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. MIDDLEBROOK 7H11 PK10
    SKU: W35-PK
    Manufacturer: Hardy Diagnostics
    MIDDLEBROOK 7H11 PK10 (10 per PK)
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    was $19.59 Special Price $15.71
  2. CTA w/ Salicin; HDx, 13x100mm tube, R
    SKU: Y24-PK
    Manufacturer: Hardy Diagnostics
    CTA (Cystine Tryptic Agar) with Salicin, 3ml Deep, 13x100mm tube, optically clear, glasstube, order by the package of 20, by Hardy Diagnostics Hardy Diagnostics CTA Media are recommended for the determination of carbohydrate fermentation by fastidious organisms such as Neisseria spp. They are also used for the detection of bacterial motility and serve as a culture media for microorganism maintenance. (20 per PK)
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    was $169.58 Special Price $136.02
  3. Thio w/Supplements HDx, 16x125mm tube, PK20
    SKU: K23-PK
    Manufacturer: Hardy Diagnostics
    Thioglycollate with Supplements, (Hemin, Vitamin K, and Calcium Carbonate Chip), filtered (to remove dead bacteria), 10ml, 16x125mm tube, order by the package of 20, by Hardy Diagnostics (Thioglycollate without Indicator, with Hemin, Vitamin K, and Calcium Carbonate Chip as a buffer) For the cultivation of fastidious anaerobes. Filtered to remove all dead bacteria and debris. Intended for human diagnostic use and taxed as a medical device. The last thing you want to see on your Gram Stain of sterile fluids is dead bacteria! Not from your specimen, but from your culture medium broth… Did you know that all powdered culture media contains bacteria that, although killed during the sterilization process, may show up as dead bacteria on your Gram stain? This is a possible cause of false positive reports. Hardy Diagnostics solves this problem by filtering its Thioglycollate before sterilization, leaving the medium clear, clean, and free from dead bacteria! Avoid false positives, and insist that your Thioglycollate be filtered. Filtered: 0.45 micron filter will remove dead bacteria from the medium Selection: Many different tubes sizes and fill volumes available Economical: Ask us for a price quote for large quantities Fast Delivery: Hardy Diagnostics maintains six distribution centers across the USA Comparable to: BD 298518 (20 per PK)
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    was $52.59 Special Price $42.18
  4. UVM Broth, 500ml; HDx, 500ml PC bottle
    SKU: U51-PK
    Manufacturer: Hardy Diagnostics
    UVM Broth, for Listeria, 500ml, 500ml polycarbonate bottle, order by the package of 10, by Hardy Diagnostics (UVM Modified Listeria Broth) For the selective cultivation of Listeria monocytogenes. (10 per PK)
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    was $312.39 Special Price $250.56
  5. Lowenstein Jensen, Gruft; HDx, plstc HardyFlask R
    SKU: X23-PK
    Manufacturer: Hardy Diagnostics
    LJ (Lowenstein Jensen) Gruft, 50ml plastic HardyFlask™, order by the package of 20, by Hardy Diagnostics Lowenstein Jensen Media are recommended for use in the cultivation and isolation of Mycobacterium species. (20 per PK)
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    was $123.01 Special Price $98.66
  6. TSA, USP, 150ml; HDx, 8oz glass bottle
    SKU: U49-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Agar (TSA), USP, 150ml, 8 ounce glass bottle, order by the package of 20, 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. (20 per PK)
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    was $224.04 Special Price $179.70
  7. TSB, USP, 25ml; HDx,180mL WM jar
    SKU: U223-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), USP, 25ml, 180ml optically clear, shatter resistant, polycarbonate wide mouth jar, order by the package of 12, by Hardy Diagnostics For the cultivation of microorganisms. Also known as TSB or Soybean-Casein Digest Broth, USP. (12 per PK)
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    was $141.06 Special Price $113.14
  8. Rose Bengal w/Chloramphen; HDx, 15x100mm plate R
    SKU: W87-PK
    Manufacturer: Hardy Diagnostics
    Rose Bengal Agar with Chloramphenicol, deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS For the selective isolation and enumeration of yeasts and molds. Many yeasts and molds will not grow in an acidic pH environment. This media has a neutral pH which helps grow yeast and mold, but is also conducive to the growth of bacteria. The addition of chloramphenicol helps reduce bacterial overgrowth. (10 per PK)
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    was $63.79 Special Price $51.18
  9. Lactobacilli MRS Agar; HDx, 15x60mm plate R
    SKU: G197-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS For the isolation and enumeration of Lactobacillus spp. (10 per PK)
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    was $71.55 Special Price $57.38
  10. Sulfite Polymyxin Milk Ag; HDx, 15x100mm plt 10/pk R
    SKU: G251-PK
    Manufacturer: Hardy Diagnostics
    For the selective isolation of Clostridium spp. from fecal samples. (10 per PK)
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    was $19.31 Special Price $15.49
  11. BHI w/H&K 10ml; HDx, 16x125mm tb 20/pk R
    SKU: K75-PK
    Manufacturer: Hardy Diagnostics
    Brain Heart Infusion Broth with Hemin and Vitamin K (BHI Broth w/H&K), 16x125mm tube, 10ml fill, order by the package of 20, by Hardy Diagnostics For the cultivation of fastidious bacteria. (20 per PK)
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    was $76.71 Special Price $61.53
  12. Sabdex Agar, USP, 200ml; HDx, 16 oz glass Btl BR
    SKU: U227-PK
    Manufacturer: Hardy Diagnostics
    Sabdex (Sabouraud Dextrose) Agar, USP, 200ml fill, 16 ounce glass boston round bottle, order by the package of 12, by Hardy Diagnostics (Sabourauds Dextrose Agar) For the cultivation of fungi. (12 per PK)
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    was $208.53 Special Price $167.25
  13. BHI Agar w/Chlr&Cyc; HDx, plstc HardyFlask
    SKU: X11-PK
    Manufacturer: Hardy Diagnostics
    BHI (Brain Heart Infusion) Agar with Chloramphenicol and Cycloheximide, plastic HardyFlask™, order by the package of 20, by Hardy Diagnostics Brain Heart Infusion (BHI) Agar is a general purpose nutrient medium recommended for the cultivation and isolation of a variety of microorganisms, including bacteria, yeasts, and molds. The addition of defibrinated sheep blood and antimicrobics produces a selective medium used for the isolation of pathogenic fungi from specimens heavily contaminated with bacteria and saprophytic fungi. Comparable to: BD 297803 (20 per PK)
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    was $114.66 Special Price $91.96
  14. Blood Agar. 8%; HDx,15x100mm plt 100/bx R
    Manufacturer: Hardy Diagnostics
    (Tryptic Soy Agar with 8% Sheep Blood) For the cultivation of microorganisms. (100 per PK)
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    was $628.46 Special Price $433.24
  15. Moellrs Arginine Decarb.; HDx,16x125mm tube,brth
    SKU: Y42-PK
    Manufacturer: Hardy Diagnostics
    Moeller's Arginine 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 R060756 (20 per PK)
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    was $76.08 Special Price $61.02
  16. TSA w/bld & 0.1% Esculin; HDx, 15x100mm 100/BX * R
    Manufacturer: Hardy Diagnostics
    For use in the screening dairy products for the detection of microorganisms that may cause mastitis in dairy cattle, by Hardy Diagnostics. (100 per PK)
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    was $180.29 Special Price $144.61
  17. YM-11 Agar; HDx, 15x100mm plate R
    SKU: G01-PK
    Manufacturer: Hardy Diagnostics
    For the cultivation and enumeration of yeasts and molds. (10 per PK)
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    was $75.67 Special Price $60.70
  18. Sabdex Agar, USP, 200ml; HDx, 500ml PC Bottle
    SKU: U270-PK
    Manufacturer: Hardy Diagnostics
    Sabdex (Sabouraud Dextrose) Agar, USP, 200ml, 500ml polycarbonate bottle, order by the package of 10, by Hardy Diagnostics (Sabourauds Dextrose Agar) For the cultivation of fungi. (10 per PK)
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    was $353.19 Special Price $283.28
  19. TAT Broth, 99ml; HDx, 8oz wide mouth jar
    SKU: U88-PK
    Manufacturer: Hardy Diagnostics
    TAT Broth, 99ml fill, 8 ounce wide mouth glass jar, order by the package of 12, by Hardy Diagnostics For the detection of microorganisms from topical drugs, cosmetics, and other viscous materials. (12 per PK)
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    was $123.93 Special Price $99.40
  20. Middlebrook 7H11 ThinPour; HDx,10x100mmSpaceSaver, R
    SKU: SP57-PK
    Manufacturer: Hardy Diagnostics
    Middlebrook 7H11 Thin Pour, for microscopic examination, 10x100mm Space Saver plate, order by the package of 15, by Hardy Diagnostics For the isolation and detection of mycobacteria using the microcolony method. Thin pour plate for microscopic examination. Use with MycoSeals (cat. no. SS9225) (15 per PK)
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    was $219.40 Special Price $175.98
  21. TSA, USP; HDx, 15x150mm plate, R
    SKU: H19-PK
    Manufacturer: 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. Comparable to: BD 221803 (10 per PK)
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    was $46.60 Special Price $37.38
  22. R2A Deep, 18ml; HDx, 20x125mm tube
    SKU: Q77-PK
    Manufacturer: Hardy Diagnostics
    R2A Agar, 18ml fill, 20x125mm tube deep, order by the package of 20, by Hardy Diagnostics For the detection of heterotrophic bacteria in water, by the membrane filtration technique. (20 per PK)
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    was $101.13 Special Price $81.11
  23. Middlebrook 7H10w/HuBlood; HDx, 20x125mm tube R
    SKU: C42-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS For the cultivation of fastidious mycobacteriae, especially M. genavense. (20 per PK)
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    was $165.62 Special Price $132.84
  24. BHI Agar w/Blood; HDx, plstc HardyFlask R
    SKU: X13-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 $119.66 Special Price $95.97
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