Shigella sonnei (the most common species in the U.S.) Shigella flexneri; Shigella boydii; Shigella dysenteriae; The transmission of most Shigella infections is caused by the bacterium passing from stools or soiled fingers of one person to
System maintenance. One advantage of the septic tank/absorption field system is that it has no moving parts, but it does require maintenance. Annual inspections of your septic system are recommended to ensure that it is working properly and to determine when scum and sludge in the septic tank should be cleaned out.
Septic Leach Field Doâs and Donâts. 1  Know where your field is located so it is easier to protect from trees or runoff. 2  Keep heavy equipment off your field. 3  Minimize water use or surges.  Divert downspouts away from 1  field. Do not plant trees on or around your field.