title: Isolation and Identification of a Leptospire of The Hebdomadis Serogroup (L. Hardjo) From Cattle in Canada.
abstract: During the summer of 1961 an outbreak of atypical mastitis in a small herd of dairy cattle was investigated. The clinical findings, which included a single abortion, were suggestive of leptospirosis and serological studies indicated that a serotype other than the usual L. pomona was the causative agent. A fastidious leptospire recovered from the urine of one cow has been identified as L. hardjo, a member of the hebdomadis group. The difficulties encountered in isolation, adaptation to standard media and serotyping are described.
authors.forename: A
authors.initials: A
authors.lastname: Robertson
authors.forename: P
authors.initials: P
authors.lastname: Boulanger
authors.forename: D
authors.initials: D
authors.lastname: Mitchell