Bacteria Definition
Domain Bacteria examples:
There are three main domains, bacteria is one of them. Examples of this domain are given below in the diagram below:
Bacteria Characteristics
Bacteria Facts
Bacteria Classification
They are basically classified into five major groups. This classification is done on the basis of its shape. The spherical shape is called Cocci, Rod shape is called bacilli, Spiral shape is called spirilla, comma shape is called vibrios.
Bacteria Shapes
They usually occur in three shapes coccus, spiral, and Bacillus.
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Cocci shape:
Cocci shape:
Cocci shape:
These are ovoid or spherical in shape. They are found in the chain or in the isolated form. For example, Diplococci are cocci occurs in pairs, streptococci exist in chains, and staphylococci are present in clusters of manifold cocci. Tetrads are which have square arrangements of four cocci. Sarcinae eight cocci cubes.
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Spiral Shape:
Spiral Shape:
Spiral Shape:
They are spiral-shaped. Spirillums are basically thick, threatening spirals. Spirochetes are also spirals which have thin and flexible texture. Vibrios are comma shape rods which have a little twist.
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Bacilli Shape:
Bacilli Shape:
Bacilli Shape:
They are basically rod-shaped. They sometimes present in isolate form while occasionally arranged in a chain. Diplobacilli are basically two bacilli which are arranged adjacent to each other.
Bacteria Structure:
Bacteria Structure:
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Types of Bacteria
Types of Bacteria
Broadly there are two main types:
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Gram-positive bacteria
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Gram-negative bacteria
Gram-positive bacteria
Gram-positive bacteria
Gram-positive bacteria
Gram-negative bacteria
Gram-negative bacteria
Gram-negative bacteria
Examples of Bacteria
1. Escherichia coli.
1. Escherichia coli.
1. Escherichia coli.
Common species are Escherichia coli. Its shape is Bacillus. Commonly found animals intestine including humans. In the intestine, they produce vitamin B complex and vitamins K. E. coli usually utilize in the laboratory for the research purposes. They reproduce rapidly due to this they are extensively used for research purposes. They are usually harmless but some species of E. coli can cause diseases in humans. They usually cause gastrointestinal problems in humans.
2. Lactobacillus acidophilus
2. Lactobacillus acidophilus
2. Lactobacillus acidophilus
Lactobacillus acidophilus is bacillus shape which commonly finds in vagina and intestine of human beings. Being probiotic, it is present in yogurt and food produces by fermentation.
3.Clostridium botulinum
3.Clostridium botulinum
3.Clostridium botulinum
Clostridium botulinum causes special disease Botulism. C. botulinum bacteria generate the neurotoxin botulinum that causes botulism. Its symptoms include blurred vision, paralysis, nausea, muscles weakness and trouble to breathe.
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