Quote:
Originally Posted by
Milpool 
Sawyer extractor is a handy little item.
The evidence that it actually works against snake bites doesn't look that good:
Suction for venomous snakebite*1: A study of "mock venom" extraction in a human model
Annals of Emergency Medicine
Volume 43, Issue 2, February 2004, Pages 181-186
Study objective
We determine the percentage of mock venom recovered by a suction device (Sawyer Extractor pump) in a simulated snakebite in human volunteers.
Methods
A mock venom (1 mL normal saline solution, 5.0 mg albumin, 2.5 mg aggregated albumin) radioactively labeled with 1 mCi of technetium was injected with a curved 16-gauge hypodermic needle 1 cm into the right lateral lower leg of 8 supine male volunteers aged 28 to 51 years. The Sawyer Extractor pump was applied after a 3-minute delay, and the blood removed by suction was collected after an additional 15 minutes. A 1991 Siemens Diacam was used to take measurements of the radioactive counts extracted and those remaining in the leg and body.
Results
The "envenomation load," as measured by mean radioactivity in the leg after injection, was 89,895 counts/min. The mean radioactivity found in the blood extracted in the 15 minutes of suction was 38.5 counts/min (95% confidence interval [CI] −33 to 110 counts/min), representing 0.04% of the envenomation load. The postextraction leg count was less than the envenomation load by 1,832 counts/min (95% CI −3,863 to 200 counts/min), representing a 2.0% decrease in the total body venom load.
Conclusion
The Sawyer Extractor pump removed bloody fluid from our simulated snakebite wounds but removed virtually no mock venom, which suggests that suction is unlikely to be an effective treatment for reducing the total body venom burden after a venomous snakebite.
----------------------------------------------------------------------------------------------------------------------------
If you decide to carry any guns, make sure you know the local laws concerning carrying and be well trained in their use + know how to keep them in proper working order. I didn't feel the need to carry and most of my translators didn't while I was with them. But the area I was working in was fairly safe in terms of animals (besides snakes) and I didn't go looking for trouble from people.
However, I did know one guy who carried a rifle because he liked to hunt.