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. HardyCHROM O157; HDx, 15x100mm plt 10/pk R
    SKU: G305-PK
    Manufacturer: Hardy Diagnostics
    HardyCHROM™ O157 is a selective and differential medium recommended for the isolation of enterohemorrhagic E. coli O157 from food and environmental sources. Chromogenic substances in the media facilitate detection by colony color. Not for human diagnostic use. Features & Benefits: HardyCHROM™ O157 provides an initial screen intended to isolate colonies for further testing. Confirm isolated purple-pink colonies with a latex aggulation test(Cat. no. PL070HD), antisera (Cat. no. M12030), or other test methods for complete identification. This media is to be stored and incubated in the dark. If you have a light in your refrigerator, incubator, or you leave the media exposed to light on the bench top, Hardy Diagnostics offers free Blok-Boxes. Blok-Box is a reusable cardboard box that holds one sleeve of ten petri plates. Comparable to: BD D214984 (10 per PK)
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    was $37.83 Special Price $30.35
  2. Nutrient Agar 1.5%; HDx,15x100mm plt 10/pk R
    SKU: W68-PK
    Manufacturer: Hardy Diagnostics
    Nutrient Agar 1.5%, 15x100mm plate, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS A general purpose growth medium recommended for use in the isolation and cultivation of nonfastidious microorganisms. (10 per PK)
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    was $44.04 Special Price $35.32
  3. Saline,0.9% w/Tween, 9ml; HDx, 16x125m tube *
    SKU: K123-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS (0.9% NaCl with 0.5% Tween 80) For preparing dilutions and suspensions of microorganisms. Comparable to: BD 215128 (20 per PK)
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    was $93.02 Special Price $74.61
  4. Transgrow; HDx, plstc HardyFlask R
    SKU: X52-PK
    Manufacturer: Hardy Diagnostics
    Transgrow, 12ml, 50ml plastic HardyFlask™, for N. gonorrhoeae, includes CO2, order by the package of 20, by Hardy Diagnostics Modified Martin Lewis is a selective medium used in qualitative procedures for the isolation of Neisseria gonorrhoeae with suppression of most other gram-negative diplococci, gram-negative bacilli, gram-positive organisms and yeast. 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 $127.22 Special Price $102.04
  5. BHI Agar Slant; HDx, 20x125mm tube
    SKU: L35-PK
    Manufacturer: Hardy Diagnostics
    BHI (Brain Heart Infusion) Agar Slant, 20x125mm tube, order by the package of 20, by Hardy Diagnostics (Brain Heart Infusion Agar) For the cultivation of microorganisms. Comparable to: Remel R060232 (20 per PK)
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    was $86.07 Special Price $69.04
  6. Phosphate Buffer, 40ml; HDx, 2oz PP Bottle
    SKU: X43-PK
    Manufacturer: Hardy Diagnostics
    Phosphate Buffer, 40ml fill, 60ml polypropylene bottle, order by the package of 25, by Hardy Diagnostics For the preparation of specimens for AFB culture and other applications. 0.067M, pH 6.8. Sputum decontamination reagents are used to break down mucous components of sputum and other clinical specimens and to decontaminate the specimen of normal flora in order to allow slower growing mycobacteria to grow. Our bottle features: Heavy duty Bottles are tough and sturdy to reduce breakage. Leak-Proof Secure tight lid ensures product integrity. Optically clear Bottles are made of clarified polypropylene for clear viewing. Robust construction Bottles have excellent impact and chemical resistance. (25 per PK)
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    was $164.18 Special Price $131.69
  7. Fluid A, USP, 1L; HDx, 1L PC Bottle
    SKU: U208-PK
    Manufacturer: Hardy Diagnostics
    Fluid A, USP, 1L polycarbonate bottle, order by the package of 10, by Hardy Diagnostics A rinsing and diluting fluid for use in USP testing protocols. Contains peptone 0.1%. Hardy Diagnostics' sterility media and rinse solutions are manufactured in an ISO 13485 environmentally controlled production center. Each lot is certified for pH, sterility and growth promotion using ATCC® strains specified by the USP. Our approach to manufacturing ensures all sterility media and rinse fluids provide the highest level of clarity for improved reading accuracy, thus significantly reducing the risk of incorrect interpretation and false results. Comparable to: BD 299111 (10 per PK)
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    was $271.23 Special Price $217.54
  8. Peptone, Powder, 1 Kilograms CAS# 73049-73-7
    Manufacturer: Research Products International
    Dimensions: 4.88 x 7.25 x 4.88, Weight: 2.42, Cas#: 73049-73-7 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $132.80
  9. Moellrs Ornithine Decarb.; HDx,16x125mm tube,brth
    SKU: Y44-PK
    Manufacturer: Hardy Diagnostics
    Moeller's Ornithine Decarboxylase, 5ml, 16x125mm tube, broth, order by the package of 20, by Hardy Diagnostics For the differentiation of gram negative enteric bacilli based on the decarboxylation reaction of amino acids. Comparable to: Remel R060764 (20 per PK)
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    was $88.54 Special Price $71.02
  10. LB Agar, Low Salt Formula, Powder, Lennox L Agar, 100 Grams CAS# 91079-40-2, 8013-01-2, 7647-14-5, 9002-18-0
    Manufacturer: Research Products International
    Dimensions: 3.50 x 3.75 x 3.50, Weight: 0.32, Cas#: 91079-40-2, 8013-01-2, 7647-14-5, 9002-18-0 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $33.50
  11. Inoculating loops, 10ul, flexible PP, 25/sterile peel, 40 peels/pack, 1000/cs
    Manufacturer: MTC Bio
    Inoculating loops, 10ul, flexible PP, 25/sterile peel, 40 peels/pack, 1000/cs (6000 per CS )
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    was $515.88 Special Price $354.98
  12. Butterflds Phos Buf 400ml; HDx, 500ml PC bottle
    SKU: U154-PK
    Manufacturer: Hardy Diagnostics
    Butterfield's Phosphate Buffer 400ml, 500ml polycarbonate bottle, order by the package of 10, by Hardy Diagnostics (Butterfield's Phosphate Buffer, pH: 7.2) For the preparation of dilutions for plate count and other laboratory tests. (10 per PK)
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    was $276.00 Special Price $221.37
  13. Blood Agar, 5%, 30ml; HDx, Nalgene Omniplate R
    SKU: A127-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Agar (TSA) is a nutritious base to which a variety of supplements can be added. It is recommended for use as a general growth medium for the isolation and cultivation of microorganisms. With the addition of 5% sheep blood, it also provides an excellent medium which allows the growth of yeast species, staphylococci, enterococci and gram-negative bacilli (10 per PK)
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    was $251.29 Special Price $201.56
  14. Barney Miller Medium; HDx, 15x60mm plate * R
    SKU: G93-PK
    Manufacturer: Hardy Diagnostics
    Beer Testing Media are used for the detection of beer spoilage microorganisms and for the cultivation and enumeration of bacteria and yeast encountered in the brewing industry. This product is not intended to be used for the diagnosis of human disease. 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 $22.73 Special Price $18.23
  15. BHI Agar w/Blood Slant; HDx, 20x125mm tube R
    SKU: L31-PK
    Manufacturer: Hardy Diagnostics
    BHI (Brain Heart Infusion) Agar with Blood Slant, 20x125mm tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS (Brain Heart Infusion Agar with 5% Sheep Blood) For the cultivation of fungi. Comparable to: Remel R08066 (20 per PK)
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    was $105.87 Special Price $84.92
  16. Swabcheck Listeria 25/Pk
    Manufacturer: GVS North America
    Swabcheck Listeria 25/Pk (25 per PK )
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    was $380.96 Special Price $305.56
  17. TSB, Filtered, 1ml; HDx, 13x100mm glass *R
    SKU: K85-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), filtered to remove dead bacteria, 1ml, 13x100mm glass, optically clear, glass tube, order by the package of 20, by Hardy Diagnostics (Tryptic Soy Broth) Filtered to remove non-viable organisms. Comparable to: Remel R064880 (20 per PK)
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    was $84.93 Special Price $68.12
  18. Tryptone, Powder, 500 Grams CAS# 91079-40-2
    Manufacturer: Research Products International
    Dimensions: 3.50 x 7.00 x 3.50, Weight: 1.23, Cas#: 91079-40-2 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $92.25
  19. BHI Broth w/5% Fildes10ml; HDx, 16x125mm tube R
    SKU: K08-PK
    Manufacturer: Hardy Diagnostics
    (Brain Heart Infusion with 5% Fildes Solution) For the cultivation of fastidious bacteria. (20 per PK)
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    was $118.26 Special Price $94.85
  20. Universal Beer Ag w/Cyclo; HDx, 15x60mm plate R
    SKU: G182-PK
    Manufacturer: Hardy Diagnostics
    For the selective isolation and cultivation of microorganisms significant in the brewing industry. (10 per PK)
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    was $101.09 Special Price $81.08
  21. Butterflds Phos.Buf,9.9ml; HDx, 16x125mm tube
    SKU: K208-PK
    Manufacturer: Hardy Diagnostics
    Butterfield's Phosphate Buffer, 9.9ml fill, 16x125mm tube, order by the package of 20, by Hardy Diagnostics (Butterfield's Phosphate Buffer, pH: 7.2) For the preparation of dilutions for plate count and other laboratory tests (20 per PK)
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    was $92.22 Special Price $73.96
  22. Sabdex Broth; HDx, 16x125mm tube
    SKU: K54-PK
    Manufacturer: Hardy Diagnostics
    Sabdex (Sabouraud Dextrose) Broth, 10ml, 16x125mm tube, order by the package of 20, by Hardy Diagnostics For the cultivation of fungi. Comparable to: BD 221014 (20 per PK)
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    was $51.89 Special Price $41.62
  23. TSA, USP, 400ml; HDx, 16 oz glass btl BR
    SKU: U360-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Agar (TSA), USP, 400ml, 16 ounce glass bottle, order by the package of 12, by Hardy Diagnostics For use as a general growth medium for the isolation and cultivation of microorganisms. This medium is also recommended for use in the cultivation, storage, maintenance, and transportation of pure cultures of microorganisms. (12 per PK)
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    was $209.58 Special Price $168.11
  24. MR-VP Broth, 5ml; HDx, 13x100mm glass
    SKU: K37-PK
    Manufacturer: Hardy Diagnostics
    MR-VP (Methyl Red - Voges Proskauer) Broth, 5ml, 13x100mm glass tube, optically clear, glass tube, order by the package of 20, by Hardy Diagnostics (Methyl Red and Voges-Proskauer) For the identification of gram-negative bacilli. Comparable to: BD 211383 (20 per PK)
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    was $78.73 Special Price $63.15
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