VTEC Isolates 2018

Wednesday 22nd March 2023


VTEC/STEC confirmations continue to increase as another two laboratories commenced culture independent testing for this organism in January and November 2018. Thus more than 75% of clinical samples in New Zealand are now being screened routinely for stx genes.

The 10 most common STEC O types confirmed in 2018 were: O157, O26, O128, O146, O38, O123/186, O103, O174, O176, and O91.

Note: the USA "Top 7" serotypes only include O157, O26 and O103 from NZ's top 10. However, some of NZ's common types are being regularly seen elsewhere in the world.

stx2+ STEC O26 continues to emerge as a significant pathotype with 15 isolates confirmed in 2018.

The number of samples from which an organism has not been able to be isolated is similar to 2017, and, comprehensive typing is not currently possible without a pure culture isolate. Work to improve organism isolation is ongoing and the upcoming introduction of routine WGS will add to our understanding of this group of organisms.

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.


VTEC Isolates 2018



VTEC Isolates 2018

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