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Background    Echinococcus granulosus  ( sensu lato ) ( s.l .) and  Echinococcus vogeli  are causative agents of chronic zoonotic diseases such as cystic and polycystic echinococcosis, respectively. In Brazil, polycystic echinococcosis has a restricted geographical distribution in the North Region, while cystic echinococcosis is observed in the South Region. Domestic dogs ( Canis familiaris ) fed with raw viscera represent a risk factor for  E. granulosus  ( s.l .) infection in the South Region. Although this practice is frequent, it remains unclear whether domestic dogs are infected with  E. vogeli  in the state of Acre, located in the Amazon basin in the North Region of Brazil. The aim of this study was to investigate this gap in the polycystic echinococcosis epidemiology.    Methods  Sixty-five fecal samples were collected from the ground in five municipalities (Sena Madureira,  n  = 14; Rio Branco,  n  = 06; Bujari,  n  = 06; Xapuri,  n  = 30; and Epitaciolândia,  n  = 09) located in the state of Acre, northern Brazil. The samples were screened for parasites by copro-PCR using the  cox 1 gene associated with automated sequencing.    Results    Echinococcus vogeli  was molecularly confirmed in a sample from Sena Madureira and  E. granulosus  ( sensu  stricto) ( s.s .) (G1) in a sample from Rio Branco.    Conclusions  These findings indicate that molecular assays are useful in typing  Echinococcus  taxa from fecal samples of dogs in northern Brazil. The present study is the first molecular record of  E. vogeli  in domestic dogs found in the state of Acre, reinforcing their role as a source of infection for humans. Because  E. granulosus  ( s.s .) (G1) was detected for the first time in the North Region, from the epidemiological standpoint this finding is highly relevant, because it expands the known geographical distribution, which was previously restricted to the South Region of Brazil.

parasites and vectors

First molecular identification of Echinococcus vogeli and Echinococcus granulosus (sensu stricto) G1 revealed in feces of domestic dogs (Canis familiaris) from Acre, Brazil