The origin of BD is not fully understood, neither is its transmission around the globe. One thing is for sure though, that humans have only made the problem worse. Transporting frogs around the world, for research or as pets has helped BD establish residence all over the globe.
3 genetically different lineages are found known:
- From Switzerland – BD-CH
- From Mallorca (originally from South Africa) – BD-CAPE
- All over the world – Global Panzootic Lineage – BD-GPL
BD-GPL is extremely aggressive and kills the Amphibians much more quickly compared to the others. It occurred as a result of mixing of a previously geographically isolated populations, all as a result of human frog trade.
Amphibian Chytridiomycosis 