Better health and ageing for all Australians

Australian national notifiable diseases case definitions

Leptospirosis case definition

This document contains the case definitions for Leptospirosis which is nationally notifiable within Australia. This definition should be used to determine whether a case should be notified.

Communicable Diseases Surveillance

Australian national notifiable diseases case definitions - Leptospirosis

Reporting

Only confirmed cases should be notified.

Confirmed case

A confirmed case requires laboratory definitive evidence only.

Laboratory definitive evidence

1. Isolation of pathogenic Leptospira species

OR

2. A fourfold or greater rise in Leptospira agglutination titre between acute and convalescent phase sera obtained at least two weeks apart and preferably conducted at the same laboratory

OR

3. A single Leptospira micro agglutination titre greater than or equal to 400 supported by a positive enzyme-linked immunosorbent assay IgM result.


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