Maximum-likelihood tree for DNA sequences of the Leptospira spp. rrs gene recovered from serum samples from febrile humans and from urine and kidney samples from animal carriers in Ecuador. Esmeraldas, Portoviejo, and Guayaquil are 3 rural, semiurban, and urban communities, respectively, along the coast of Ecuador. Pathogenic L. borgpetersenii was used as an outgroup. Numbers in parentheses indicate the percentage of samples per community that contained DNA signatures highly similar to GenBank reference strains L. wolffii (NR_044042), L. inadai (accession no. JQ988844.1), and L. borgpetersenii (accession no. JQ988861.1). Scale bar indicates the degree of nucleotide substitutions.