Medical Dictionary: Bacterium

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Bacterium: Another name for Bacterial diseases.
Bacterium (condition): Any condition caused by bacteria.
Bacterium (condition): Bacteria are single-celled creatures with tiny flagella. Bacteria are alive. They are very small organisms, often only a single cell. Bacteria need to get energy, and may emit toxins or waste products. By comparison, viruses are much smaller, and are not exactly "alive" in the normal sense.

Bacterium: Microbes belonging to the bacteria group are made up of only one cell. Under a microscope, bacteria look like balls, rods, or spirals. Bacteria are so small that a line of 1,000 could fit across the eraser of a pencil. Life in any form on Earth could not exist without these tiny cells. ¹

More information on medical condition: Bacterial diseases:

• Introduction: Bacterial diseases
• Basic Summary for Bacterial diseases
• Types of Bacterial diseases

Footnotes:
1. excerpt from Microbes in Sickness and in Health - Publications, National Institute of Allergy and Infectious Diseases: NIAID

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