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. RTF Agar; HDx, 15x100mm plate R
    SKU: A68-PK
    Manufacturer: Hardy Diagnostics
    RTF Modified Casman Agar, for the cultivation and differentiation of fastidious microorganisms, especially Haemophilus spp., a sub for rabbit and/or horse blood, 15x100mm plate, order by the package of 10, by Hardy Diagnostics (10 per PK)
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    was $70.90 Special Price $56.86
  2. Fluid Thio, 150ml, USP; HDx, 200ml Serum Bottle
    SKU: U207-PK
    Manufacturer: Hardy Diagnostics
    Fluid Thioglycollate, USP, 150ml, in a 200ml serum vial with needle-port septum order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS (Thioglycollate Broth with Resazurin Oxygen Indicator) For the cultivation of microorganisms and USP sterility procedures. (10 per PK)
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    was $281.26 Special Price $225.59
  3. Buf. Peptone Water, 400ml; HDx, 500ml PC bottle
    SKU: U143-PK
    Manufacturer: Hardy Diagnostics
    Buffered Peptone Water, 400ml, 500ml polycarbonate bottle, order by the package of 10, by Hardy Diagnostics A preenrichment used for increasing the recovery of injured Salmonella spp. from food and other specimens prior to selective enrichment and isolation. (10 per PK)
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    was $198.15 Special Price $158.93
  4. PBS, Phos Buf Sal, 9.9ml; HDx,pH7.5,16x125mm tube
    SKU: K163-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS Hardy Diagnostics Phosphate Buffered Saline (pH of 7.5) is recommended as a diluent for quantitative culturing or as a rinsing agent in microbiological, immunological, histological and molecular testing procedures. (20 per PK)
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    was $90.64 Special Price $72.70
  5. Rose Bengal Agr w/Chloram; HDx,15x65mm Contct Plt R
    SKU: P42-PK
    Manufacturer: Hardy Diagnostics
    Rose Bengal Agar with Chloramphenicol, 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. Rose Bengal Agar with Chloramphenicol is recommended for the selective isolation and enumeration of fungi from environmental and food sources. 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 $40.37 Special Price $32.37
  6. LB Agar w/Carbenicillin; HDx,15x100mm plt 10/pk R
    SKU: G403-PK
    Manufacturer: Hardy Diagnostics
    LB Agar Media formulations are recommended for the cultivation of bacteria used in molecular biology studies. 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. All CulGenex products are offered exclusively through VWR. (10 per PK)
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    was $43.16 Special Price $34.61
  7. TSB, 3ml; HDx, 13x100mm tube
    SKU: R41-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), 3ml, 13x100mm tube, optically clear, glass tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS (Tryptic Soy Broth) For sterility testing and cultivation of microorganisms. Also known as Soybean-Casein Digest Broth. (20 per PK)
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    was $96.25 Special Price $77.21
  8. GN Broth; HDx, 13X100mm tube
    SKU: K01-PK
    Manufacturer: Hardy Diagnostics
    For the selective enrichment of Salmonella and Shigella spp. in stool specimens. (20 per PK)
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    was $83.07 Special Price $66.63
  9. Bile Esculin Azide Broth; HDx, 13x100mm tube
    SKU: K11-PK
    Manufacturer: Hardy Diagnostics
    For the detection of group D streptococci including enterococci. Inhibits gram-negative bacteria. Comparable to: Remel R060302 (20 per PK)
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    was $88.11 Special Price $70.68
  10. LKV Agar PK10
    SKU: A60-PK
    Manufacturer: Hardy Diagnostics
    (Brucella Agar with Laked Sheep Blood, Kanamycin, Vancomycin, Hemin and Vitamin K) For the selective isolation of gram negative anaerobic bacteria, especially Bacteroides spp. Comparable to: Remel R01042 (10 per PK)
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    was $22.32 Special Price $17.91
  11. PBS,Phos Buffer Sal, 1L; HDx,pH7.5, 1L PC btl
    SKU: U138-PK
    Manufacturer: Hardy Diagnostics
    Phosphate Buffered Saline (PBS), 1 liter, pH 7.5, 1 liter polycarbonate bottle, order by the package of 10, by Hardy Diagnostics Hardy Diagnostics Phosphate Buffered Saline (pH of 7.5) is recommended as a diluent for quantitative culturing or as a rinsing agent in microbiological, immunological, histological and molecular testing procedures. (10 per PK)
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    was $265.57 Special Price $213.00
  12. 2XYT Broth, Capsules, 496 Grams of Powder in 32 Total Capsules per Bottle CAS# 91079-40-2; 8013-01-2; 7647-14-5
    Manufacturer: Research Products International
    Dimensions: 5.00 x 6.00 x 5.00, Weight: 1.41, Cas#: 91079-40-2; 8013-01-2; 7647-14-5 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $132.80
  13. Agar, Bacteriological Grade, 5 Kilograms CAS# 9002-18-0
    Manufacturer: Research Products International
    Dimensions: 10X7.5X10, Weight: 12.4, Cas#: 9002-18-0 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $1,121.70
  14. YPD Broth, 1 Gram Capsules, 500 Grams
    Manufacturer: Research Products International
    Dimensions: 5.00 x 6.00 x 5.00 Weight: 1.5 - Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $169.70
  15. Luria Broth 1 Liter Buffered Capsules [Miller's LB Broth], 20 Capsules of 25 Grams, 500 Grams
    Manufacturer: Research Products International
    Dimensions: 5.00 x 6.00 x 5.00 Weight: 1.77 - Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $118.65
  16. D/E Neutralizing Broth; HDx,180mL WM jar,90ml R
    SKU: U75-PK
    Manufacturer: Hardy Diagnostics
    D/E Neutralizing Broth, 180ml wide mouth bottle, 90ml, order by the package of 12, by Hardy Diagnostics D/E Neutralizing Broth is utilized to neutralize antiseptics and disinfectants as well as to detect organisms remaining after treatment. This broth is especially suited for environmental sampling where neutralization of the chemical is important to determining the bactericidal activity. Bottle Features: Heavy Duty These bottles are made of tough and sturdy polycarbonate, to reduce breakage Leak-Proof Easy-to-remove, perforated, shrink wrap ensures product integrity Optically Clear Bottles are made of clarified polycarbonate for clear viewing (12 per PK)
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    was $104.56 Special Price $83.87
  17. Mycoplasma Agar; HDx,15x100 plt w/o labl R
    SKU: G102-PK
    Manufacturer: Hardy Diagnostics
    Mycoplasma Media is recommended for use in isolation of Mycoplasma species associated with bovine mastitis. (10 per PK)
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    was $25.11 Special Price $20.14
  18. 1ul Inoculating Loop, Blue, Individually Wrapped, sterile 400/pk, 4000/cs
    Manufacturer: Nest Scientific
    1ul Inoculating Loop, Blue, Individually Wrapped, sterile 400/pk, 4000/cs (4000 per CS )
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    $361.78
  19. AK #2 Agar, 200ml; HDx, 8oz glass bottle
    SKU: U189-PK
    Manufacturer: Hardy Diagnostics
    AK #2 Agar, 200ml, 8oz glass bottle, order by the package of 12, by Hardy Diagnostics MINIMUM ORDER: 3 PACKS For preparation of spore suspensions used to detect antibiotic residues (such as penicillin and sulfa drugs) in milk and dairy products. (12 per PK)
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    was $281.80 Special Price $226.02
  20. Fluid Thio Med, USP 100ml; HDx, 4oz BR w/cap
    SKU: U121-PK
    Manufacturer: Hardy Diagnostics
    Fluid Thioglycollate, USP, 100ml fill, 4oz glass boston round bottle with cap, order by the package of 20, by Hardy Diagnostics Fluid Thioglycollate Medium (FTM), is recommended for the use of of detecting microorganisms in sterile materials and USP sterility procedures. (20 per PK)
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    was $199.21 Special Price $159.79
  21. StrepPro Extraction Rgt 2 HDx, 60 tests EA 1
    Manufacturer: Hardy Diagnostics
    StrepPRO™ Extraction Reagent 2, for the rapid latex agglutination test, 60 tests, by Hardy Diagnostics Extraction 2 Reagent for the rapid latex agglutination test for the identification of streptococcal groups. Comparable to: Remel R62057 (1 per EA)
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    was $70.29 Special Price $56.37
  22. Luria Broth 1 Liter Buffered Capsules [Miller's LB Broth], 40 Capsules of 25 Grams, 1 Kilogram
    Manufacturer: Research Products International
    Dimensions: 5.00 x 10.00 x 5.00 Weight: 2.8 - Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $215.95
  23. Czapek Dox Agar; HDx 15x100mm R
    SKU: W119-PK
    Manufacturer: Hardy Diagnostics
    Czapek Dox Agar, deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics >MINIMUM ORDER: 10 PACKS For the cultivation of saprophytic fungi and soil bacteria capable of utilizing inorganic nitrogen. Neutral pH. (10 per PK)
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    was $65.81 Special Price $52.77
  24. Mueller Hinton Agr w/Choc; HDx, 15x100mm plate R
    SKU: E20-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS (Mueller Hinton Agar with supplements and 1% hemoglobin) For the cultivation of fastidious microorganisms. Comparable to: Remel R04059 (10 per PK)
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    was $76.22 Special Price $61.13
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