Polynesian rat
THAIV was first isolated from rodents in two Thai provinces, Nakhon Pathom Province and Nakhon Ratchasima Province, in 1994. The greater bandicoot rat ("Bandicota indica") was found to be the primary reservoir for THAIV. Serological studies have revealed, but not confirmed, other rodents in Thailand as possible reservoirs, including the black rat ("Rattus rattus"), Polynesian rat ("R. exulans"), brown rat ("R. norvegicus") and lesser rice-field rat ("R. losea").