Classification On the basis Of Shape | |
1. Cocci | Cocci are round or oval in shape. (singular coccus) For example meningococci and gonococci. cocci are further classified into the following groups on the basis of their microscopic arrangement.
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2. Bacilli | Bacilli are rod-shaped bacteria. For example E. coli, Salmonella, C. Tatani. B. anthrax etc. |
3.Spirochetes | Spirochetes are spiral shaped they have a flexible cell wall. for example, Treponema, Borrelia, leptospira etc. |
4. Vibro | Vibro are comma-shaped, for example, Vibrio cholera and vibro vulnificus etc. |
Classification On the basis Of Staining | |
1. Gram-Positive Bacteria | Gram-positive bacteria are those which hold the crystal violet dye after being washed with the alcohol. They are stained dark purple in colour. They have this Property because they contain a higher quantity of peptidoglycan in their cell wall For example. Streptococci, Clostridium, Bacillus anthrax etc. |
2. Gram Negative Bacteria | Gram-negative Bacteria lose the crystal violet dye when they are washed with alcohol. Then they are counterstained and give a pink or red colour in the Gram staining technique. For example E. coli, Salmonella Typhi. etc |
3. Acid Fast Bacilli. | Acid Fast bacilli are those which hold the dye even after being washed with acid. These bacteria are not stained by gram staining technique. These are stained Using a special type of staining procedure called Zeihl Nelson Staining technique |
Classification On the basis Of Temperature | |
1. Thermophiles | Thermophiles are those bacteria which grow best in higher temperature. for example Campylobacter jejuni which grows best at 42-degree centigrade. |
2. Mesophiles | Mesophiles grow best at moderate temperature. many bacteria belong to this group |
3. Psychrophiles | Psychrophiles Grows best at a lower temperature. |
Classification On the basis Of Oxygen Requirement | |
1. Aerobes | Aerobes are those bacteria which can grow only in the presence of a normal concentration of oxygen For example Mycobacterium Tuberculosis |
2. Anaerobes | Anaerobes are those bacteria which can grow only in the absence of Oxygen, for example, Bacteroides. |
3. Facultative Anaerobes | These bacteria are capable of growing both in the presence and absence of Oxygen, for example, E. coli |
4. Micro-aero phillic | These bacteria require an extremely low concentration of Oxygen for their growth. |
Classification On the basis Of Cell Wall | |
1. Thick Walled Bacteria | These bacteria have thick cell wall for example All gram-positive and gram-negative bacteria |
2. Thin-walled Bacteria | these have thin flexible cell wall for example spirochetes |
3. Wall-less Bacteria | e.g Mycoplasma |
Classification On the basis Of Spore Formation | |
1. Spore Forming Rods | Aerobic: Bacillus Anthrax Anaerobic: Clostridium |
2. Non-Spore Forming Rods | Non-Filamentous: Corynebacterium Filamentous: Listeria Actinomyces Nocardia |
Parasite: A parasite is a living organism which gets nutrition and protection from another organism where it lives. Parasites enter into the human body through mouth, skin and genitalia. In this article, we will generally discuss the types and classification of parasites. It is important from an academic point of view. Those parasites are harmful, which derives their nutrition and other benefits from the host and host get nothing in return but suffers from some injury. Types of Parasites Ecto-parasite: An ectoparasite lives outside on the surface of the body of the host. Endo-parasite: An endo-parasite lives inside the body of the host, it lives in the blood, tissues, body cavities, digestive tract or other organs. Temporary parasite: A temporary parasite visits its host for a short period of time. Permanent parasite: Permanent parasite lives its whole life in the host. Facultative parasite: A facultative parasite can live both independently and dependently. It lives in the
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