ɪt hɐz ˈoʊnli bˌɪn sˈiːn ɪn mˈaʊs kˈɑːləniz kˈɛpt fɔːɹ ɹᵻsˈɜːtʃ pˈɜːpəsᵻz bˌʌt bᵻlˈiːvd ðæt wˈaɪld pˌɑːpjʊlˈeɪʃənz ʌv mˈaɪs ænd ˈʌðɚ ɹˈoʊdənts ɪn jˈʊɹɹəp ɑːɹ nˈætʃɚɹəli ɪnfˈɛktᵻd wɪð ˈɛktiːvˌiː.
It has only been seen in mouse colonies kept for research purposes but believed that wild populations of mice and other rodents in Europe are naturally infected with ECTV.