Changes to the data
Data tables produced by the website may sometimes change. The most likely reason is that the breakpoints have changed, and therefore the percentage susceptible/intermediate/resistant has changed. Check the breakpoints link to see what breakpoints have been used at different times – they change at least annually.
Occasionally, we also need to make corrections to the data. A list of these changes can be seen below. If you are concerned about an apparent change, you can contact the Resistance Surveillance Co-ordinator. Please say which organism, season and summary you are asking about, and which antibiotics are involved.