Bacteria, also called germs, are microscopic organisms not visible with the naked eye. Bacteria are single-celled, or simple, organisms. Though small, bacteria are powerful and complex, and they can survive in extreme conditions.
What are the main types of bacteria?
Bacteria are divided into five basic groups based on morphology (shape): coccus, bacillus, spiral, coryneform, and filamentous. When bacteria are Gram-stained, they may be further classified as Gram-positive, Gram-negative, or Gram-variable depending on the ability of their cell walls to hold a specific type of stain.
What are 5 examples of bacteria?
Here are seven types of bacteria to be concerned about as you fill up your next glass of water:1) Escherichia Coli. Escherichia Coli (also known as E. 2) Campylobacter Jejuni. 3) Hepatitis A. 4) Giardia Lamblia. 5) Salmonella. 6) Legionella Pneumophila. 7) Cryptosporidium.May 4, 2018
What are 4 examples of bacteria?
There are four common forms of bacteria-coccus,bacillus,spirillum and vibrio.Coccus form:- These are spherical bacteria. Bacillus form:- These are rod-shaped bacteria. Spirilla form:- These are spiral-shaped bacteria that occur singly.Vibrio form:- These are comma-shaped bacteria.
How many type of bacteria are there?
How Many Named Species of Bacteria are There? There are about 30,000 formally named species that are in pure culture and for which the physiology has been investigated.
What characteristics are used to classify bacteria?
When identifying bacteria in the laboratory, the following characteristics are used: Gram staining, shape, presence of a capsule, bonding tendency, motility, respiration, growth medium, and whether it is intra- or extracellular.
What is the name of harmful bacteria?
Harmful bacteria are called pathogenic bacteria because they cause disease and illnesses like strep throat, staph infections, cholera, tuberculosis, and food poisoning.