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Antibiotic Sensitivity Test - Coggle Diagram
Antibiotic Sensitivity Test
Disk Diffusion Method
Kirby-Bauer Method
-Muller Hinton Agar
-Sterile Cotton Swab
-Bacterial suspension
-Antibiotic Disc
-Forceps
-Multi disc dispenser
Need to prepare a bacterial suspension from the pure
culture
Pick a sterile test tube and mark the number & add 1-2 ml of the molar hidden growth
sterilize the wire loop and keep it for cooling
pick the bacterial colonies from the pure culture & transfer to the test tube containing growth to prepare a bacterial suspension
Convert the bacteria with 0.5 maxwell and standards
Label the mola hindu naga with test culture details or with the identification numbers
Take the sterile cotton swab and the bacterial suspension dip the swab into the bacterial growth
Take it out and remove any excess liquid by pressing the swab against the side wall of the tube
open the plate and inoculate as long culture
wipe the swap inside two side motion, gently the idea is to create
uniform layer of bacteria
after completely swabbing the plate in one direction slightly rotate the plate and continue swabbing and repeat the swapping process
run the swap around the circumference of the plate close the plate and then dispose the swab in a biohazard container
place antibiotic disc onto the swag dagger surface
first select the antibiotics you can transfer the disc with the help of a forceps or also you can use a multi disc dispenser
now sterilize the tip of the forceps and pick up the disc carefully from one antibiotic set and place the disc onto the swab dagger surface
keep at least 25 millimeter distance from this to disk maximum 6 discolor should be applied on a 90 mm plate
close the platelet and keep the plate in an incubator at 37 degrees celsius in inverted position for overnight
Stokes Method
-Miller Hinton agar
-Ruler
-Marker
-Test strain
-Control strain (ATCC)
-Sterile cotton swab
in this method the test organism is inoculated on one part and the control organism in the other part of the plate with a little gap in the middle
make sure the uninoculated gaps leaving a distance of three to four millimeter wide is needed when performing the dust
once the inoculation is finished place the antimicrobial disc in the gap between the test and control strain by using sterile forceps
then incubate the plate aerobically at 37 degrees celsius for 18 to 24 hours (incubation measure the radius of the inhibition sawn)
Check the zone in test & control area from the middle of the disc to the edge
Kirby Baur Assay Technique Demonstration
Preparing the Plate
3) label them A,B,C for each substance
1) Start by labelling the plate
2) Divide the plates into six parts
4) Start by flaming the top of the tube
5) Remove a sterile cotton swab from the package and dip it into the test tube and then press the cotton swab against the inside of the tube to remove excess broth
6) Take the cotton swab with bacteria and cover the entire surface
7) Move the cotton swab back and forth covering as much of the auger as possible
8) Rotate the plate and swab and repeat the process.
9) Next is for the filter paper disc where it is filled with chemicals
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Definition
Laboratory test for determining the susceptibility of organism to antibiotic theraphy
to determine which antibiotic is successful in treating the bacterial infection
Uses of Antibiotic Sensitivity Testing
Helps the clinician in choosing the best antibiotic
To control the use of inappropriate
To determine the potential effectiveness of specific antibiotics on the bacteria
To determine if the bacteria have developed resistance to certain antibiotics
Helps the local pattern of antibiotic prescribing
Types of reaction
Resistence
small zone size
the infection is not treatable with tested antiobiotic
Intermediate
medium zone size
the infection is not treatable with normal dose
Sensitive
large zone size
the infection is treatable with recommended dosage