Urease Test Protocol
Peptone 1 g Dextrose 1 g Sodium chloride 5 g Potassium phosphate, monobasic 2 g Urea 20 g Phenol red 0.012 g Agar 15 to 20 g To prepare the urea base, dissolve the first six ingredients in 100 ml of distilled water and filter sterilize (0.45-mm pore size). Suspend the agar
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Catalase Test Protocol - American Society for Microbiology
asm.orgThe catalase test is also valuable in differentiating aerobic and obligate anaerobic bacteria, as anaerobes are generally known to lack the enzyme (8, 9). In this context, the catalase test is valuable in differentiating aerotolerant strains of Clostridium, which are catalase negative, fromBacillus, which are catalase positive (8). Theory
Luria Broth (LB) and Luria Agar (LA) Media and Their Uses ...
asm.orgDownloaded from www.asmscience.org by IP: 71.127.236.37 On: Mon, 12 Aug 2019 20:18:49 American Society for Microbiology © 2016 1 Luria Broth (LB) and Luria Agar (LA ...
Indole Test Protocol
asm.orgDissolve components and store solution at room temperature in a brown glass bottle. To test for indole production, inoculate a 4 -ml tryptone broth tube with one loopful of culture. After 24 to 48 hours of incubation, add to the culture 1.0 ml of either ether or xylene. Mix well and then allow organic solvent to rise to the top of the medium.
Blood Agar Plates and Hemolysis Protocols
asm.org"Blood Agar" is not a consistently defined medium. The term "blood agar" generally refers to an enriched base medium to which defibrinated mammalian blood has been added. In the US "blood agar" is usually prepared from Tryptic Soy Agar or Columbia Agar base with 5% Sheep blood. Rabbit or horse blood may be
Gram Stain Protocols
asm.org7. Wash slide in a gentile and indirect stream of tap w ater until no color appears in the effluent and then blot dry with absorbent paper. 8. Observe the results of the staining procedure under oil immersion using a Brightfield microscope. At the completion of the Gram Stain, gram-negative bacteria will stain pink/red and gram-positive ...
Microorganisms, Mold, and Indoor Air Quality
asm.orgings with poor indoor air quality anywhere in this or other countries. 2 Water stained ceiling tile from an office building with chronic roof leakage. Culture of Trichoderma showing fluffy,spreading growth on the agar surface. Visible mold growing on a floor joistin the crawl space under a residence with chronic water seepage.
Kirby-Bauer Disk Diffusion Susceptibility Test Protocol
asm.orgInstitute Performance Standards for Antimicrobial Disk Susceptibility Tests: Approved Standards 9th Edition (3). RECIPE Sterile saline in 2-ml tubes 0.5 McFarland standard Wickerham card Mueller-Hinton agar plates, 100 mm or 150 mm Caliper or ruler Antibiotic disksb Forceps Antibiotic disk dispenser (optional) 18- to 24-ho Vortex
Oxidase Test Protocol - American Society for Microbiology
asm.orgFIG. 3. On the left is oxidase-positive Pseudomonas aeruginosa and on the right is oxidase-negative Escherichia coli. Both organisms were rubbed on a dry filter that was then treated with one drop of Kovács oxidase reagent. Direct Plate Method (7, 10) (Fig. 4) 1. Grow a fresh culture (18 to 24 hours) of bacteria on nutrient agar
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Nutrient Agar - himedialabs.com
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Product Instructions
multimedia.3m.com(buffered peptone water (BPW) (ISO)) may inhibit the DNase reaction resulting in no pink zone formation when the 3M Petrifilm STX Plate is used with the 3M Petrifilm STX Disk. It is important to verify the performance of the 3M Petrifilm STX Disk with the diluent chosen for sample preparation. Failure to do so, may result in false negatives.
LAB 4. Cultivation of Bacteria - University of Maryland ...
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uk.vwr-cmd.comchloride-peptone solution pH 7.0 or in another suitable liquid. In general a one in ten dilution is prepared. However, the characteristics of the product or the required sensitivity may necessitate the use of other ratios. If the product is known to have antimicrobial activity, an inactivating agent may be added to the diluent.
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www.fws.govprotein (peptone) present in the agar. In this case, nitrogenous bi-products are produced and the pH in the media rises until the pH indicator shows a reversion from yellow (acid) to red (alkaline). Blackened medium is caused by hydrogen sulfide production, which changes ferrous sulfate to …
Types of culture media used in microbiology
www.ramauniversity.ac.inPeptone Water. Peptone 1% and sodium chloride 0.5%. It is used as base for sugar media and to test indole formation. Blood Agar. Most commonly used medium. 5- 10% defibrinated sheep or horse blood is added to melted agar at 45-50°C. Blood acts …
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www.sas.upenn.eduPeptone is used in culture media to mainly supply nitrogen. Most organisms are capable of utilizing the amino acids and other simpler nitrogenous compounds present in peptone. Thus, in many cases, the complicated infusion media can be replaced by simpler media prepared by