antibiotic sensitivity test


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an·ti·bi·ot·ic sen·si·tiv·i·ty test

the in vitro testing of bacterial cultures with antibiotics to determine susceptibility of bacteria to antibiotic therapy.
See also: Bauer-Kirby test.

antibiotic sensitivity test

a laboratory method for determining the susceptibility of organisms to therapy with antibiotics. After the infecting organism has been recovered from a clinical specimen, it is cultured and tested against a panel of antibiotic drugs (the specific panel is determined by whether the organism is gram-positive and gram-negative). If the growth of the organism is inhibited by the action of the drug, it is reported as sensitive to that antibiotic. If the organism is not susceptible to the antibiotic, it is reported as resistant to that drug. See also sensitivity test.

an·ti·bi·ot·ic sen·si·tiv·i·ty test

(antē-bī-otik sensi-tivi-tē test)
In vitro testing of bacterial cultures with antibiotics to determine susceptibility of bacteria to antibiotic therapy.

antibiotic

1. destructive of life.
2. a chemical substance produced by a microorganism that has the capacity, in dilute solutions, to kill (biocidal activity) or inhibit the growth (biostatic activity) of other microorganisms. Antibiotics that are sufficiently nontoxic to the host are used as chemotherapeutic agents in the treatment of infectious diseases. See also antimicrobial.
3. used as feed additives to animals as growth promotants.

anthracycline a's
a group of antibiotics which have a tetracycline ring structure substituted with the sugar daunosamine. Includes the antineoplastic drugs doxorubicin and daunorubicin.
antineoplastic antibiotic
bactericidal antibiotic
one that kills bacteria.
bacteriostatic antibiotic
one that suppresses the growth of bacteria.
broad-spectrum antibiotic
one that is effective against a wide range of bacteria.
antibiotic detection
on-farm and prepackaged laboratory tests available for testing farm products and animal tissues and fluids for antibiotic residues.
antibiotic drugs
the range includes the following groups: penicillin, aminoglycoside, tetracycline, chloramphenicol, macrolide, nitrofuran, cephalosporins, and a miscellaneous group including bacitracin, tyrothricin, polymyxin, colistin.
antibiotic feed additives
see feed additives.
first generation antibiotic
one produced as a natural product, e.g. penicillin G. See second generation antibiotic (below).
antibiotic food preservation
is a satisfactory technique but very strictly controlled because of the problem of residues in the food. Used mostly for the preservation of fish.
antibiotic-induced diarrhea
see pseudomembranous colitis, acute undifferentiated diarrhea of the horse.
antibiotic residue in food
in human food of animal origin is a seriously regarded pollution in public health surveillance. The residues may arise from systemic administration, or even after absorption from a local site such as the uterus, but the most serious contamination arises from milk from quarters that have been treated for mastitis. It is essential for the safety of the human population, the financial well-being of the farmer and the professional reputation of the veterinarian that antibacterial withdrawal times are observed.
antibiotic resistance
see antimicrobial resistance.
second generation antibiotic
produced by manipulation of the molecular structure of a first generation antibiotic (see above) so that the metabolism and pharmacodynamics of the original compound are significantly altered.
antibiotic sensitivity test
see antimicrobial sensitivity test.
antibiotic therapy
antibiotics vary in their absorption from the alimentary tract, requiring some, e.g. streptomycin, to be given parenterally for systemic effect, freedom from toxicity, the range of bacteria against which they are effective, their capacity to stimulate resistance and whether they are bacteriostatic or bactericidal in their effects. Selection of the most suitable antibiotic to suit a particular circumstance may be guided by an antimicrobial sensitivity test, knowledge of the infection present and the price of the drug. In many instances, because of lack of knowledge of the infection present it is necessary to choose an agent with a broad antibacterial spectrum.
antibiotic withdrawal, antibiotic withholding
see antibacterial withdrawal time.
References in periodicals archive ?
In the antibiotic sensitivity test, the isolate was found to be resistant to ampicillin, moderately sensitive to cefazolin and cefoxitin and sensitive to amikacin, amoxycillin-clavunate, aztreonam, cefotaxim, ceftriaxon, ceftazidim, ciprofloxacin, imipenem, meropenem, trimethoprim-sulphametoxazole, piperacillin-tazobactam and levofloxacin.
All isolates identified were subjected to antibiotic sensitivity test (AST) by disc diffusion method to different antibiotics (Bauer et al.
As antibiotic sensitivity test is very useful and needful test, to know the accurate antibiotics for particular infections.
An attempt was taken for Antibiotic sensitivity test for the randomly selected biofilm forming bacterial isolates like Staphylococcus aureus (n=7), E.
When the antibiotic sensitivity tests were conducted, the genus Aeromonas showed more pronounced sensitivity to the antibiotics cefalotin, chloramphenicol, cefotaxime, nalidixic acid, erythromycin, cefalexin, tetracycline, and cefaclor.
For the detection of bloodstream infections, providing suficient number of blood culture sets under appropriate conditions and at appropriate times constitute the clinician's side of the diagnosis, whereas accurate interpretation of the growths in blood culture sets delivered to the laboratory, definition of the bacteriae grown and studying antibiotic sensitivity tests constitute the microbiologist's side.
The routine antibiotic sensitivity tests were put up for aminoglycosides [amikacin (30 [micro]g), gentamicin (10 [micro]g), netilmicin (30 [micro]g), tobramicin (10 [micro]g)], cephalosporin's [cefoperazone (75 [micro]g), cefepime (30 [micro]g), ceftazidime (30 [micro]g), ceftriaxone (30 [micro]g), ceftizoxime (30 [micro]g)], floroquinolones [ciprofloxacin (5 [micro]g), gatifloxacin (5 [micro]g), lomefloxacin (10 [micro]g)], carbapenems [imipenem (10 [micro]g), meropenem (10 [micro]g)], chloramphenicol (30 [micro]g) and piperacillin/tazobactum (100/10 [micro]g).
The benefits of culture in these circumstances are that, if an organism is isolated, the antibiotic sensitivity tests will be of value in treating patients who fail first-line therapy.
Your veterinarian was correct to have culture and antibiotic sensitivity tests performed on the discharge.
Antibiotic Sensitivity Tests (mm) Description AMC FOS E S SXT P N ENR [E.
Ordinary culture of purulent discharge and antibiotic sensitivity tests were conducted on nine patients, and they were treated with appropriate antibiotics via intravenous or intramuscular injection.

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