In Alien Swarm, is there an easier way to get rid of infestation/parasites other than massive healing?

Healing seems to be the only way, but there are some methods that can help avoid infestation or - if you got infested after all - get enough healing in time:

1. Area-of-effect weapons such as the flamers or tesla cannon seem to work pretty well against those face-huggers, as do tracking weapons.
2. If you repeatedly get infested during a specific mission, consider taking a self-healing pack with you.
3. Have somebody in the group carry adrenaline. When anyone get infested use the adrenaline to allow the medic and the infested enough time to rendezvous - that way there will also be less demand for healing.

You can remove infestations by using the electric armor item. Its often a good idea for the "point" soldier to have this equipped during heavy infestation runs, but if you're having trouble in general having everyone equip it can significantly reduce the pain of swarm parasites.

Note though, that the best way to manage infestation is to not get infested in the first place! Flamers and Tesla guns work well.

Something else to note: The healing beacon has two limits:

1. How much it can heal total.
2. How much it can heal per second.

If all 4 marines are damaged and in the healing field, they will all regain health, but 1/4th the speed of a single damaged marine.

Same for infestations. If you have an infested player, he should be the only one in the healing field to make sure hes gets healed as quickly as possible.