Monthly Notifiable Disease Surveillance Report - Nov 2012

Monday 23rd September 2019


Key notifiable disease trends

·    Cryptosporidiosis: 96 cases of cryptosporidiosis were notified in November 2012 compared to 87 cases notified during the same month of the previous year (Figure 1). The cases ranged in age from 13 months to 82 years, with the highest numbers of cases in the 1-4 years (30 cases) and in the 5-9 years (14 cases) age groups. The highest numbers of cases were reported in Southern (33 cases), Waikato (14 cases), and Counties Manukau and Hawke’s Bay (7 cases each) DHBs. Among the cases where risk factor information was recorded, 62.3% (33/53) had contact with farm animals, 51.1% (23/45) had consumed untreated water, and 47.2% (25/53) had attended school, preschool or childcare. Five Cryptosporidium outbreaks involving 10 cases in total were reported in November.

·    Legionellosis: 26 cases of legionellosis were notified in November 2012 (11 confirmed, 5 probable and 10 under investigation), compared to 17 cases notified in the same month of the previous year. The following section relates to the 11 confirmed cases only. These cases were reported in Canterbury (7 cases), and Counties Manukau, Lakes, MidCentral and Nelson Marlborough (1 case each) DHBs. The cases ranged in age from 33 years to 75 years, with the highest numbers of  cases in the 30-39 years and 60-69 years (3 cases each) age groups. Eight hospitalisations were reported. Among the cases where risk information was recorded, seven reported exposure to environmental sources of infection (six cases reported exposure to compost/potting mix, and one to a possible contaminated water supply). The Legionella species was identified in six cases: Legionella longbeachae sg1, L. longbeachae sg2, L. pneumophila sg2, L. pneumophila sg12, L. jordanis and L. bozemanae or L. longbeachae (1 case each).

·    Paralytic shellfish poisoning: One suspect case of paralytic shellfish poisoning was notified in November 2012. The case was a female in the 60-69 years age group from Waikato DHB. The case had consumed scallops harvested recreationally in the region.

·    Pertussis: 609 cases of pertussis were notified in November 2012, compared with 543 cases notified the previous month and 469 cases in the same month of the previous year (Figure 2). Thirty-five cases were hospitalised and one death was reported in an infant aged less than 6 weeks with a history of premature birth. There were 134 (22.0%) cases laboratory-confirmed by isolation of Bordetella pertussis from the nasopharynx. A further 176 (28.9%) cases were laboratory-confirmed by PCR. The highest number of cases was from Canterbury DHB (127), followed by Capital and Coast (52) and Counties Manukau (48) DHBs. The cases ranged in age from 26 days to 88 years, with 19.1% (116/608 cases with a known age) under 5 years old (including 43 cases aged less than 1 year). The highest numbers of cases occurred in the 40-49 years (88), 30-39 years (82), 5-9 years (78), and 1-4 years (73) age groups. The vaccination status was recorded for 309 (50.7%) cases. Of these, 118 were reported as not vaccinated, 20 received one dose of vaccine, 11 received two doses of vaccine, 110 received three or more doses (including 21 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, 39.8% (153/384) attended school, pre-school or childcare, and 35.8% (97/271) had contact with a laboratory-confirmed pertussis case. Two B. pertussis outbreaks involving four cases in total were reported in November.

·    Rickettsial disease: One confirmed case of rickettsial spotted fever was notified in November 2012. The case was a female in the 60-69 years age group from Waitemata DHB. The case had been in Australia during the incubation period.

·    Salmonellosis: 102 cases of salmonellosis were notified in November 2012, compared with 91 cases notified in the previous month and 72 cases in the same month of the previous year.  The highest number of cases was reported in the Auckland region (36 cases), followed by Southern DHB (13 cases). The cases ranged in age from 12 days to 84 years, with the highest number of cases in the 20-29 years (17) and in the 40-49 years and the 50-59 years (14 cases each) age groups. Fifteen cases were hospitalised. The serotype involved was recorded for 88 (86.3%) cases. The most common serotypes were: Salmonella Montevideo (12 cases), S. Typhimurium phage type RDNC-May06 (8 cases), and S. Brandenburg (5 cases). Two Salmonella outbreaks involving six cases in total were reported in November.

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Report:

Monthly Notifiable Disease Surveillance Report - Nov 2012

Tables:

Monthly National Totals - Nov 2012

Monthly DHB Totals - Nov 2012

Monthly Rolling Totals - Nov 2012

 

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Monthly Notifiable Disease Surveillance Report - Nov 2012

Tables:

Monthly National Totals - Nov 2012

Monthly DHB Totals - Nov 2012

Monthly Rolling Totals - Nov 2012

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