When the switch of a flashlight is pushed into the ON position, it makes contact between two contact strips, which begin a flow of electricity, powered from the battery. The batteries are connected in such a way that electricity (flow of electrons) runs between the positive and negative electrodes of the battery.
Shigella infection (shigellosis) is an intestinal disease caused by a family of bacteria known as shigella. The main sign of shigella infection is diarrhea, which often is bloody. Shigella can be passed through direct contact with the bacteria in the stool.
A term applied to various intestinal disorders; especially, of the colon, marked by inflammation of the mucous membrane. It is characterized by abdominal pain and diarrhea with passage of mucus or blood. The cause is bacterial or viral infection, infestation by protozoa or parasitic worms, or chemical irritants.