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DNA relatedness of Leptospira strains isolated from beef cattle in Zimbabwe

¹ Department of Biological Sciences, University of Zimbabwe, MP 167, Mount Pleasant, Harare, Zimbabwe
² Meningitis and Special Pathogens Branch, Division of Bacterial and Mycotic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA

Author for corresondence: Sara B. Feresu. Tel: +263 4 303211. Fax: +263 4 333407. e-mail: sferesu{at}esanet.zw or feresu{at}compcentre.uz.ac.zw

ABSTRACT

The DNA relatedness of 17 Leptospira strains isolated from beef cattle in Zimbabwe was determined using the hydroxyapatite method. Similarly to previously speciated African strains, all Zimbabwe isolates belonged to either Leptospira borgpetersenii or Leptospira kirschneri. All serovars within serogroups Pyrogenes (kwale, mombe and a strain closely related to serovar nigeria), Hebdomadis (marondera and mhou), Tarassovi (ngavi) and Sejroe (balcanica and hardjo) were L. borgpetersenii. L. kirschneri contained all stra in serovars of serogroups Icterohaemorrhagiae (zimbabwe), Australis (fugis) Bataviae (paidjan) and Pomona (a strain closely related to mozdok). The species designations of the Zimbabwe fugis and paidjan strains were differe from those of the reference strains of these two serovars, both of which belong to Leptospira interrogans.

Key Words: DNA relatedness • Leptospira borgpetersenii • Leptospira kirschneri

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