Pathogenic Leptospira Species in Bats: Molecular Detection in a Colombian Cave.

Abstract

Leptospirosis is caused by pathogenic Leptospira spp., which can be found in nature among domestic and wild animals. In Colombia, the Macaregua cave is known for its bat richness; thus, because bats are reservoir hosts of human microbiological pathogens, we determined if the Macaregua cave bats harbored Leptospira in the wild. A total of 85 kidney samples were collected from three bat species (Carollia perspicillata, Mormoops megalophylla, and Natalus tumidirostris) to detect Leptospira spp. The 16S rRNA gene was targeted through conventional PCR and qPCR; in addition, the LipL32 gene was detected using conventional PCR. Obtained amplicons were purified and sequenced for phylogenetic analysis. The Leptospira spp. 16S rRNA gene was detected in 51.8% bat kidneys, of which 35 sequences were obtained, all clustering within the pathogenic group. Moreover, 11 sequences presented high-identity-values with Leptospira noguchii, Leptospira alexanderi, Leptospira borgpetersenii, Leptospira kirschneri, and Leptospira mayottensis. From the 16S rRNA Leptospira spp.-positive population samples, 28 amplified for the LipL32 gene, and 23 sequences clustered in five different phylogenetic groups. In conclusion, we detected the circulation of different groups of Leptospira spp. sequences among cave bats in the wild; some sequences were detected in more than one bat specimen from the same species, suggesting a conspecific transmission within the cave.