Monthly Notifiable Disease Surveillance Report - May 2022

Friday 2nd December 2022


Key Notifiable Disease Trends

COVID-19: There were 231,886 cases of COVID-19 notified in May 2022. More information on COVID-19 cases can be found on the Ministry of Health website.

Enteric fever: There were five confirmed cases of enteric fever (two typhoid fever and three paratyphoid fever) notified in May 2022, compared with no cases for the same month in 2021. All five cases were hospitalised. The cases were all in India during the incubation period.

Legionellosis: There were 23 cases of legionellosis (19 confirmed and 4 under investigation) notified in May 2022, compared with 11 cases for the same month in 2021. Of the 19 confirmed cases, 14 were due to Legionella pneumophila which is associated with warm water systems, and five were due to L. longbeachae which is associated with compost and potting mix.

Leptospirosis: There were 12 cases of leptospirosis (9 confirmed and 3 under investigation) notified in May 2022, compared with seven cases for the same month in 2021. The nine confirmed cases ranged in age from 25 to 70 years, eight were male and one was female. Seven confirmed cases reported exposure to animals (four due to the nature of their occupation as farmers) and four had contact with rural streams, rivers or lakes. Hospitalisation was recorded for seven of the confirmed cases, of which six (85.7%) were hospitalised. The serovar was identified for four confirmed cases; two were Leptospira Hardjo, one was L. Ballum and one was L Copenhageni.

OUTBREAKS

Respiratory illness: There were eight respiratory illness outbreaks reported in May 2022. Five outbreaks were due to COVID-19, two were influenza-like illness (influenza A was identified in one) and one was acute respiratory infection. Four outbreaks were in long-term care facilities, two were in schools, one was in an early childcare centre and one in a hospital.

Ongoing outbreaks:

There were four cases of gastroenteritis due to Vibrio parahaemolyticus infection notified in May 2022, bringing the total in the outbreak since 15 November 2021 to 63 cases. The outbreak has been associated with consumption of oysters, mussels, shellfish, fish and kina.

Three cases of Salmonella Enteritidis sequence type 11 were identified as belonging to the Enteritidis_2019_C_01 cluster in May, bringing the total in the outbreak since January 2021 to 62 cases. The outbreak has been linked to poultry and eggs.

Note: Click on the document links below to open. These documents are in PDF format. You will need to download the free Adobe Acrobat Reader to view them.

Report:

Monthly Notifiable Disease Surveillance Report - May 2022

Tables:

Monthly National Tables - May 2022 (.xlsx)

Monthly DHB Tables - May 2022 (.xlsx)

Monthly Rolling Tables - May 2022 (.xlsx)

 

DOWNLOADS

Monthly Notifiable Disease Surveillance Report - May 2022

Tables:

Monthly National Tables - May 2022 (.xlsx)

Monthly DHB Tables - May 2022 (.xlsx)

Monthly Rolling Tables - May 2022 (.xlsx)

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