Monthly Notifiable Disease Surveillance Report - Apr 2013

Saturday 21st September 2019


Key notifiable disease trends

Cryptosporidiosis: 127 cases of cryptosporidiosis were notified in April 2013 compared to 46 cases notified during the same month of the previous year. The cases ranged in age from five months to 81 years, with the highest numbers of cases in the 1-4 years (50 cases) followed by those in the 30-39 years (18 cases), and 5-9 years (17 cases) age groups. The highest numbers of cases were reported from Waikato (24 cases), Capital and Coast (21 cases), and Hutt Valley (15 cases) DHBs. Among the cases where risk factor information was recorded, 57.5% (46/80) had recreational contact with water, 49.4% (38/77) had contact with other symptomatic people, 36.0% (31/86) attended school, pre-school or childcare, 30.8% (24/78) had consumed food from a food premises and 25.9% (21/81) had contact with farm animals.  Nine Cryptosporidium outbreaks were reported in April, including eight finalised outbreaks (26 cases) and one interim outbreak (case number yet to be determined).

Hepatitis A: 18 cases of hepatitis A were notified in April 2013 compared to four cases in the same month of the previous year. Ethnicity was recorded for all cases with the highest numbers of cases in Pacific Peoples (11 cases), followed by Māori (5 cases) and European (2 cases) ethnic groups. Cases were predominantly from Canterbury DHB (88.9%, 16/18 cases). The cases ranged in age from 15 months to 42 years, with the highest numbers of cases in the 1-4 years and 5-9 years (6 cases each) age groups. Five of the cases had travelled overseas during the incubation period all of whom visited Samoa. One hepatitis A outbreak involving 12 cases was reported in April.

Mumps: 6 cases of mumps (4 probable and 2 under investigation) were notified in April 2013 compared to one case in the same month of the previous year. Cases were from the following DHBs: Northland, Bay of Plenty, Hutt Valley, Capital and Coast, Nelson Marlborough, and Southern (1 case each). The cases ranged in age from three years to 27 years, with the majority of cases in the 5-9 years (3 cases) age group. Ethnicity was recorded for all cases as follows Māori (3 cases), European (2 cases) and Asian (1 case) ethnic groups. Of the five cases where vaccination status was recorded, all five cases had been vaccinated against mumps with three cases having only received one dose of vaccine, and two cases having received two doses of vaccine.

Rheumatic fever: Based on the earliest date available, 17 cases of rheumatic fever (16 initial attack, 1 recurrent attack) were notified in April 2013, compared to 11 cases during the same month of the previous year. Of the 13 cases with hospitalisation status recorded, all were hospitalised. All cases except for one were notified from the North Island with the highest number of cases notified from Counties Manukau DHB (9 cases). Ethnicity was reported for all but two cases with the highest number of cases in the Pacific Peoples (11 cases) ethnic group. The majority of cases (9 cases) were aged between 5 and 14 years.

Rickettsial disease:  One case of rickettsial disease was notified in April 2013. The case was a female in the 1-4 years age group from Capital and Coast DHB and was in Australia during the incubation period. A tick that was removed from the child is undergoing testing. Serology test results are still pending for the child .

Salmonellosis: 108 cases of salmonellosis were notified in April 2013 compared to 81 cases notified in the same month of the previous year (Figure 1). The highest number of cases was reported from the Auckland region (31 cases), followed by Southern (22 cases) and Canterbury (13 cases) DHBs. The cases ranged in age from three months to 76 years, with the highest number of cases in the 1-4 years age group (21 cases) followed by those in the 20-29 years and 40-49 years (18 cases each), and 60-69 years (12 cases) age groups. Thirteen cases were hospitalised. The serotype involved was recorded for 102 (94.4%) cases. The most common serotypes were: Salmonella Infantis (14 cases), S. Typhimurium phage type 160 (10 cases), and S. Mississippi (9 cases). One Salmonella interim outbreak involving three cases was reported in April.

VTEC/STEC infection: 47 cases of VTEC/STEC infection were notified in April 2013, one of these cases has since been made ‘not a case’ after further investigation. This compares with cases notified in the same month of the previous year (Figure 2). The highest number of cases was reported from Waikato (15 cases), Counties Manukau (7 cases), Waitemata and Auckland (5 cases each), and Canterbury (3 cases) DHBs. The highest number of cases occurred in the 1-4 years age group (13 cases). Fourteen cases were hospitalised of which one had haemolytic uraemic syndrome. The serotype/organism was identified by the Enteric Reference Laboratory for 44 cases all of which were Escherichia coli O157:H7. Among the cases for whom risk factor was recorded, 69.2% (18/26) had contact with animals, 42.1% (8/19) had consumed water from a non-habitual supply and 30.8% (8/26) had attended school, pre-school or childcare. Four E. coli O157:H7 outbreaks were reported in April, including three finalised outbreaks (16 cases) and one interim outbreak (4 cases).

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Report:

Monthly Notifiable Disease Surveillance Report - Apr 2013

Tables:

Monthly National Totals - Apr 2013

Monthly DHB Totals - Apr 2013

Monthly Rolling Totals - Apr 2013

 

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Monthly Notifiable Disease Surveillance Report - Apr 2013

Tables:

Monthly National Totals - Apr 2013

Monthly DHB Totals - Apr 2013

Monthly Rolling Totals - Apr 2013

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