Bacteria are one type of microorganism that can cause disease and can be found virtually everywhere, including in the soil and water. Bacteria have been detected on plants, animals, fruits, and vegetables.
In general, the most common symptoms from a bacterial infection are diarrhea, which may be bloody, and fever. Other symptoms such as vomitting and abdominal cramping may also occur. Symptoms generally begin a day or two after ingestion of the contaminated food item and last for several days.