Table 1. Risks associated with shipping of Schistosoma mansoni parasites and Biomphalaria glabrata snails.

Risk	Inherent risk score		Total inherent risk	Controls	Residual risk score		Total risk post control
	Likelihood	Impact			Likelihood	Impact
Death of snails in transport	Likely	Critical	20	Pilot transport with low numbers of snails to optimize transport conditions	Possible	Critical	15
Delays in customs clearance	Likely	Major	16	Contacting customs officials to discuss required documentations and preparing documents prior to shipment	Possible	Major	12
Spill of infectious materials and non- indigenous snail species	Possible	Major	12	Proper packaging	Unlikely	Moderate	6
Establishment of a B. glabrata colony outside laboratory facility	Possible	Critical	15	Proper packaging	Rare	Critical	5

Likelihood was scored as almost certain/common, 5; likely, 4; possible, 3; unlikely, 2; rare, 1. Impact was scored as critical, 5; major, 4; moderate, 3; minor, 2; insignificant 1.