Water strains of Leptospira in the serodiagnosis of human and animal leptospirosis.

The most widely used serological reaction for the diagnosis of leptospirosis is the agglutination test. This test, however, cannot be carried out in many laboratories because special equipment and special experience are required. It is also necessary to maintain live Leptospira cultures belonging to all the serotypes present in the country where the test is made.