Monthly Notifiable Disease Surveillance Report - Aug 2010
Tuesday 21st March 2023
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Key notifiable disease trends
- Cholera: One case of cholera, still under investigation, was reported in August 2010. The case had travelled to Thailand and Australia.
- Cryptosporidiosis: 61 cases of cryptosporidiosis were notified in August 2010 compared to 48 cases notified during the same month of the previous year. The highest number of cases was reported in Waikato DHB (15 cases), followed by Waitemata DHB (9 cases). The highest number of cases was reported in the 1-4 years age group (23 cases). Three cases were hospitalised. Cryptosporidium parvum oocysts were detected in faecal specimens for 98.4% (60/61) of the cases.
- Giardiasis: 141 cases of giardiasis were notified in August 2010 compared to 127 cases notified in the same month of the previous year (Figure 1). The highest number of cases was reported in Canterbury DHB (31 cases), followed by Auckland (23 cases) and Waitemata (21 cases) DHBs. The cases were aged between less than one year and over 70 years, with the highest number of cases in the 30-39 year sage group (38 cases). Among the cases where risk information was recorded, 42.1% (16/38) had contact with faecal matter, 32.4% (12/37) had contact with farm animals, 31.3% (10/32) had consumed untreated water, 27.5% (14/51) had attended school, and.15.4% (6/39) had recreational contact with water. Seven Giardia outbreaks (6 completed, 1 interim) involving 25 cases were reported in August.
- Haemophilus influenzae type b: Two cases of Haemophilus influenzae serotype b were notified in August 2010. The cases were in Northland and Counties Manukau DHBs. One case was male and the other female. Both cases were aged less than 1 month and therefore not eligible for immunisation. Both cases have since been de-notified after further investigation.
- Hydatid disease: One confirmed case of hydatid disease from Tairawhiti DHB was notified in August 2010. The case was a female of Maori ethnicity in the 20-39 years age group. MAF has been informed and this case is still under investigation.
- Invasive pneumococcal disease: 72 cases of invasive pneumococcal disease were notified in August 2010. The highest number of cases were reported from Waitemata and Counties Manukau (10 cases each) DHBs. The cases were distributed by age as follows 4 (<1 years), 7 (1-4 years), 1 (5-9 years), 2 (10-14 years), 2 (15-19 years), 3 (20-29 years), 6 (30-39 years), 6 (40-49 years), 5 (50-59 years), 12 (60-69 years) and 23 (70+ years). There were 60 hospitalisations and three deaths from invasive pneumococcal disease reported. Of the cases where risk factor information was available, 65.4% (34/52) had a chronic illness, 31.1% (14/45) were current smokers, and 14.3% (7/49) were immunocompromised.
- Legionellosis: 26 cases of legionellosis were notified in August 2010 (4 confirmed, 3 probable and 19 under investigation) compared to two cases notified in the same month of the previous year. The highest number of cases were from Auckland and Counties Manukau (7 cases each) DHBs. Cases were aged between 15-19 years and over 70 years, with 69.2% (18/26) of cases aged over 40 years. There were 14 hospitalisations reported. The Legionella species was identified in 8 cases; Legionella dumoffii (2 cases), L. pneumophila serogroup 1 (2 cases), L. bozemanae serogroup 1, L. longbeachae serogroup 1 or 2, L. pneumophila serogroup 1, L. pneumophila serogroup 2 (1 case each).
- Meningococcal disease: Based on the earliest date available, 11 cases of meningococcal disease were notified during August 2010, nine (81.8%) of which were laboratory-confirmed. In comparison, 14 cases (12 laboratory-confirmed) were notified in the previous month and 26 (21 laboratory-confirmed) during the same month last year. For the 12-month period ending 31 August 2010, the highest incidence rate was reported in MidCentral DHB (7.2 per 100 000 population, 12 cases), followed by Tairawhiti (6.5 per 100 000, 3 cases), Hawke’s Bay and Northland (4.5 per 100 000, 7 cases each) DHBs. The highest age-specific rate was in infants aged less than one year (42.8 per 100 000 population, 27 cases), followed by those in the 1-4 years age group (13.6 per 100 000, 33 cases).
- Non-seasonal influenza: In New Zealand, non seasonal influenza A (H1N1) became notifiable on 29 April 2009 and 1144 cases of influenza A (H1N1) were notified in August 2010 (1108 confirmed, 12 probable and 24 under investigation), compared to 383 cases notified in July 2010. There were 445 hospitalised cases in August. The highest number of cases was recorded from Canterbury (175 cases) followed by Waikato (169 cases) and Bay of Plenty (133 cases) DHBs. For more information on the non seasonal influenza A (H1N1) situation in New Zealand see http://www.moh.govt.nz/influenza-a-h1n1.
- Rickettsial disease: Four cases of rickettsial disease were notified in August 2010 (1 confirmed, 1 probable, and 2 under investigation). One case was notified as murine typhus, one as Q fever, and the remaining two cases were for rickettsial disease that was not further specified. The laboratory-confirmed case of murine typhus was of a female aged 40-49 years from Waikato DHB who had been in contact with rats. The probable case of Q fever was of a male in the 50-59 years age group from Waikato DHB who had been in contact with animals. MAF was informed of this case. The two cases of Rickettsial disease, both still under investigation, had been overseas during the incubation period in Fiji and Samoa.
- Salmonellosis: 96 cases of salmonellosis were notified in August 2010 compared to 80 cases notified in the same month of the previous year (Figure 2). There were 84 (87.5%) laboratory-confirmed cases. The highest numbers of cases were reported from Waitemata (16 cases), Otago (11 cases) and Canterbury (10 cases) DHBs. The cases were aged between less than one year and over 70 years, with the highest numbers of cases in the 1-4 years (15 cases), 40-49 years (14 cases), 60-69 years (13 cases) and 30-39 years (12 cases) age groups. Six of the reported cases were hospitalised. The serotype involved was identified in 56 of the cases, and the dominant serotypes were Salmonella Typhimurium phage type RDNC-May 06 (7 cases), S. Typhimurium phage type 160 (7 cases), and S. Brandenburg (4 cases).
- VTEC/STEC infection: 21 cases of VTEC/STEC infection were notified in August 2010, compared to seven cases notified in the same month of the previous year. The cases were aged from less than 1 year to 70+ years, with the highest number of cases in children under 5 years (11 cases). Five cases were hospitalised. Escherichia coli O157:H7 was isolated in 14 cases and E. coli ONT:H23 in one case. Among the cases for which risk factor information was recorded, 100% (7/7) had contact with manure, 88.9% (8/9) had contact with animals, 44.4% (4/9) had contact with children in nappies, and 22.2% (2/9) had contact with another person with similar symptoms.
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Ph: +64 4 914 0700 Fax: +64 4 914 0770 Email: survqueries@esr.cri.nz |
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