At LPS, we understand the importance of reliable and affordable microbiological supply solutions for our customers in varied environments, from research laboratories to medical laboratories and beyond. We provide procurement of a wide range of products, including dehydrated and prepared media, both bottled and plated, organisms, and supplies such as inoculating loops and needles.

Please also see our collection of other Life Science products for a complete offering of whatever you may need for your important work.  We're always here if you have questions or need assistance - email or call us!

When ordering media, decide between prepared and dehydrated forms. Prepared plates (15 x 100 mm, plus 15 x 65 mm contact plates for surface monitoring), tubes and bottled broths save preparation time but have shorter shelf lives and usually need refrigeration, so order quantities you can use before the expiration date. Dehydrated media store longer but must be weighed, prepared and sterilized in house. Look for USP-designated media when your testing follows compendial methods, and pair them with quality control organisms such as ATCC-derived strains in DuoPak format. Sterile plastic inoculating loops come in calibrated volumes such as 10 µl.

Microbiology: common questions

What is a bacterial freezing kit?

A bacterial freezing or preservation kit usually contains cryovials prefilled with a cryoprotective broth, often with porous beads. You add a fresh culture, let the organisms attach to the beads, remove the excess liquid and freeze the vial, typically at -70°C or colder. Later, a single bead can be removed to start a culture without thawing the whole vial. Follow the kit maker's instructions for your organism.

What are contact plates used for?

Contact plates are small plates filled so the agar forms a raised, convex surface. They are pressed directly onto flat surfaces such as benches, equipment or gloves to sample microorganisms for environmental monitoring. Media for this use often contain neutralizers, such as lecithin and polysorbate (Tween), to counteract disinfectant residues picked up from the surface.

What are dilution blanks?

Dilution blanks are tubes or bottles prefilled with a measured volume of sterile diluent, such as buffered water or peptone water. They are used for serial dilutions of samples before plating or counting, so each step has an accurate, sterile volume without preparing and sterilizing the diluent in house.

Can prepared media be returned?

Returns are accepted within 30 days by mail, with the customer paying return shipping, but refrigerated or frozen items, sterile items and hazardous items cannot be returned. Most prepared plates and tubes fall into those groups, so check quantities and expiration needs before ordering. Many items ship directly from the manufacturer, so lead times vary by item.

Microbiology

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  1. EC Broth; HDx,20x125mm w/Durhm Tube
    SKU: K13-PK
    Manufacturer: Hardy Diagnostics
    (Single Strength EC Broth with durham tube for gas detection) For the detection of coliforms in water. (20 per PK)
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    was $68.04 Special Price $54.57
  2. Standard Methds Ag, 400ml; HDx, 16 oz. glass btl BR
    SKU: U395-PK
    Manufacturer: Hardy Diagnostics
    Standard Methods Agar (Plate Count Agar/Tryptone Glucose Yeast (TGY) Agar), 400ml, 16 ounce glass bottle, order by the package of 12, by Hardy Diagnostics (Plate Count Agar) For the cultivation and enumeration of microorganisms in dairy products, food, and water. (12 per PK)
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    was $200.58 Special Price $160.88
  3. Potato Flake Sel. Agar; HDx, plstc HardyFlask R
    SKU: X59-PK
    Manufacturer: Hardy Diagnostics
    Potato Flake Selective Agar (with Cipro and Vanco), 12ml, 50ml plastic HardyFlask™, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS For the selective isolation of pathogenic fungi. Contains ciprofloxacin and vancomycin for the inhibition of most bacteria. HardyFlask™ Features: Lightweight For reduced shipping cost and less chance of breakage. Stackable For increased conservation of space, both in incubator and refrigerator. No special storage racks are needed. Interlocking For increased stability when incubating and transporting. Large surface area For the inoculum. Almost double the area! better isolation of colonies. Slanted neck Facilitates easy inoculation of the flat media surface. Improved clarity For better visibility of the growing culture, both front and back. (20 per PK)
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    was $156.83 Special Price $125.80
  4. Anaerobic Pea Pk10
    SKU: A90-PK
    Manufacturer: Hardy Diagnostics
    CDC formula with phenylethanol, 5% sheep blood, hemin, and vitamin K) For the isolation of anaerobic bacteria. Comparable to: Remel R01040 (10 per PK)
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    was $18.69 Special Price $14.99
  5. MYCOBIOTIC AGAR PK10
    SKU: W50-PK
    Manufacturer: Hardy Diagnostics
    Mycobiotic Agar, deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics For the selective isolation of pathogenic fungi especially from hair, skin, and nail specimens. Contains chloramphenicol and cyclohexamide. Comparable to: Remel R01630 (10 per PK)
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    was $20.15 Special Price $16.16
  6. Nutrient Broth, 20ml; HDx, 20x150mm tube
    SKU: K243-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS A general purpose growth medium recommended for use in the cultivation of nonfastidious microorganisms. (20 per PK)
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    was $117.52 Special Price $94.25
  7. Saline,0.9% w/Tween,100ml; HDx, 125ml PP bottle
    SKU: U304-PK
    Manufacturer: Hardy Diagnostics
    Saline, 0.9% with 0.5% Tween® 80, 100ml fill, 125ml polypropylene bottle, order by the package of 12, by Hardy Diagnostics MINIMUM ORDER: 3 PACKS (0.9% NaCl with 0.5% Tween® 80) For preparing dilutions and suspensions of microorganisms. (12 per PK)
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    was $114.89 Special Price $92.15
  8. MacConkey Agar Deep; HDx, 20x150mm tb 20/pk R
    SKU: Q63-PK
    Manufacturer: Hardy Diagnostics
    MacConkey Agar Deep, 20x150mm tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS Hardy Diagnostics MacConkey Agar is recommended for use as a selective and differential medium for the isolation of gram-negative bacilli (including coliform organisms and enteric pathogens), on the basis of lactose fermentation. (20 per PK)
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    was $87.67 Special Price $70.32
  9. Martin Lewis w/Lincomycin; HDx, 15x100mm plate R
    SKU: E39-PK
    Manufacturer: Hardy Diagnostics
    Martin Lewis Agar with lincomycin, reduced vancomycin, colistin, amphotericin, and trimethoprim) For the selective isolation of Neisseria gonorrhoeae. Comparable to: BD 297928 (10 per PK)
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    was $24.06 Special Price $19.30
  10. BHI Agar Slant; HDx, 16x100mm tube
    SKU: L36-PK
    Manufacturer: Hardy Diagnostics
    BHI (Brain Heart Infusion) Agar Slant, 5.5ml fill, 16x100mm tube, order by the package of 20, by Hardy Diagnostics (Brain Heart Infusion Agar) For the cultivation of microorganisms. Comparable to: BD 4321785A (20 per PK)
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    was $78.13 Special Price $62.66
  11. Ethanol 70% for Trichr; Volu-Sol, 32oz, OR
    Manufacturer: Hardy Diagnostics
    Ethanol 70% for Trichrome, 32 ounces, by Volu-Sol For trichrome and other uses, reagent grade. Comparable to: Remel R40135 (1 per EA)
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    was $42.13 Special Price $33.79
  12. CNA Agar/MacConkey biplt; HDx,15x100 biplt 100/BX R
    Manufacturer: Hardy Diagnostics
    (Columbia Agar with 5% Sheep Blood, Colistin and Nalidixic Acid / MacConkey Agar) Comparable to: Remel R02066 (100 per PK)
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    was $125.33 Special Price $100.53
  13. TSA/CET/MSA; HDx,15x100 Triplt 10/pk R
    SKU: J330-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 20 PACKS Section I: TSA - For the cultivation of microorganisms. Section II: Cetrimide - For the selective isolation of Pseudomonas aeruginosa. Section III: MSA - For the selctive isolation and differentiation of Staphylococcus spp. (10 per PK)
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    was $67.69 Special Price $54.30
  14. Lactose Broth, 225ml; HDx, 500ml PC bottle R
    SKU: U145-PK
    Manufacturer: Hardy Diagnostics
    Lactose Broth, 225ml, 500ml polycarbonate bottle, order by the package of 10, by Hardy Diagnostics For the cultivation of coliforms and Salmonella spp. in water, food, dairy, and pharmaceutical products. Single strength. (10 per PK)
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    was $177.13 Special Price $142.08
  15. Nitrate Substrate Broth; HDx, 13x100mm tube
    SKU: R97-PK
    Manufacturer: Hardy Diagnostics
    Nitrate Substrate Broth, 2.0ml, 13x100mm tube, optically clear, glass tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS For the determination of nitrate reactions of mycobacteria. Use with AFB nitrate reagents (cat. no. Z124 and Z125) Comparable to: Remel R061548 (20 per PK)
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    was $81.57 Special Price $65.43
  16. SC minus Adenine,Histidin; HDx,15x100mm plt 10/pk *R
    SKU: G425-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Agar (TSA) with Lecithin and Tween®, USP is recommended for use as a general growth medium for establishing microbiological trends, alerts, and activity levels in biologically controlled environments. The medium is based on Soybean-Casein Digest Agar and is formulated according to the United States Pharmacopoeia (USP) <62> and meets the required USP performance specifications. Lecithin and Tween neutralize most disinfectants and help to revive damaged microorganisms. Features and Benefits: Optically clear polystyrene For distortion free viewing. Heavy-Duty Reduces breakage during shipping. Stacking rings Polystyrene Petri plates feature raised rings for stacking ability and prevents sliding. Breathable Packaging Packaged in sleeves of 10 plates in a "breathable" bag that prevents buildup of condensation and excess moisture. (10 per PK)
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    was $46.01 Special Price $36.91
  17. LB Agar, Lennox; HDx,15x100mm plt 10/pk *R
    SKU: G77-PK
    Manufacturer: Hardy Diagnostics
    CulGenex™ LB Agar, Lennox Media is recommended for the cultivation of recombinant Escherichia coli strains used in phage production and in molecular studies. All CulGenex products are offered exclusively through VWR. Comparable to: BD 298273 (10 per PK)
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    was $36.99 Special Price $29.66
  18. MIL Medium; HDx, 16x100mm tube
    SKU: Q09-PK
    Manufacturer: Hardy Diagnostics
    MIL (Motility, Indole, Lysine deaminase, and decarboxylase) Medium, 8ml, 16x100mm tube, order by the package of 20, by Hardy Diagnostics For the determination of motility, indole, lysine deamination, and lysine decarboxylation of gram negative bacilli. Comparable to: Remel R061350 (20 per PK)
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    was $84.62 Special Price $67.87
  19. Middlebrook 7H11, Selecti; HDx, plstc HardyFlask * R
    SKU: X28-PK
    Manufacturer: Hardy Diagnostics
    Middlebrook 7H11 Selective, 12ml, 50ml plastic HardyFlask™, order by the package of 20, by Hardy Diagnostics Middlebrook 7H11 Agar is recommended for use in the isolation and cultivation of Mycobacterium species. HardyFlask™ Features: Lightweight For reduced shipping cost and less chance of breakage. Stackable For increased conservation of space, both in incubator and refrigerator. No special storage racks are needed. Interlocking For increased stability when incubating and transporting. Large surface area For the inoculum. Almost double the area! better isolation of colonies. Slanted neck Facilitates easy inoculation of the flat media surface. Improved clarity For better visibility of the growing culture, both front and back. (20 per PK)
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    was $125.80 Special Price $100.91
  20. Violet Red Bile Agar; HDx,125ml PC btl,100ml R
    SKU: U96-PK
    Manufacturer: Hardy Diagnostics
    Violet Red Bile Agar, 100ml, 6 ounce glass bottle, order by the package of 16, by Hardy Diagnostics For the detection and enumeration of coliforms in food, water, and dairy products. (16 per PK)
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    was $361.27 Special Price $289.77
  21. MacConkey Broth w/DT, 5ml; HDx, 13x100mm glass R
    SKU: K194-PK
    Manufacturer: Hardy Diagnostics
    MacConkey Broth with Durham Tube, 5ml, 13x100mm glass tube, optically clear, shatter resistant, polycarbonate tube, order by the package of 20, by Hardy Diagnostics For the detection of gram-negative, lactose fermenting bacilli. Contains a durham tube for gas detection. (20 per PK)
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    was $60.41 Special Price $48.45
  22. BG Sulfa Agar; HDx, 15x100mm plate R
    SKU: G87-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS (Brilliant Green Sulfa Agar with sulfapyridine 10mg/L) For the selective isolation of Salmonella spp. Comparable to: BD 271710 (10 per PK)
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    was $80.78 Special Price $64.80
  23. LB Agar, Lennox w/Amp; HDx, 15x100mm plate * R
    SKU: G79-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS (Lennox formulation with Ampicillin 30mcg/ml) For the cultivation of E. coli used in phage production and molecular genetic studies. (10 per PK)
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    was $55.10 Special Price $44.18
  24. Lowenstein Jensen w/Iron; HDx, plstc HardyFlask R
    SKU: X21-PK
    Manufacturer: Hardy Diagnostics
    LJ (Lowenstein Jensen) with Ferric Ammonium Citrate, 50ml plastic HardyFlask™, order by the package of 20, by Hardy Diagnostics (Lowenstein Jensen with Ferric Ammonium Citrate) For the cultivation of Mycobacterium spp. HardyFlask™ Features: Lightweight For reduced shipping cost and less chance of breakage. Stackable For increased conservation of space, both in incubator and refrigerator. No special storage racks are needed. Interlocking For increased stability when incubating and transporting. Large surface area For the inoculum. Almost double the area! better isolation of colonies. Slanted neck Facilitates easy inoculation of the flat media surface. Improved clarity For better visibility of the growing culture, both front and back. (20 per PK)
    Learn More
    was $109.11 Special Price $87.52
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