Monthly Notifiable Disease Surveillance Report - May 2011

Saturday 21st September 2019


Key notifiable disease trends

  • Campylobacteriosis: 482 cases of campylobacteriosis were notified in May 2011 compared to 450 cases notified in the same month of the previous year. There were 399 (82.8%) cases that were laboratory-confirmed.  For the 12-month period ending 31 May 2011, the highest rates were reported in South Canterbury (218.4 per 100 000 population, 122 cases), Southern (203.5 per 100 000, 617 cases), and Hawke’s Bay (194.5 per 100 000, 302 cases) DHBs compared to a national rate of 152.1 per 100 000.
  • Gastroenteritis: 76 cases of gastroenteritis were notified in May 2011, compared to 34 cases notified in the same month of the previous year. A causal agent was confirmed for 24 (31.6%) cases and the pathogens reported were norovirus (23 cases) and rotavirus (1 case). In addition, there was one case with probable staphylococcal food intoxication. The highest number of cases was reported in MidCentral DHB (36 cases). Cases ranged in age between less than 1 year and 70+ years, with the highest number of cases in the 70+ years (29 cases) and 20-29 years (12 cases) age groups. Of the 76 cases reported, 31 were associated with 11 different outbreaks.
  • Legionellosis: 19 cases of legionellosis were notified in May 2011 (6 confirmed, 3 probable and 10 under investigation), compared to 7 cases notified in the same month of the previous year. The following section relates to the nine confirmed and probable cases only. The highest number of cases was reported in Northland DHB (6 cases). Cases were distributed by age group as follows: 30-39 years (1), 40-49 years (1), 50-59 years (2), 60-69 years (1), and 70+ years (4). Seven hospitalisations were reported. Among the cases where risk information was recorded, three reported exposure to environmental sources of infection (2 cases reported exposure to compost/potting mix and one to a spa pool), one was a smoker and one reported no obvious risk factors. The Legionella species was identified in four cases: Legionella longbeachae serogroup 1 or 2 (2 cases), L. longbeachae serogroup 1 and L. longbeachae serogroup 2 (1 case each).
  • Measles: 7 cases of measles were notified in May 2011 (3 confirmed, 1 probable, 3 under investigation), compared to 15 cases notified in the previous month and no cases in the same month of the previous year. The remainder of this section relates to the four confirmed and probable cases only. The cases were reported in Hawke’s Bay (2 cases), Waitemata, and Canterbury (1 case each) DHBs. Cases were distributed as follows: 1-4 years, 5-9 years, 20-29 years, and 30-39 years (1 case each) age groups. One hospitalisation was reported. Two cases were not immunised (including one case aged 15 months and therefore just eligible for immunisation) and the vaccination status was unknown for the remaining two cases.
  • Rickettsial disease: One case of rickettsial disease was notified in May 2011. The case was susequently reclassified as leptospiroris following a high L. borgpetersenii serovar Ballum titre. The case was a male in the 50-59 years age group from Waitemata DHB who had occupational contact with deer and rat urine.
  • Salmonellosis: 90 cases of salmonellosis were notified in May 2011, compared to 113 cases notified in the preceding month and 76 cases the same month of the previous year. The highest number of cases were reported in Canterbury (21 cases), Southern (12 cases), and Auckland (11 cases) DHBs. Cases occurred in all age groups, with the highest number of cases in 1-4 years age group (20 cases). Six cases were hospitalised. The serotype involved was identified in 32 (35.6%) of the cases. The most common serotypes were: Salmonella Infantis (7 cases), S. Typhimurium phage type 1 and S. Typhimurium phage type 101 (6 cases each). Among the cases for which risk factor information was recorded, 37.5% (15/40) had contact with farm animals, 34.2% (13/38) had consumed food from a food premise, 23.1% (9/39) had recreational contact with water, 22.7% (10/44) had travelled overseas and 20.0% (7/35) had consumed untreated water during the incubation period.
  • Tuberculosis disease: 35 cases of tuberculosis disease were notified in May 2011 (33 new cases and 2 reactivations), compared to 25 cases notified in the same month of the previous year (Figure 1).  The highest number of cases was reported from Auckland DHB (10 cases), followed by Counties Manukau DHB (6 cases).  Cases ranged in age between less than 1 year to 70+ years, with the highest numbers of cases in the 40-49 years (11 cases) and 60-69 years (7 cases) age groups. Of the 25 (71.4%) cases for which place of birth was recorded, 20 (80.0%) were born outside New Zealand.  Twenty (57.1%) cases were laboratory confirmed.  Of these, 16 cases had Mycobacterium tuberculosis isolated and the organism was unknown for the remaining four cases.
  • VTEC/STEC infection: 21 cases of VTEC/STEC infection were notified in May 2011, compared with 18 cases notified in the preceding month and 11 cases in the same month of the previous year (Figure 2). The highest numbers of cases were reported in Canterbury (5 cases) and Waitemata (4 cases) DHBs. Cases were distributed by as follows: less than 1 year (2 cases), 1-4 years (6), 5-9 years (4), 15-19 years (1), 40-49 years (1), 60-69 years (2), and 70+ years (5) age groups.  Six cases were hospitalised. Escherichia coli O157:H7 was isolated in 10 cases and E. coli O128:H2 in one case. Among the cases for which risk factor information was recorded, 87.5% (7/8) had contact with pets, 81.8% (9/11) had contact with animals, 75.0% (6/8) had consumed water from a non-habitual water supply, 33.3% (3/9) had contact with farm animals, and 20.0% (2/10) had attended school during the incubation period.

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Report:

Monthly Notifiable Disease Surveillance Report - May 2011

Tables:

Monthly National Totals - May 2011

Monthly DHB Totals - May 2011

Monthly Rolling Totals - May 2011

 

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Monthly Notifiable Disease Surveillance Report - May 2011

Tables:

Monthly National Totals - May 2011

Monthly DHB Totals - May 2011

Monthly Rolling Totals - May 2011

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