37 reactions · 15 shares | The major source of giardiasis is waterborne transmission, including via fresh-appearing mountain streams and poorly filtered municipal water supplies. Watch this video, and click to learn more: https://mrkmnls.co/3R1tFJK | The Merck Veterinary Manual | Facebook

64 reactions · 23 shares | Giardia cysts are immediately infective when passed in the feces and survive well in the environment, particularly in damp and cool conditions in which cysts may stay infective for months. Watch this video, and click to learn more: https://mrkmnls.co/3R1tFJK | The Merck Veterinary Manual | Facebook