The first molecular characterization of Sarcocystis cameli in the Indian dromedary camels (Camelus dromedarius).

In the present study, tissue samples (tongue, esophagus and heart) were investigated from dromedary camels of India for identification and characterization of Sarcocystis spp. using histopathology, PCR and gene sequencing. Genomic DNA extracted from these tissue samples was used for PCR amplification of the cytochrome c oxidase subunit I gene (cox1) of Sarcocystis spp. and the partial sequence of small subunit ribosomal RNA (18S rRNA) gene of the S. cameli. The PCR products were purified, sequenced and analyzed using bioinformatics tools. Based on phylogenetic analysis of the cox1 gene, the sequences of the present study clustered with those of S. cameli, hosted by dromedary camels of Iraq and a close association was observed with S. masoni hosted by dogs and alpacas of China. Until now, there are no 18S rRNA sequences of S. cameli available in GenBank and this is the first study recording 18S rRNA sequences of S. cameli which were grouped with S. masoni from alpaca of China and guanaco and llama of Argentina in phylogenetic analysis. These findings could be useful for further studies on the characterization through molecular epidemiology, genetic diversity and host specificity of S. cameli.