Bench Cards for visual microbiology review
Original Learn Microbes cards for media reactions, biochemical patterns, stains, growth clues, and practical interpretation anchors.
A
Acetamide Utilization Visual Guide
A bench-card style visual for recognizing acetamide utilization as growth plus alkalinization, not just a pretty blue-green tube.
Bench cardBiochemical testsAcetate Utilization Visual Guide
An original acetate slant visual for reading growth and blue alkalinization in enteric and related bench profiles.
Bench cardB
Bacitracin Susceptibility (A Disk)
An original bench-card visual demonstrating bacitracin susceptibility for presumptive Group A strep identification.
Bench cardMedia reactionsBile Esculin Reaction Guide
A visual reference for recognizing esculin hydrolysis in the presence of 4% bile salts as a key marker for Enterococci and Group D Streptococci.
Bench cardBiochemical testsBile Solubility Test Guide
An original bench reference illustrating the dissolution of Streptococcus pneumoniae colonies under 10% sodium desoxycholate.
Bench cardDisk and spot testsButyrate Esterase Disk Guide
A bench reference for rapid spot-test identification of Moraxella catarrhalis based on butyrate esterase activity.
Bench cardC
CAMP Test Synergistic Hemolysis Guide
An original sheep blood agar bench diagram illustrating synergistic beta-hemolysis arrowheads for Group B Streptococci.
Bench cardDisk and spot testsCatalase Test Reaction Guide
An original slide-test bench reference for observing rapid oxygen bubble evolution to differentiate staphylococci from streptococci.
Bench cardMedia reactionsCetrimide Selective Agar Slant
A bench reference illustrating growth and fluorescent pigment production of Pseudomonas aeruginosa on selective cetrimide agar.
Bench cardMedia reactionsCitrate Utilization (Simmons Citrate)
An original Simmons Citrate slant guide for reading alkalinization in Enterobacterales and other Gram-negative rod profiles.
Bench cardBiochemical testsCoagulase Test Guide (Slide and Tube)
An original Learn Microbes bench guide for evaluating bound coagulase (slide clumping factor) and free coagulase (tube clotting) to identify Staphylococcus aureus.
Bench cardD
Decarboxylase Tests (Moeller's Method)
An original Learn Microbes bench guide for reading amino acid decarboxylation (Lysine, Ornithine, Arginine) reactions using Moeller's broth and mineral oil.
Bench cardBiochemical testsDNA Hydrolysis (DNase Test Agar)
An original Learn Microbes bench guide for recognizing deoxyribonuclease (DNase) activity on methyl green agar to differentiate key staphylococci, enterics, and respiratory cocci.
Bench cardF
Fermentation Media Visual Guide
An original broth-tube visual for reading carbohydrate fermentation as acid production, with gas captured separately in a Durham tube.
Bench cardStainsFlagella Stain Wet Mount Guide
An original schematic guide for recognizing flagellar arrangements after wet mount flagella staining.
Bench cardG
Gelatin Hydrolysis Visual Guide
An original deep-tube visual for reading gelatinase activity by liquefaction after chilling.
Bench cardGrowth conditionsGrowth at 42 C Visual Guide
An original temperature-tolerance visual for comparing growth at routine temperature with growth at 42 C.
Bench cardL
L-Pyrrolidonyl Arylamidase (PYR) Test
A bench guide to the PYR test, used for the presumptive identification of Group A streptococci (S. pyogenes) and Enterococci by detecting PYRase activity.
Bench cardDisk and spot testsLeucine Aminopeptidase LAP Test Guide
An original applicator-tip visual for reading LAP disk reactions after cinnamaldehyde reagent is added.
Bench cardMedia reactionsLitmus Milk Medium Visual Guide
An original multi-tube visual for separating litmus milk color reactions from clot, digestion, and peptonization patterns.
Bench cardMedia reactionsLysine Iron Agar Reaction Guide
An original Learn Microbes bench visual for reading LIA tube patterns without relying on textbook photos.
Bench cardM
Methyl Red / Voges-Proskauer (MRVP) Reaction Guide
An original four-tube bench visual for reading the Methyl Red and Voges-Proskauer combination test used to separate members of the Enterobacteriaceae family.
Bench cardBiochemical testsMicrodase Test (Modified Oxidase)
An original disk bench visual for reading modified oxidase activity to rapidly differentiate Micrococcus from Staphylococcus among catalase-positive Gram-positive cocci.
Bench cardBiochemical testsMotility Testing
A bench visual for reading semisolid motility medium deeps containing TTC indicator, used to determine whether bacterial species are motile.
Bench cardBiochemical testsMRS Broth (de Man, Rogosa, Sharpe)
An original two-tube bench visual for reading gas production in MRS broth, differentiating gas-producing Leuconostoc sp. from non-gas-producing Lactobacillus sp.
Bench cardBiochemical testsMUG Test (4-Methylumbelliferyl-β-D-Glucuronide)
A UV-fluorescence bench visual for reading the MUG disk test, used to presumptively identify β-glucuronidase-producing E. coli and other Enterobacteriaceae.
Bench cardN
Nitrate Reduction Test
A visual guide to the nitrate reduction test, illustrating the three distinct metabolic endpoints (reduction to nitrite, reduction to nitrogen gas, or no reduction) using a Durham tube and zinc dust.
Bench cardBiochemical testsNitrite Reduction Test
A visual guide to the nitrite reduction test, used to determine whether an organism can reduce nitrites to gaseous nitrogen or other nitrogenous compounds.
Bench cardO
ONPG Test
A bench visual for the ONPG test, used to detect β-galactosidase activity to differentiate late lactose fermenters from true non-lactose fermenters.
Bench cardBiochemical testsOptochin (P Disk) Susceptibility Test
A visual guide to the Optochin susceptibility test, key for the presumptive identification of Streptococcus pneumoniae.
Bench cardBiochemical testsOxidase Test (Kovac's Method)
A bench guide to Kovac's oxidase test, detecting cytochrome c oxidase activity to separate Pseudomonas (positive) from Enterobacteriaceae (negative).
Bench cardBiochemical testsOxidation/Fermentation (OF) Medium (CDC Method)
A visual guide to the OF medium test, used to classify bacteria as fermenters, oxidizers, or non-utilizers based on their carbohydrate metabolism under aerobic and anaerobic conditions.
Bench cardP
Phenylalanine Deaminase Agar
A bench guide to Phenylalanine Deaminase Agar, used to differentiate Proteus, Morganella, and Providencia (positive) from other Enterobacteriaceae (negative) by adding ferric chloride.
Bench cardBiochemical testsPyruvate Broth Utilization
A bench guide to Pyruvate Broth, used to differentiate Enterococcus faecalis (positive) from Enterococcus faecium (negative) based on their ability to utilize pyruvate.
Bench cardS
Salt Tolerance Test (6.5% NaCl)
A bench guide to the 6.5% NaCl salt tolerance test, used to differentiate salt-tolerant Enterococci (positive) from salt-sensitive nonenterococci (negative).
Bench cardBiochemical testsSpot Indole Test
A bench guide to the rapid Spot Indole test, detecting tryptophanase activity within 20 seconds to quickly differentiate Escherichia coli from Klebsiella.
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