Abstract
This study aimed to identify and characterize genetically species of the genus Hepatozoon detected in Hydrochoerus hydrochaeris (capybaras) and Pecari tajacu (collared peccaries) from two localities from the Eastern Amazon. Blood samples from 196 free-living H. hydrochaeris from Marajó Island and 109 P. tajacu kept in captivity in Belém, Pará, were collected and analyzed for the presence of Hepatozoon spp. Partial sequences of the 18S rRNA gene were obtained and analyzed in comparison to others available in the NCBI database. Our results demonstrated a high prevalence of Hepatozoon canis in both mammals and the existence of four haplotypes of Hepatozoon spp., three of Hepatozoon canis and one of Hepatozoon cuestensis, found only in H. hydrochaeris. In addition, these data increase the genetic diversity of H. canis from the Eastern Amazon, as well as reporting, for the first time, the infection of mammals by H. cuestensis and P. tajacu by H. canis.
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