Much of how "B. dendrobatidis" is successfully transmitted from one host to the next is largely unknown. Once released into the aquatic environment, zoospores travel less than 2 cm within 24 hours before they encyst. The limited range of "B. dendrobatidis" zoospores suggest some unknown mechanism exists by which they transmit from one host to the next, which can involve the pet trade, and especially the American bullfrog. Abiotic factors such as temperature, pH level, and nutrient levels affect the success of "B. dendrobatidis" zoospores. The fungus zoospores can survive within a temperature range of 4–25 °C and a pH range of 6–7.