Even though many authorities recognize Asian Elephant subspecies, AZA still doesn't so many subspecies of Asian Elephants may have and mabye still are being phased-in to the U.S. I'm pretty most Asian Elephants in the U.S. (the ones born here at least) are just as pure as our Amur Leopards or mabye a little less but many zoos, like the Bronx, hold Indian Elephants. The Smithsonian National Zoo told me they have 0.1 Indian Elephants and 0.2 Sri Lankan Elephants and the Oregon Zoo has an elephant named Chendra which came from Shabah to breed and is a Bornean Pygmy Elephant. I find it rediculous that they're breeding the countries largest bull Asian Elephant with a little female Bornean Pygmy but that's what they're doing and since it's not working through normal breeding, they're trying AI.
Here's the thread about it.
http://www.zoochat.com/22/pygmy-not-25610/