insert swarm question

[papakee]

Does an insect swarm's venom have an associated effect every round or is it just cummulative? For example: if Joe Adventurer takes bee 10 stings in round 1 and 5 bee stings in round 2, does he (1d10 rounds later) take one resilience roll against Potency 75 poison or 2 resilience rolls (1 against Potency 50 and 1 against Potency 25)? Option 1, gives a greater chance to take damage/effects, option 2 has a lower chance but potential for more damage.

Thanks, Tim