Monthly Notifiable Disease Surveillance Report - Jul 2012

Wednesday 18th September 2019


Key notifiable disease trends

·    Cryptosporidiosis: 49 cases of cryptosporidiosis were notified in July 2012 compared to 19 cases notified during the same month of the previous year (Figure 1). The cases ranged in age from eight months to 75 years, with the highest numbers of cases in the 1-4 years (19 cases) and in the 30-39 years (10 cases) age groups. The highest numbers of cases were reported in Capital and Coast (20 cases) and Hutt Valley (6 cases) DHBs. Among the cases where risk factor information was recorded, 76.2% (16/21) had consumed food from a food premises, 58.6% (17/29) had contact with faecal matter, 48.4% (15/31) had contact with farm animals, 46.2% (12/26) had contact with other symptomatic people, and 45.2% (14/31) had recreational water contact during the incubation period.

·    Dengue fever: 16 cases of dengue fever were notified in July 2012, compared to five cases during the same month of last year. All of the cases had travelled overseas during the incubation period, and the countries visited were Indonesia (6), Thailand (3), Niue (2), and Cambodia, Fiji, India, Rarotonga and South America (1 case each). Six of the cases were hospitalised.

·    Hydatid disease: One case of hydatid disease was notified in July 2012. The case is a female in the 50-59 years age group and was reported from South Canterbury DHB. The case is not considered to have had a recent exposure to the disease.

·    Lead absorption: 28 cases of lead absorption were notified in July 2012 (27 confirmed and 1 under investigation), compared with 25 cases notified the previous month and 13 cases in the same month of the previous year. All of the cases were male. The highest number of cases was reported in the Auckland region (21 cases). The cases ranged in age from 19 to 70 years, with the highest numbers of cases in the 50-59 years (10 cases), 40-49 years (9 cases), and 30-39 years (4 cases) age groups. Where information was recorded, 86.4% (19/22) had exposure to lead materials at their place of work and 75.0% (3/4) had exposure to lead through a hobby. Two lead absorption outbreaks involving two cases each were reported in July.

·    Leptospirosis: 16 cases of leptospirosis were notified in July 2012 (7 confirmed, 2 probable and 7 under investigation cases), compared to seven cases notified in the same month of the previous year. The following section relates to the seven confirmed cases only. These cases were from Hawke’s Bay and Waikato (2 cases each), and South Canterbury, Wairarapa and West Coast (1 case each) DHBs. High risk occupations were recorded for seven cases: farmers or farm workers (4) and meat workers (3). Leptospira species and serovars were recorded for two cases: L. interrogans sv Copenhageni and L. borgpetersenii sv Hardjo (1 each).

·    Pertussis: 476 cases of pertussis were notified in July 2012, compared with 509 cases notified the previous month and 74 cases in the same month of the previous year. Twenty-one cases were hospitalised and no deaths were reported. There were 74 (15.5%) cases laboratory-confirmed by isolation of Bordetella pertussis from the nasopharynx. A further 95 (20.0%) cases were laboratory-confirmed by PCR. The highest number of cases was from Canterbury DHB (101), followed by Nelson Marlborough (52), and Capital and Coast (48) DHBs. The cases ranged in age from one month to 91 years, with 23.7% (113/476 cases) under 5 years old (including 32 cases aged less than 1 year). The highest numbers of cases occurred in the 1-4 years (81), 30-39 years (77), 5-9 years (59), and 40-49 years (50) age groups. The vaccination status was recorded for 258 (54.2%) cases. Of these, 76 were reported as not vaccinated, 11 received one dose of vaccine, five received two doses of vaccine, 116 received three or more doses (including 25 who had received all five doses), and 50 were reported as being vaccinated but no dose information was available. Of the cases where the relevant information was recorded, 45.3% (145/320) attended school, pre-school or childcare, and 34.4% (67/195) had contact with a laboratory-confirmed pertussis case. Two Bordetella pertussis outbreaks involving four cases were reported in July.   

·    Rheumatic fever: Based on the earliest date available, 22 cases of rheumatic fever (21 initial and 1 recurrent attacks) were notified in July 2012, compared to eight cases during the same month of last year. Of the 21 cases with hospitalisation status recorded, all were hospitalised. All of the cases were notified from the North Island with the highest number of cases notified from Counties Manukau (12) DHB. Cases were reported among Māori (10 cases), Pacific Peoples (9 cases), and European (2 cases) ethnic groups. Ethnicity was not reported for the remaining case. The majority of cases (17 cases) were aged between 5 and 19 years.

·    Salmonellosis: 71 cases of salmonellosis were notified in July 2012, compared with 52 cases notified in the previous month and 57 cases in the same month of the previous year. The highest number of cases was reported in the Auckland region (31 cases). The cases ranged in age from nine months to 80 years, with the highest number of cases in the 20-29 years (14 cases) and in the 40-49 years (10 cases) age groups. Five cases were hospitalised. The serotype involved was recorded for 62 (87.3%) cases. The most common serotypes were: Salmonella Typhimurium phage type RDNC-May06 (5 cases), S. Enteritidis phage type 11, S. Weltevreden (4 cases each), and S. Enteritidis phage type 21 and S. Stanley (3 cases each). Two Salmonella outbreaks involving six cases were reported in July.

·    Shigellosis: 15 cases of shigellosis were notified in July 2012 compared with 10 cases notified in the previous month and seven cases in the same month of the previous year. Cases were from the following DHBs: Waitemata and Auckland (4 cases each), Counties Manukau and Taranaki (2 cases each), and Waikato, MidCentral and Capital and Coast (1 case each). The serotype involved was recorded for 11 cases: Shigella sonnei biotype g (5), S. sonnei biotype a (4), S. flexneri and S. flexneri 2b (1 case each). Overseas travel during the incubation period was recorded for six cases. Countries visited included Vanuatu (3 cases), Mexico, Samoa and Thailand (1 case each). One Shigella outbreak involving two cases was reported in July.

·    VTEC/STEC infection: Nine cases of VTEC/STEC infection were notified in July 2012, compared to three cases notified in the same month of the previous year (Figure 2). Cases were from the following DHBs: Waikato, Taranaki and Canterbury (2 cases each), and Northland, Waitemata and Counties Manukau (1 case each). The highest number of cases occurred in the 1-4 years age group (5 cases). Four cases were hospitalised. The serotype was recorded for six cases: Escherichia coli O157:H7 (5 cases) and E. coli O26:H11 (1 case). Among the cases for which risk factor information was recorded, 100.0% (6/6) cases had contact with animals, and 66.7% (4/6) had recreational contact with water.

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Report:

Monthly Notifiable Disease Surveillance Report - Jul 2012

Tables:

Monthly National Totals - Jul 2012

Monthly DHB Totals - Jul 2012

Monthly Rolling Totals - Jul 2012

 

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Monthly Notifiable Disease Surveillance Report - Jul 2012

Tables:

Monthly National Totals - Jul 2012

Monthly DHB Totals - Jul 2012

Monthly Rolling Totals - Jul 2012

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