What methods are used for bacterial differentiation?
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 are the 3 methods to control the bacteria?
Methods of Controlling Microorganism Growth
- HEAT – The easiest, effective way to control microbial growth is to use a FLAME.
- BOILING – Will not kill bacterial spores, so may not be sterile.
- AUTOCLAVE – Spores are killed with exposure to autoclave.
- OVEN – Oven use dry heat.
What are 5 physical methods of microbial control?
Methods of microbial control that include exposure of the microbe to extremes of heat and cold, desiccation, lyophilization, filtration, osmotic pressure, and radiation.
What are the 3 classification of bacteria?
Bacteria are usually grouped into three categories, classified by shape: spherical, cylindrical and spiral.
What are 4 types of bacteria?
Bacteria can be classified based on their shape into bacillus, coccus, vibrio and spirillum.
What are 5 different ways to control microbial growth in the lab?
Microorganisms are controlled by means of physical agents and chemical agents. Physical agents include such methods of control as high or low temperature, desiccation, osmotic pressure, radiation, and filtration.
What are the 6 methods of physical control of microorganisms?
Name six methods of physical control of microorganisms. Heat, radiation, filtration, ultrasonic waves, cold, abrupt changes in environment, drying, osmotic pressure, desiccation (dehydrate)— number one component of cytoplasm is water so dehydration can be used.
What are physical separation methods?
Physical separation methods, such as filtration and distillation, are based on the difference in particle size and on the boiling point of the substances in the mixture, respectively. These are properties that can be observed and measured without changing the material itself.
What are 4 characteristics of bacteria?
What Are the Characteristics Common to All Bacteria?
- Single-Celled. Perhaps the most straightforward characteristic of bacteria is their existence as single-celled organisms.
- Absent Organelles.
- Plasma Membrane.
- Cell Walls.
- DNA.
What are the four classes of bacteria?
By combining morphology and Gram-staining, most bacteria can be classified as belonging to one of four groups (Gram-positive cocci, Gram-positive bacilli, Gram-negative cocci and Gram-negative bacilli).
What are the 3 main types of bacteria?
There are three basic shapes.
- Spherical: Bacteria shaped like a ball are called cocci, and a single bacterium is a coccus. Examples include the streptococcus group, responsible for “strep throat.”
- Rod-shaped: These are known as bacilli (singular bacillus).
- Spiral: These are known as spirilla (singular spirillus).
What are ways to control bacterial growth?
The control of microbial growth may involve sterilization, disinfection, antisepsis, sanitization, or degerming. Sterilization is the destruction of all forms of microbial life, with particular attention to bacterial spores.