmed, 1 probable, 2 under investigation), compared to one case notified in the previous month and no cases in the same month of the previous year (Figure 2). There were eight laboratory confirmed cases. Nine of the cases were reported in the Auckland region, with the remaining cases from Capital and Coast and Canterbury DHBs (1 case each). Cases were distributed as follows: <1 year (1), 1-4 years (2), 5-9 years (1), 10-14 years (4), 15-19 years (2), and 20-29 years (1). One hospitalisation was reported. Ten cases had immunisation information recorded. Of these, one case had received one dose as appropriate, and the remaining nine cases had not been immunised. Eight of the 11 cases reported in January 2011 were part of an outbreak linked with international travel.
  • Meningococcal disease: Four cases of meningococcal disease were notified during January 2011, all of which were laboratory-confirmed.  In comparison, four cases (3 laboratory-confirmed) were notified in the previous month and seven (six laboratory-confirmed) during the same month of the previous year. For the 12-month period ending 31 January 2011, the highest incidence rates were reported in Hutt Valley (5.6 per 100 000 population, 8 cases), Hawke’s Bay (4.5 per 100 000, 7 cases), and Southland (4.4 per 100 000, 5 cases) DHBs.  The highest age-specific rate was in infants aged less than one year (40.8 per 100 000 population, 26 cases), followed by those in the 1-4 years age group (9.3 per 100 000, 23 cases).
  • Salmonellosis: 125 cases of salmonellosis were notified in January 2011 compared to 84 notified in the previous month and 99 cases the same month of the previous year. There were 111 (88.8%) laboratory-confirmed cases. Canterbury DHB reported the highest number of cases (18 cases), followed by Otago (15 cases), Southland (13 cases), and Counties Manukau (12 cases) DHBs. Salmonellosis occurred in all age groups, with the highest numbers of cases in the 40-49 years (21 cases), 50-59 years (18 cases), and 1-4 years (17 cases) age groups. Of the 65 cases with hospitalisation information, 15 were hospitalised. The serotype involved was identified in 85 of the cases, and most prevalent serotypes were Salmonella Typhimurium phage type 160 (13 cases), S. Typhimurium phage type 1 (9 cases), S. Typhimurium phage type RDNC-May 06 (8 cases), S. Infantis (8 cases), and S. Saintpaul (7 cases).
  • Taeniasis:  Two cases of taeniasis were notified in January 2011 of which one has been laboratory-confirmed although the species could not be determined. The laboratory-confirmed case was a female in the 20-29 years age group from Hutt Valley DHB, the case was from Sudan and is considered to have acquired the disease there.  The second case was a male of Asian ethnicity in the 30-39 years age group from Northland DHB who had previously acquired the infection while in the Philippines.
  • VTEC/STEC infection: 22 cases of VTEC/STEC infection were notified in January 2011, compared to four cases notified in the preceding month and nine cases in the same month of the previous year. Waikato DHB had the highest number of cases (9 cases). The cases were aged from one year to 70+ years, with the highest number of cases in children aged less than five years (8 cases). Seven cases were hospitalised. Escherichia coli O157:H7 was isolated in 16 cases. The serotype for the remaining cases is unknown as yet. Among the cases for which risk factor information was recorded, 90% (9/10) had contact with animals, 71.4% (5/7) had been on a farm, 50% (3/6) had contact with manure, 28.6% (2/7) had contact with children in nappies, and 20% (2/10) had contact with another person with similar symptoms.  One household outbreak involving four cases of Escherichia coli O157:H7 was reported from Waikato DHB during January.

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Report:

Monthly Notifiable Disease Surveillance Report - Jan 2011

Tables:

Monthly National Totals - Jan 2011

Monthly DHB Totals - Jan 2011

Monthly Rolling Totals - Jan 2011

 

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Monthly Notifiable Disease Surveillance Report - Jan 2011

Tables:

Monthly National Totals - Jan 2011

Monthly DHB Totals - Jan 2011

Monthly Rolling Totals - Jan 2011

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