Volume 82, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Rats are known to be the most important reservoirs and transmission sources of leptospirosis. However, the status of leptospirosis in the Philippines regarding reservoirs and transmission remains unknown. A survey was conducted in Metro Manila and Laguna that analyzed samples obtained from 106 rats. Using the microscopic agglutination test, we found that 92% of rat serum samples were positive for anti- antibodies; the most common infecting serovars were Manilae, Hebdomadis, and Losbanos. On the basis of pulsed-field gel electrophoresis and gyrase B gene sequence analyses, four groups of rat kidney isolates were found: serovar Manilae, serovar Losbanos, and serogroup Grippotyphosa, and serogroup Javanica. Most isolates were lethal after experimental infection of golden Syrian hamsters. Results showed that these four serovars and serogroups are circulating among rats, and that these animals may be one of the possible transmission sources of leptospirosis in the Philippines.


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  • Received : 30 Nov 2009
  • Accepted : 19 Jan 2010
  • Published online : 05 May 2010

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