Monthly Notifiable Disease Surveillance Report - Jul 2011
Tuesday 21st March 2023
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Key notifiable disease trends
- Chemical poisoning from the environment: One case of elevated blood mercury was notified in July 2011of a male in the 60-69 years age group from Nelson Marlborough DHB. The source is still being investigated, but is possibly due to consumption of fish.
- Legionellosis: 26 cases of legionellosis were notified in July 2011 (10 confirmed, 1 probable, and 15 under investigation), compared to 12 cases notified in the same month of the previous year. The following section relates to the 11 confirmed and probable cases only. The highest numbers of cases were reported in Nelson Marlborough (3 cases), Auckland, and Canterbury (2 cases each) DHBs. Cases were distributed by age group as follows: 30-39 years (2), 40-49 years (1), 50-59 years (2), 60-69 years (5), and 70+ years (1). Seven hospitalisations were reported. Among the cases where risk information was recorded, six reported exposure to environmental sources of infection (two cases reported exposure to spa pools, two reported exposure to vineyards, one to compost/potting mix, and one to a possible contaminated water supply). The Legionella species was identified in nine cases: Legionella pneumophila serogroup 1 (5 cases), L. longbeachae serogroup 1 (2 cases), L. dumoffii and L. micdadei (1 case each).
- Listeriosis: Four cases of listeriosis, including one perinatal case, were notified in July 2011. The perinatal case was a Pacific Island female in the 20-29 years age group, from Capital and Coast DHB. The pregnancy reached full term. Listeria monocytogences was isolated from the newborn infant shortly after birth. The infant remained in hospital. The three laboratory confirmed non-perinatal cases were from Counties Manukau (2) and Canterbury (1) DHBs and were distributed by age group as follows: 30-39 years (1) and 70+ years (2). One case was reported to have an underlying illness. Risk factors were not reported for the remaining two cases.
- Measles: 64 cases of measles were notified in July 2011 (62 confirmed, 2 under investigation), compared to 52 cases notified in the previous month and no cases in the same month of the previous year (Figure 1). The remainder of this section relates to the 62 confirmed cases only. The cases were reported in Waitemata (45 cases), Waikato (10 cases), Auckland (4 cases), Northland , Counties Manukau and Lakes (1 case each) DHBs. Cases were distributed as follows:< 1 year (2), 1-4 years (9), 5-9 years 11), 10-14 years (17), 15-19 years (18), 20-29 years (3) and 30-39 years (2) age groups. Four hospitalisations were reported. The immunisation information was recorded for 55 of the cases, with five cases reported as having been immunised and 50 cases recorded as not immunised. The five immunised cases had all received one dose of vaccine. All but one of these cases were aged more than four years (the age by which two doses are recommended).
- Meningococcal disease: Fourteen cases of laboratory confirmed invasive meningococcal disease were notified during July 2011. Ten cases were notified in the previous month and 12 during the same month last year. The highest numbers of cases were reported in Northland, Waitemata, Auckland and Southern (two cases each) DHBs. The highest numbers of cases were in the 1-4 years (4 cases), less than 1 years (3 cases), and 15-19 years (3 cases) age groups. Seven cases were of European ethnicity, four of Maori ethnicity and three of Pacific Peoples ethnicity. The following strains were identified: B other (i.e. non-Epidemic strain) (5 cases), C (4 cases), Epidemic strain (2 cases), W135 (1 case), and non-groupable (1 case). One case is awaiting results.
- Mumps: 10 cases of mumps were notified in July 2011 (4 confirmed, 3 probable, and 3 under investigation), compared to 13 cases notified in the previous month and 6 cases in the same month of the previous year. The remainder of this section relates to the seven confirmed or probable cases only. The cases were reported in Nelson Marlborough (2 cases), Waitemata, Auckland, Waikato, Hutt Valley and Canterbury (1 case each) DHBs. Cases were distributed as follows: 1-4 years (2), 5-9 years (1), 20-29 years (2), and 30-39 years (1) and 60-69 years (1) age groups. One hospitalisation was reported. Immunisation information was recorded for six cases. Of these, one case was fully immunised, one had received one dose of vaccine (case was aged less than 4 years and therefore only eligible for one dose), one was immunised but no dose information was available, and the remaining three cases were not immunised.
- Rickettsial disease: Three cases of laboratory confirmed murine typhus and one case of Q Fever were notified in July 2011. Among the murine typhus cases, two were male (aged 20-29 years and 70+ years), and one was female (aged 40-49years). Two cases were from Waikato DHB, and one case from Auckland DHB. Two cases were hospitalised (one unknown). None had been overseas during the incubation period. All three cases had contact with rodents. The Q fever case was found not to be a case after further investigation.
- Taeniasis: Two laboratory confirmed cases of taeniasis were notified in July 2011. Both cases (a female aged 30-39 years, and a male aged 50-59 years) were from Counties Manukau DHB and are thought to have contracted their disease in Myanmar.
- VTEC/STEC infection: 7 cases of VTEC/STEC infection were notified in July 2011 compared with 12 cases notified in the preceding month and 11 cases in the same month of the previous year. The cases were reported in Waitemata (3 cases), Northland, Counties Manukau, Bay of Plenty and Canterbury (one case each) DHBs. Cases were distributed by age group as follows: 1-4 years (1), 20-29 years (1), 30-39 years (2), 40-49 years (1), and 70+ years (2) age groups. Five cases were hospitalised. Escherichia coli O128:H2, O157:H7, O178:H23, O84:H2 was isolated in one case each. Among the cases for which risk factor information was recorded, 2/2 had contact with pets, 3/3 had contact with animals, 1/3 had recreational contact with water, 1/2 had contact with manure, 1/3 had contact with farm animals, 1/3 had contact with nappies and 1/3 handled raw meat or offal during the incubation period.
- Yersiniosis: 50 yersiniosis cases were notified in July 2011, compared to 31 cases notified in the preceding month and 27 cases the same month of the previous year. The highest numbers of cases were reported in Waikato (18 cases), Counties Manukau, Canterbury (7 cases each), and Auckland (6 cases) DHBs. The cases were aged from 10 months to 71 years with the highest number of cases in the 1-4 years (15 cases), and 25-44 years (12 cases) age groups. Two cases were hospitalised. The biotype involved was identified in 26 (52.0%) of the cases, with the highest number of isolations of Yersinia enterocolitica Biotype 4 (13 cases), Y. enterocolitica Biotype 2 (7 cases), and Y. enterocolitica Biotype 3 (2 cases). Among the cases for which risk factor information was recorded, 55.6% (10/18) had contact with farm animals, 23.5% (4/17) had contact with faecal matter, 19.0% (4/21) had been overseas, and 14.3% (2/14) had consumed untreated water during the incubation period. Countries visited were Australia, Brazil, South Africa and Thailand (one case each).
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Ph: +64 4 914 0700 Fax: +64 4 914 0770 Email: survqueries@esr.cri.nz |
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