What are the methods used for controlling microbial growth?
The following points highlight the top nine methods used for controlling Microbial Growth. The Methods are: 1. Sterilization by Heat 2. Sterilization by Dry Heat 3. Sterilization by Moist Heat 4.
What is meant by bacteriostatic control of microbial growth?
Control of Microbial Growth: Definitions BacteriostaticAgent: An agent that inhibitsthe growth of bacteria, but does not necessarily kill them. Suffix stasis: To stop or steady. Germicide: An agent that kills certain micoorganisms.
How to control of microbial growth by dry heat?
Control of Microbial Growth: Method # 2. Dry heat is glass-wares or other heat stable solid material used to sterilize many object/articles in the absence of water. The items to be sterilized are placed in an oven at 160 to 170°C for 2 to 3 hours. Microbial death apparently results from oxidation of cell constituents and denaturation of protein.
What are the factors that make antimicrobials effective?
4. Time of Exposure:Chemical antimicrobials and radiation treatments are more effective at longer times. In heat treatments, longer exposure compensates for lower temperatures. Phsysical Methods of Microbial Control:
What is the most widely used method of microbial control?
Heat is the most widely used method of microbial control. -Bacterial endospores exhibit the greatest resistance to disinfection methods. -Vegetative cells vary in their sensitivity to heat. -Both temperature and length of exposure should be considered for adequate sterilization.
Which treatment can reduce microbial population?
Sterilization Sterilization is the process of destroying all living organisms and viruses. A sterile object is one free of all life forms, including bacterial endospores, as well as viruses.
What are the three ways to control microbial growth?
Use of Chemicals.Cleaning: Cleaning involves sweeping, wiping, washing and brushing of a material, which removes most of the microbes present on it. ... Low Temperature: ... High Temperature: ... Filter Sterilisation: ... Radiation Sterilisation: ... Removal of Moisture: ... Modified Atmosphere Packaging: ... Lowering of pH:More items...
What is the most important control to stop bacterial growth?
Heat: most important and widely used. For sterilization one must consider the type of heat, and most importantly, the time of application and temperature to ensure destruction of all microorganisms. Endospores of bacteria are considered the most thermoduric of all cells so their destruction guarantees sterility.
How do we control microbial growth chemically?
Chemical control refers to the use of disinfectants, antiseptics, antibiotics, and chemotherapeutic antimicrobial chemicals. Sterilization is the process of destroying all living organisms and viruses. Disinfection is the elimination of microorganisms, but not necessarily endospores, from inanimate objects or surfaces.
What are the chemical methods of controlling microbial growth?
Commonly used chemical preservatives include sorbic acid, benzoic acid, and propionic acid, and their more soluble salts potassium sorbate, sodium benzoate, and calcium propionate, all of which are used to control the growth of molds in acidic foods.
What are 5 different ways to control microbial growth?
How to Control Microbial Growth: Top 9 MethodsSterilization by Heat:Sterilization by Dry Heat:(I) Hot Air oven or Sterilizer:(II) Incineration:Sterilization by Moist Heat:Steam Under Pressure: Autoclave:Tyndallization (Fractional Sterilization):Pasteurization:More items...
What is used to control microbial growth in foods?
Pasteurization is used to kill pathogens and reduce the number of microbes that cause food spoilage.
What is microbial control?
A microbial control program plays a key role in controlling pathogenic microorganisms in food. The goal of microbial control is to identify food safety risks due to pathogenic microorganisms present in food manufacturing. A successful program is based on prevention, inhibition, and removal of harmful microbes.
How can you prevent bacterial growth?
How to Prevent Bacteria GrowthKeep things dry. Bacteria need moisture to thrive, and most bacteria will quickly multiply in wet or moist conditions. ... Use a sanitizer on your hands. ... Heat food thoroughly and store properly. ... Clean surfaces well. ... Use antibiotics.
How do you control microbial contamination?
HOW CAN WE PROTECT AGAINST MICROBIAL CONTAMINATION? Some microbial contaminants can be removed by water treatment coagulation and filtration processes. Disinfection has proven effective against bacteria and viruses, but protozoa such as Giardia and especially Cryptosporidium are very resistant to chlorination alone.
What bacteria causes botulism?
For example, foods preserved by canning often become contaminated with the bacterium Clostridium botulinum, which produces the neurotoxin that causes botulism. Because C. botulinum can produce endospore s that can survive harsh conditions, extreme temperatures and pressures must be used to eliminate the endospores.
What are the factors that determine the level of antimicrobial resistance?
The second factor is the level of resistance to antimicrobial treatment by potential pathogens.
Why is aseptic technique important?
For many clinical purposes, aseptic technique is necessary to prevent contamination of sterile surfaces. Aseptic technique involves a combination of protocols that collectively maintain sterility, or asepsis, thus preventing contamination of the patient with microbes and infectious agents.
What are inanimate objects that help prevent disease?
Inanimate items, such as doorknobs, toys, or towels, which may harbor microbes and aid in disease transmission, are called fomites.
Why are critical items sterile?
Critical items must be sterile because they will be used inside the body, often penetrating sterile tissues or the bloodstream; examples of critical item s include surgical instruments, catheters, and intravenous fluids.
Which BSL agent requires the fewest precautions?
For example, the lowest BSL, BSL-1, requires the fewest precautions because it applies to situations with the lowest risk for microbial infection. BSL-1 agents are those that generally do not cause infection in healthy human adults.
Is a disinfectant sterile?
Because some microbes remain, the disinfected item is not considered steril e. Ideally, disinfectant s should be fast acting, stable, easy to prepare, inexpensive, and easy to use.