![]() The spherical bacteria are further divided into types depending on their cocci arrangement.Ĭocci arranged in pairs are called diplococcus bacteria. The cell wall or the peptidoglycan is responsible for retaining the shape after isolation. The rod-shaped bacteria, by mutation, could have been converted to spherical-shaped bacteria. Phylogenetic studies reveal that spherical bacteria could have evolved from rod-shaped bacteria. ![]() The spherical-shaped bacteria are the most studied. Spherical-Shapedīacteria that are spherical or round in shape are called coccus or cocci in the plural. They are classified depending on the three basic shapes. Types of bacteriaīacteria are divided into types depending on their size and shape. ![]() Examples of bad bacteria are Clostridium and Staphylococci species. Bad bacteria will have adverse effects on our health. Good bacteria live in our gut and promote gut health.Įxamples of good bacteria are bifidobacteria and lactobacillus species. The advancement of knowledge in protein expression studies also makes the organism suitable for research.īacteria can be categorised as good bacteria and bad bacteria. They can also be propagated and studied easily in laboratories. They are omnipresent and can easily adapt to changes by selective mutations.Įscherichia coli is a common bacterium that is used in the research field because of its easy availability, and it is relatively simple compared to other bacteria. The nuclear membrane is absent in bacteria, and they divide by binary fusion.īacteria are both parasitic and free-living forms. What are bacteria?īacteria are prokaryotic organisms, single-celled organisms. Gram-negative bacteria are more resistant to antibiotics than gram-positive bacteria, comparatively. Gram negative bacteria are Pseudomonas aeruginosa and Escherichia coli. Gram-positive bacteria are Pediococcus pentosaceus, Staphylococcus aureus and Streptococcus pyogenes. Bacteria are not visible to our naked eyes and can be only seen through a microscope.īacteria can be categorised as gram-positive and gram-negative bacteria.
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