Bacteria are harmful
Bacteria may also cause sepsis in untreated wounds and cuts. If left untreated, these infections can lead to loss of limbs and even death.
Many forms of bacteria are found in untreated water which can result in severe harm to the human digestive tract and its local flora. Ingestion of these strains of bacteria may lead to flu-like symptoms, including diarrhea, vomiting and stomach cramps.
There are several strains of bacteria that act as plant pathogens. These strains may rapidly spread throughout crop populations, resulting in severe food shortages and economic issues for both consumers and farmers.
Bacteria may also enter the body through other means than cuts and lesions, resulting in a variety of infections and health problems. Helicobacter pylori is thought to be one of the leading causes of ulcers in humans.