RT Book, Section A1 García, HéCtor H. A1 Santivañez, Saul A1 Gilman, Robert H. A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 7031339 T1 Chapter 338. Echinococcosis T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=7031339 RD 2024/04/19 AB Five species of Echinococcus have been recognized to date. Echinococcus granulosus, E multilocularis, and more rarely E vogeli and E oligarthrus infect humans with their larval stages. The definitive hosts are canids, except for E oligarthrus, which includes wild felids as intermediate hosts. Humans become accidental intermediate hosts when the eggs from the feces of dogs, wolves, or other canids are ingested. A fifth species, E. shiquicus, has been recently recognized, but it is not known whether it may infect humans.1,2