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. Orange Serum Agar; HDx, 15x60mm plate R
    SKU: G91-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS For the cultivation and enumeration of aciduric bacteria and fungi by membrane filtration methods. (10 per PK)
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    was $53.70 Special Price $43.08
  2. Sabdex Agar Slant; HDx, 20x125mm tube
    SKU: L40-PK
    Manufacturer: Hardy Diagnostics
    Sabdex (Sabouraud Dextrose) Agar Slant, 10ml, 20x125mm tube, order by the package of 20, by Hardy Diagnostics (Sabourauds Dextrose Agar) For the cultivation of fungi. Comparable to: BD 297649 (20 per PK)
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    was $55.42 Special Price $44.45
  3. Chocolate Agar; HDx, 15x150mm plate, R
    SKU: H25-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS (GC Agar Base with 1% hemoglobin and enrichments) For the cultivation of fastidious bacteria. Comparable to: Remel R04030 (10 per PK)
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    was $86.31 Special Price $69.23
  4. TAT Broth, 99ml; HDx, 4oz BostonRnd Btl
    SKU: U78-PK
    Manufacturer: Hardy Diagnostics
    TAT Broth, 99ml, 4 ounce boston round bottle, order by the package of 20, by Hardy Diagnostics For the detection of microorganisms from topical drugs, cosmetics, and other viscous materials. (20 per PK)
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    was $179.53 Special Price $144.00
  5. Trichophyton #4; HDx, 20x125mm tube R
    SKU: C54-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS For the differentiation and identification of Trichophyton spp. Comparable to: BD 296246 (20 per PK)
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    was $106.63 Special Price $85.53
  6. D/E Neutralizng Brth,10ml; HDx, 16x125mm tube R
    SKU: K108-PK
    Manufacturer: Hardy Diagnostics
    For neutralizing and evaluating the efficacy of antiseptics and disinfectants. Comparable to: Remel R09334 (20 per PK)
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    was $67.31 Special Price $53.99
  7. Choc./Martin Lewis w/Lin; HDx, 15x100mm biplate R
    SKU: J44-PK
    Manufacturer: Hardy Diagnostics
    (Chocolate Agar / Martin Lewis with Lincomycin) For the cultivation and isolation of Neisseria gonorrhoeae. (10 per PK)
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    was $81.74 Special Price $65.56
  8. Sabdex Agar w/G & C; HDx, 15x60mm plate * R
    SKU: G159-PK
    Manufacturer: Hardy Diagnostics
    For the selective cultivation of fungi and dermatophytes (10 per PK)
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    was $27.62 Special Price $22.16
  9. TSB, 2ml; HDx, 13x100mm glass
    SKU: K131-PK
    Manufacturer: Hardy Diagnostics
    (Tryptic Soy Broth) For sterility testing and cultivation of microorganisms. Also known as Soybean-Casein Digest Broth, USP. Comparable to: Remel R064890 (20 per PK)
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    was $117.09 Special Price $93.91
  10. Butterflds Phos.Buf 225ml; HDx, 500ml PC WM bottle
    SKU: U123-PK
    Manufacturer: Hardy Diagnostics
    Butterfield's Phosphate Buffer, 225ml fill, 500ml polycarbonate wide mouth bottle with cap, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS (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 $186.18 Special Price $149.33
  11. Casein Agar; HDx, 15x100mm plt * R
    SKU: G122-PK
    Manufacturer: Hardy Diagnostics
    For the differentiation of aerobic actinomycetes based on casein proteolysis. Organisms that can hydrolyse casein, such as Streptomyces, Pseudomonas, and Actinomadura spp. Will produce a clear halo in the surrounding medium. (10 per PK)
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    was $94.02 Special Price $75.41
  12. TB Base Digestant, 100ml; HDx, 125ml HDPE bottle
    SKU: U22-PK
    Manufacturer: Hardy Diagnostics
    B Base Digestant, 100ml fill, 125ml HDPE bottle, order by the package of 12, by Hardy Diagnostics For the processing of specimens for AFB culture. Add NALC (cat. no. Z60) upon use. (12 per PK)
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    was $115.42 Special Price $92.58
  13. Campy Thioglycollate; HDx, 16x100mm glass ,R
    SKU: K128-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS For the selective isolation of Campylobacter spp. from stool specimens. Contains five selective antimicrobials. Comparable to: Remel R060372 (20 per PK)
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    was $116.91 Special Price $93.78
  14. Bovine Selective Strep; HDx, 15x100mm plt 10/pk R
    SKU: A143-PK
    Manufacturer: Hardy Diagnostics
    For the selective isolation of Streptococcus species from bovine mastitis specimens. (10 per PK)
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    was $45.31 Special Price $36.34
  15. TB Base Digestant, 500ml; HDx, 500ml PP bottle
    SKU: U20-EA
    Manufacturer: Hardy Diagnostics
    Phosphate Buffered Saline (PBS) with 0.3% Tween® 20, 500ml, 500ml polycarbonate bottle, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS Phosphate Buffered Saline (PBS) with 0.3% Tween® 20 is used during specimen processing for recovery of bacterial spores. It is recommended to be used specifically for environmental sampling. This product is not intended to be used for the diagnosis of human disease. (1 per EA)
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    was $21.91 Special Price $17.58
  16. BHI Agar; HDx, plstc HardyFlask
    SKU: X10-PK
    Manufacturer: Hardy Diagnostics
    CTA (Cystine Tryptic Agar) with Lactose, 3ml, 13x100mm tube, optically clear, glass tube, order by the package of 20, by Hardy Diagnostics (Cystine Tryptic Agar with Carbohydrates) For fermentation testing of fastidious bacteria, such as Neisseria spp. Comparable to: Remel R060616 (20 per PK)
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    was $110.44 Special Price $88.58
  17. Todd Hewitt Broth, 1ml; HDx, 13x100mm tube R
    SKU: K112-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS For the cultivation of Streptococcus spp. for serological typing. (20 per PK)
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    was $125.53 Special Price $100.68
  18. Trehalose Ferm.Brth, 5ml; HDx,13x100mm w/DurhmTb, R
    SKU: Y205-PK
    Manufacturer: Hardy Diagnostics
    Trehalose Fermentation Broth, 5ml, 13x100mm with glass durham tube, order by the package of 20, by Hardy Diagnostics For the determination of fermentation reactions in yeasts. When incubated at 42 deg. C aids in the identification of Candida glabrata. (20 per PK)
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    was $292.42 Special Price $234.55
  19. SabDex Agar w/L&T18mlDeep; HDx, 20x125mm tube R
    SKU: Q75-PK
    Manufacturer: Hardy Diagnostics
    Sabdex (Sabouraud Dextrose) Agar with Lecithin and Tween® 80, Deep, 20x125mm pour tube, order by the package of 20, by Hardy Diagnostics For the isolation and cultivation of fungi and the neutralization of disinfectants. Germicidal or disinfectant residue is neutralized by the addition of lecithin and Tween® 80. Neutralization of these residues reduces their inhibitory effect which would ultimately result in the lowering of the microbial count. Quaternary ammonia compounds are neutralized by lecithin while phenolic disinfectants and hexachlorophene are neutralized by Tween® 80. Together, lecithin and Tween® 80 neutralize ethanol. (20 per PK)
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    was $149.09 Special Price $119.58
  20. Trichophyton #3; HDx, 20x125mm tube R
    SKU: C53-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS For the differentiation and identification of Trichophyton spp. Comparable to: BD 296245 (20 per PK)
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    was $127.13 Special Price $101.97
  21. Motility Nitrate; HDx, 13x100mm tube, R
    SKU: Y23-PK
    Manufacturer: Hardy Diagnostics
    Motility Nitrate, 3ml, 13x100mm tube, order by the package of 20, by Hardy Diagnostics For the detection of motility and nitrate reduction of non-fermentative bacilli. (20 per PK)
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    was $116.62 Special Price $93.53
  22. Standard Method Agr w/L&T; HDx,15x65mm Contct Plt R
    SKU: P51-PK
    Manufacturer: Hardy Diagnostics
    Standard Methods Agar with Lecithin and Tween® 80, contact plate with Lok-Tight™ friction lid, optional locking feature, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS Added measure to assure sterility in your environmental monitoring program! Hardy Diagnostics contact plates are recommended for use in the cultivation of microorganisms from environmental surfaces. Standard Methods Agar (Plate Count Agar/Tryptone Glucose Yeast "TGY" Agar) is recommended for use in determining the microbial content in dairy products, food, water samples, and other material of sanitary importance. 3 Easy Steps: 1. Remove lid. 2. Gently press plate to surface without twisting or sliding. 3. Twist clockwise until frosted bands line up to lock lid into place. Our Contact Plate features: Friction lid The friction lid design keeps lids in place before sampling. Lok-Tight™ Locking Lid An optional locking feature means lids stay secured post sampling and during transport to your lab. Molded Grid Each plate has a grid molded into the bottom of the plate to aid in the counting of microorganisms. Certificate of Analysis Available online for each lot. (10 per PK)
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    was $54.68 Special Price $43.85
  23. Cetrimide/MAC/VJ; HDx,15x100 Triplt 10/pk R
    SKU: J314-PK
    Manufacturer: Hardy Diagnostics
    Section I: Cetrimide Selective Agar is recommended for the selective isolation and identification of Pseudomonas aeruginosa. Section II: 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. Section III: Vogel and Johnson Agar is a selective medium used for the detection of coagulase-positive, mannitol-positive Staphylococcus aureus strains in clinical specimens and foods. (10 per PK)
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    was $39.12 Special Price $31.38
  24. Standard Methods Agar; HDx, 4oz glass btl, 100ml
    SKU: U95-PK
    Manufacturer: Hardy Diagnostics
    Standard Methods Agar (Plate Count Agar/Tryptone Glucose Yeast (TGY) Agar), 4 ounce glass bottle, 100ml, order by the package of 20, by Hardy Diagnostics (Plate Count Agar) For the cultivation and enumeration of microorganisms in dairy products, food, and water. (20 per PK)
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    was $148.86 Special Price $119.40
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