Volume 4, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



A serologic study of twenty leptospiral isolates from Malaya, North Borneo and Thailand is reported. Initial serologic typing of these strains by means of the cross agglutination-lysis reactions revealed the presence of seven distinct antigenic leptospiral types. Subsequent antigenic analysis of representative strains indicated the presence in Malaya of , Salinem (4 human), (1 human), and an “incomplete” biotype of (2 human, 3 rodent), a “complete” biotype of (1 rodent), (1 rodent) and a new serotype strain (1 human). In addition was isolated from trapped in North Borneo, and AB was isolated from the six members of the rodent genus , trapped in Thailand.

Classification of the leptospiral isolates based on a modified adoption of the proposed scheme of Wolff and Broom (1954) disclosed the presence of three hitherto undescribed antigenic types, a new serotype designated as , an “incomplete” biotype of , designated as A, and a “complete” biotype of designated as AB.

The results of agglutinin absorption studies with the members of the , and serogroups were consistent with the findings of other investigators on the inter-relationships among the serotype members of these respective groups.


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