Monthly Surveillance Report - Nov 2007

Monday 23rd September 2019


Key notifiable disease trends

  • Cysticercosis: one probable case of cysticercosis was notified in November 2007 based on a suggestive CT scan of the head. The case was aged between 10-14 years with no recent overseas travel, but was born in India.
  • Gastroenteritis: 72 cases of gastroenteritis were notified in November 2007 compared to 40 notified cases in the same month of the previous year. The highest numbers of cases were reported from Canterbury (18), Auckland (12) and Waitemata (8) DHBs. Nine cases were linked to four norovirus outbreaks.
  • Giardiasis: 116 cases of giardiasis were notified in November 2007 compared to 95 notified cases in the same month of the previous year. The highest numbers of cases were reported from Auckland (20), Waikato (13), and Capital and Coast (13) DHBs. Among the cases for whom this information was recorded, 50.0% (10/20) had contact with farm animals, 43.8% (7/16) had consumed untreated water, 40.0% (6/15) had faecal contact, 30.8% (4/13) had eaten at a food premise, 30.8% (8/26) had attended school, pre-school or childcare, 19.4% (7/36) had been overseas, 18.8% (3/16) had contact with a symptomatic case, 12.5% (2/16) had consumed non-habitual water supply, and 7.7% (2/26) had contact with a confirmed case during the incubation period.
  • Legionellosis:12 cases of legionellosis were notified in November 2007 compared to four notified cases in the same month of the previous year (Figure 1). The cases were from Counties Manukau (4), Auckland (3), Canterbury (2), Waitemata (1), Hutt (1), and Capital and Coast (1) DHBs.Four cases were hospitalised. The cases were in the following age groups: 70+ years (4), and 50-59 years (3), 60-69 years (2), 20-29 years (1), 30-39 years (1), and 40-49 years (1). The species involved was identified for six of the cases: Legionella longbeachae sg 1 or 2 (3), L. pneumophila 1 (2), and L. longbeachae (1). No samples were received for one of the cases. The remaining five cases are still undergoing laboratory testing to confirm their diagnosis.
  • Listeriosis: four cases of listeriosis, of which one was perinatal, were notified in November 2007, bringing the year to date total to 23. The three non-perinatal cases were aged 70+ years and all had underlying illnesses while the perinatal case was aged between 20-29 years. The perinatal case occurred at 36 weeks of gestation, the infant survived. The source was not identified.
  • Meningococcal disease: based on the earliest date available, five cases of meningococcal disease were notified during November 2007, all laboratory-confirmed.In comparison, nine cases were notified the previous month, October 2007, and 12 cases were notified during the same month last year, November 2006. For the 12 month period ending 30 November 2007, Tairawhiti DHB recorded the highest incidence rate of 9.0 per 100 000 population (4 cases), followed by Hawke’s Bay (6.6 per 100 000, 10 cases), Counties Manukau (4.3 per 100 000, 19 cases), and Hutt (4.3 per 100 000, 6 cases). The highest age-specific incidence rate was in infants aged less than one year (35.0 per 100 000 population, 20 cases), followed by those in the 1-4 years age group (14.6 per 100 000 population, 33 cases), and those in the 15-19 years age group (4.5 per 100 000 population, 14 cases).
  • Salmonellosis: 112 cases of salmonellosis were notified in November 2007 compared to 97 notified cases in the same month of the previous year (Figure 2). The highest numbers of cases were reported from Waitemata, Auckland, and Canterbury DHBs (11 cases each). Nine cases were hospitalised. The serotype involved was identified for 102 of the cases. The dominant serotypes were: Salmonella Typhimurium phage type 160 (16 cases), S. Chester (9), and S. Infantis (6). The nine S. Chester cases are being investigated as part of an outbreak.

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Report:

Monthly Surveillance Report - Nov 2007

Tables:

Monthly National Totals - Nov 2007

Monthly DHB Totals - Nov 2007

Monthly Rolling Totals - Nov 2007

 

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Monthly Surveillance Report - Nov 2007

Tables:

Monthly National Totals - Nov 2007

Monthly DHB Totals - Nov 2007

Monthly Rolling Totals - Nov 2007

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