We were given the Army first aid manual when I signed up for SAR - irrigating wounds with clean water is SOP. But, if it's tick removal or similar, you can bet I'm getting out the disinfectant swab. Alcohol kills the bacteria, but it's also destructive to tissue, so I'll save it for wounds with a higher probable negative outcome. The last gouge on the hand healed up cleanly after being irrigated, dosed with triple antibiotic cream, and wrapped. The last tick bite got infected despite removal by medical personnel - grrrr.