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. Inoculating Needle/Loops 10uL Flexible, Sterile pk1000, Blue
    Manufacturer: Heathrow Scientific
    Inoculating Needle/Loops 10uL Flexible, Sterile pk1000, Blue (1000 per PK )
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    was $79.33 Special Price $69.70
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. Inoculation Loop, Rigid, 10uL & 1uL, with Calibration Certificate, STERILE, White, Individually Wrapped
    SKU: 2850-CS
    Manufacturer: Globe Scientific
    Inoculation Loop, Rigid, 10uL & 1uL, with Calibration Certificate, STERILE, White, Individually Wrapped, CS500 (5000 per CS)
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    was $2,011.60 Special Price $1,466.79
  8. Inoculation Loop, Rigid, 10uL & 1uL, with Calibration Certificate, STERILE, White, 20/Peel Pack, 25 Packs/Unit
    SKU: 2810-CS
    Manufacturer: Globe Scientific
    Inoculation Loop, Rigid, 10uL & 1uL, with Calibration Certificate, STERILE, White, 20/Peel Pack, 25 Packs/Unit, PK500, CS6000 (6000 per CS)
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    was $895.00 Special Price $652.61
  9. 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
  10. 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
  11. 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
  12. United Scientific™ InocuLating Loops, 1uL, White, Pk/30
    Manufacturer: United Scientific Supplies
    Disposable economical plastic loops for use when flame sterilization is not needed. Overall length is 8.75". Sterilized and packed in a plastic bag. (30 per PK )
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    was $5.85 Special Price $3.83
  13. 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
  14. 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
  15. LevGo® smartPick™ Wooden Inoculation Pick, mini
    Manufacturer: LevGo
    Fits 1.5ml tube (lid closed), 1.28in. 32.5mm, Made in USA (2000 per CS )
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    was $1,580.68 Special Price $1,055.66
  16. United Scientific™ Inoculating Loops, Set Of 4
    Manufacturer: United Scientific Supplies
    Pack of four inoculating loops designed with an 8" long solid brass handle and insulated grip. The non-calibrated 26 gauge nickel-chromium wire loop is approximately 8mm in diameter. Handles are color-coded for easy identification. (1 per EA )
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    was $20.55 Special Price $14.97
  17. 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
  18. 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
  19. 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
  20. LevGo® smartPick™ Wooden Inoculation Pick, mini
    Manufacturer: LevGo
    Fits 1.5ml tube (lid closed), 1.28in. 32.5mm, Made in USA (10 per PK )
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    was $90.89 Special Price $52.78
  21. Swab Neutral Buf 4ml 125/Pk
    Manufacturer: GVS North America
    Swab Neutral Buf 4ml 125/Pk (125 per PK )
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    was $824.42 Special Price $661.26
  22. Swabcheck Hygiene 25/Pk
    Manufacturer: GVS North America
    Swabcheck Hygiene 25/Pk (25 per PK )
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    was $353.82 Special Price $283.79
  23. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Butterfield’S Solution
    Manufacturer: GVS North America
    ENVIRONMENTAL SURFACE COLLECTION KIT, 10ML TRANSPORT TUBE WITH 10ML BUTTERFIELD’S SOLUTION AND 1PC FOAM SWAB (400 per CS )
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    was $775.13 Special Price $621.72
  24. LB Broth Powder, Lennox L Broth, 500 Grams
    Manufacturer: Research Products International
    Dimensions: 3.50 x 7.00 x 3.50 Weight: 1.24 - Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $71.80
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