Dilution is the process of making a solution weaker or less concentrated. In microbiology, serial dilutions (log dilutions) are used to decrease a bacterial concentration to a required concentration for a specific test method, or to a concentration which is easier to count when plated to an agar plate.
The broth dilution testis the oldest antimicrobial susceptibility testing method and involves the preparation of twofold dilutions of antibiotics in a liquid growth medium dispensed in test tubes. The antibiotic-containing tubes are inoculated with a standardized bacterial suspension.
Agar dilution and broth dilution are the most commonly used techniques to determine the minimal concentration of antimicrobial agents that kill (bactericidal activity, MBC) or inhibit the growth (bacteriostatic activity, MIC) of microorganisms (Wiegand et al., 2008).
Definition. A method to determine the minimum inhibitory concentration (MIC) of antibiotics in which growth media is pipetted into a multi-well plate. Each well contains a known concentration of drug which is inoculated with a known quantity of bacteria.
(Broth Tube Dilution Method)
The tube dilution test is the standard method for determining levels of resistance to an antibiotic. Serial dilutions of the antibiotic are made in a liquid medium which is inoculated with a standardized number of organisms and incubated for a prescribed time.
The pour plate technique, also sometimes called the loop dilution method, involves the successive transfer (serial dilution) of bacteria from the original culture to a series of tubes of liquified agar. Basically, a loopful of your original culture is transferred to a tube of liquifeid agar and mixed.
The MIC is defined as the lowest concentration of an antimicrobial agent that inhibits the growth of a microorganism. The method described in this document is intended for testing yeasts that cause clinically significant infections (primarily Candida species).
Ditch plate method is the method chosen to test the anti-bacterial activity of compounds. It is a preliminary method to screen the anti-microbial potential of compounds / drugs, which are insoluble or partially soluble in the aqueous phase.
Minimum inhibitory concentrations (MICs) are defined as the lowest concentration of an antimicrobial that will inhibit the visible growth of a microorganism after overnight incubation, and minimum bactericidal concentrations (MBCs) as the lowest concentration of antimicrobial that will prevent the growth of an organism ...
While MIC is the lowest concentration of an antibacterial agent necessary to inhibit visible growth, minimum bactericidal concentration (MBC) is the minimum concentration of an antibacterial agent that results in bacterial death. The closer the MIC is to the MBC, the more bactericidal the compound.
Agar is commonly used in the laboratory to help feed and grow bacteria and other microorganisms. It acts as a culture that provides nutrients and a place for these items to grow, but since it is indigestible to the microorganisms, they cannot eat and destroy it.
Serial dilution is used in microbiology to estimate the concentration or number of cells/organisms in a sample to obtain an incubated plate with an easily countable number of colonies. In biochemistry, serial dilution is used to obtain the desired concentration of reagents and chemicals from a higher concentration.
Dilution experiments are often referred to as parallelism studies because effectively one is judging whether or not dilutions of sample lie parallel to the calibration curve. Parallelism is assessed by assaying samples diluted in an appropriate analyte-free matrix.
The turbidimetric method is characterized by a series of tubes containing different concentrations of antibiotics in a liquid culture medium inoculated with the test microorganism. Reading data obtained after incubation provides a curve displaying the antibiotic concentration with turbidity.
It is a measure of the bactericidal activity of a chemical compound in relation to phenol. When listed numerically, the figure expressing the disinfecting power of a substance by relating it to the disinfecting power of phenol may be a function of the standardized test performed.
Kelsey-Sykes test is a triple challenge test, designed to determine concentrations of disinfectant that will be effective in clean and dirty conditions. The disinfectant is challenged by three successive additions of a bacterial suspension during the course of the test.
MIC stands for - Microphone
There may be one or more meaning of MIC , so check all meanings of MIC in the MIC data table all one by one.
The MIC value is the lowest concentration of an antibiotic at which bacterial growth is completely inhibited. In the agar dilution method, growth of 1–2 colonies or faint haze are disregarded [7,8].
A two-fold dilution reduces the concentration of a solution by a factor of two that is reduces the original concentration by one half. A series of two-fold dilutions is described as two-fold serial dilutions.
Double dilution method means the process of separating a part of the diluted exhaust flow and mixing it with an appropriate amount of dilution air prior to the particulate sampling filter.
There are two most commonly used streak patterns, a three sector “T streak” and four-quadrant streak methods. Picking a technique is a matter of individual preference and can also depend on how large the number of microbes the sample contains.
MBC Definition & Purpose
The MBC is identified by determining the lowest concentration of antibacterial agent that reduces the viability of the initial bacterial inoculum by a pre-determined reduction such as ≥99.9%.