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. Moellrs Lysine Decarb.; HDx,16x125mm tube,brth
    SKU: Y43-PK
    Manufacturer: Hardy Diagnostics
    Moeller's Lysine Decarboxylase, 5ml fill, 16x125mm tube, 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 R060760 (20 per PK)
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    was $83.11 Special Price $66.66
  2. Water w/Tween, 24ml; HDx, 20x125mm tube
    SKU: V25-PK
    Manufacturer: Hardy Diagnostics
    Water with Tween® 80, 24ml fill, 20x125mm tube, order by the package of 20, by Hardy Diagnostics (Deionized water with Tween 80, 0.02%) For preparing dilutions for MIC procedures. Comparable to: Remel R14503 (20 per PK)
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    was $77.87 Special Price $62.46
  3. Middlebrook 7H11/7H11 Sel; HDx, 15x100mm biplate R
    SKU: J75-PK
    Manufacturer: Hardy Diagnostics
    Middlebrook 7H11 Agar is recommended for use in the isolation and cultivation of Mycobacterium species. Middlebrook 7H11 Agar contains inorganic compounds that supply essential growth stimulating inorganic salts, as well as vitamins and necessary co-factors. Comparable to: BD 297250 (10 per PK)
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    was $36.15 Special Price $28.99
  4. StrepPro B Grouping Latex HDx, 60 tests
    Manufacturer: Hardy Diagnostics
    StrepPro B Grouping Reagent, for the rapid latex agglutination test, 60 tests, by Hardy Diagnostics Grouping reagent for the rapid latex agglutination test for the identification of streptococcal groups. Comparable to: BD 240957 (1 per EA)
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    was $120.84 Special Price $96.93
  5. Orange Serum Agar; HDx, 15x100mm plate * R
    SKU: G181-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 $34.25 Special Price $27.48
  6. Saline 0.85%, 100ml; HDx, 125ml PP Bottle
    SKU: U155-PK
    Manufacturer: Hardy Diagnostics
    Saline, 0.85%, 100ml, 125ml polypropylene bottle, order by the package of 12, by Hardy Diagnostics For the preparation of isotonic suspensions and dilutions of microorganisms. Filtered to minimize particulates and dead bacteria. (12 per PK)
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    was $97.07 Special Price $77.86
  7. TSB, 9ml; HDx, 16x100mm tube
    SKU: K88-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), 9ml, 16x100mm tube, order by the package of 20, by Hardy Diagnostics (Tryptic Soy Broth) For sterility testing and cultivation of microorganisms. Comparable to: BD 221092 (20 per PK)
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    was $49.93 Special Price $40.05
  8. Fluid Thio., USP, 20ml; HDx, Serum Vial
    SKU: U68-PK
    Manufacturer: Hardy Diagnostics
    Fluid Thioglycollate, USP, 20ml fill, serum vial with needle-port septum, order by the package of 50, by Hardy Diagnostics Hardy Diagnostics Fluid Thioglycollate Media, USP is recommended for the cultivation of aerobic, microaerophilic, and anaerobic microorganisms in normally sterile materials. Fluid Thioglycollate Medium conforms to the formula stated in the United States Pharmacopeia (USP). (Thioglycollate Broth with Resazurin Oxygen Indicator) For the cultivation of microorganisms and USP sterility procedures. Comparable to: Remel R08846 (50 per PK)
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    was $221.07 Special Price $177.32
  9. BHI Broth, 1ml; HDx, 13x100mm tube
    SKU: K110-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS (Brain Heart Infusion Broth) For the cultivation of microorganisms. (20 per PK)
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    was $125.80 Special Price $100.91
  10. m FC w/1% Rosolic Acid; HDx, 11x50mm (Advantek) R
    SKU: G272-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS For the isolation and enumeration of fecal coliforms in water using membrane filtration, based on lactose fermentation. Contains 1% Rosolic Acid. (10 per PK)
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    was $76.42 Special Price $61.30
  11. Mycoplasma Agar; HDx, 15x60mm plt 10/pk* R
    SKU: G362-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS For the cultivation of Mycoplasma and the detection of Mycoplasma contamination in biologics and biological processes. 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 $44.46 Special Price $35.66
  12. Fluid A, USP, 100ml; HDx, 100ml btl w/septum
    SKU: U109-PK
    Manufacturer: Hardy Diagnostics
    Fluid A, USP, 100ml fill, 100ml bottle with needle-port septum, order by the package of 20, 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. (20 per PK)
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    was $133.10 Special Price $106.76
  13. Malonate Broth; HDx, 13x100mm tube
    SKU: K36-PK
    Manufacturer: Hardy Diagnostics
    Malonate Broth, 5ml, 13x100mm tubes, optically clear, glass tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS For the differentiation of gram negative bacilli based on malonate utilization. Comparable to: Remel R061326 (20 per PK)
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    was $104.91 Special Price $84.15
  14. Starch Agar; HDx, 15x100mm plt 10/pk R
    SKU: G294-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS Hardy Diagnostics Starch Agar is recommended for the use in the determination of starch hydrolysis by microorganisms. Comparable to: BD 295911 (10 per PK)
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    was $102.27 Special Price $82.04
  15. Loop, Disposable, 10uL, Flexible, Light Blue, Loop Caddy, Resealable Pouches
    Manufacturer: Hardy Diagnostics
    Loop, Disposable, 10uL, Flexible, Light Blue, Loop Caddy, Resealable Pouches (1 per EA )
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    was $153.75 Special Price $123.31
  16. Lauryl Tryptose Broth, SS; HDx, 16x125mm w/Dtube
    SKU: K61-PK
    Manufacturer: Hardy Diagnostics
    Lauryl Tryptose Broth, Single Strength, 10ml, 16x125mm tube with durham tube, order by the package of 20, by Hardy Diagnostics For the detection of coliforms in water and food. Single strength. Contains a durham tube for gas detection. (20 per PK)
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    was $68.61 Special Price $55.02
  17. StrepPro Extraction Rgt 1 HDx, 60 tests EA 1
    Manufacturer: Hardy Diagnostics
    StrepPRO™ Extraction Reagent 1, for the rapid latex agglutination test, 60 tests, by Hardy Diagnostics Extraction 1 Reagent for the rapid latex agglutination test for the identification of streptococcal groups. Comparable to: Remel R62052 (1 per EA)
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    was $70.29 Special Price $56.37
  18. m HPC Agar; HDx, 15x60mm plate, * R
    SKU: G95-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS For the enumeration of heterotrophic organisms in water samples using membrane filtration. (10 per PK)
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    was $58.84 Special Price $47.19
  19. Brucella/LKV Biplate; HDx, 15x100mm biplate R
    SKU: J87-PK
    Manufacturer: Hardy Diagnostics
    For the cultivation of anaerobic bacteria and the selective isolation of Bacteroides spp.
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    was $23.43 Special Price $18.80
  20. SabDex w/L&T; HDx,15x65mm Contct Plt *R
    SKU: P46-PK
    Manufacturer: Hardy Diagnostics
    SabDex Agar (Sabouraud Dextrose 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 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. Sabouraud Dextrose Agar with Lecithin and Tween® 80 is recommended for the cultivation of yeasts and fungi from environmental samples. 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 $19.96 Special Price $16.01
  21. HardyCHROM sakazakii; HDx, 15x100mm plt 10/pk R
    SKU: G315-PK
    Manufacturer: Hardy Diagnostics
    Provides assurance of product purity! Sakazakii is a chromogenic medium recommended for the selective isolation and differentiation of Cronobacter (Enterobacter) sakazakii from other members of the family Enterobacteriaceae based on colony color. Features and Benefits: Cronobacter sakazakii produces smooth, turquoise colonies Other members of the Enterobacteriaceae family will produce white or colorless colonies with or without black centers (10 per PK)
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    was $107.13 Special Price $85.92
  22. Letheen Agar Plate; HDx, 15x100mm plate R
    SKU: G42-PK
    Manufacturer: Hardy Diagnostics
    Letheen Agar Plate used to determine the bactericidal activity of quaternary ammonia compounds.
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    was $12.98 Special Price $10.42
  23. Mycoplasma wCefoperazone; HDx,15x100mm no plt lbl R
    SKU: G212-PK
    Manufacturer: Hardy Diagnostics
    For the detection of Mycoplasma spp. associated with bovine mastitis. (10 per PK)
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    was $28.30 Special Price $22.69
  24. Sabdex C&G; HDx, 15x100mm plate * R
    SKU: W73-PK
    Manufacturer: Hardy Diagnostics
    Sabdex (Sabouraud Dextrose) with Chloramphenicol and Gentamicin, deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS For the selective isolation of fungi. Comparable to: BD 296359 (10 per PK)
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    was $40.54 Special Price $32.52
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