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. PYR Test Kit,100 tests HDx,w/20ml Dev. EA 1
    SKU: Z175-EA
    Manufacturer: Hardy Diagnostics
    PYR Test Kit, 100 tests, with 20ml chromogenic developer, on paper disks, by Hardy Diagnostics PREFER TO SHIP GROUND A rapid test for Group A Strep and Enterococcus, both of which are PYR positive, all other streps are negative. A more reliable test for Group A Strep than bacitracin, the L-pyrrolidonyl -B-napthylamide impregnated disks serve as a substrate for the detection of pyrrolidonyl peptidase. Features and Benefits: Positives turn red Takes only 3 minutes On large 3/8" disks Includes PYR reagent (cinnamaldehyde). Comparable to: Remel R30854401 (1 per EA)
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    was $79.34 Special Price $63.64
  2. Thio w/Indicator, 10ml HDx, 16x125mm tube, PK20
    SKU: K21-PK
    Manufacturer: Hardy Diagnostics
    ("Fluid Thioglycollate" Broth with resazurin oxygen indicator and dextrose) For the cultivation of microorganisms. Filtered to remove all dead bacteria and debris. This product is for human diagnostic use and is taxed as a medical device. For a Fluid Thio that is for sterility and environmental testing, see Cat. no. K121 (non-taxable). 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 (20 per PK)
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    was $52.09 Special Price $41.78
  3. TSB, 5ml; HDx, 13x100mm tube
    SKU: K89-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), 5ml fill, 13x100mm tubes, optically clear, shatter resistant, polycarbonate tube, order by the package of 20, by Hardy Diagnostics Tryptic Soy Broth) For sterility testing and cultivation of microorganisms. Comparable to: BD 221716 (20 per PK)
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    was $51.21 Special Price $41.09
  4. PPLO Selective Broth; HDx, 13x100mm tube, R
    SKU: R88-PK
    Manufacturer: Hardy Diagnostics
    PPLO Selective Broth, 4ml, 13x100mm tube, optically clear, glass tube, order by the package of 20, by Hardy Diagnostics For the selective isolation of Mycoplasmataceae (pleural pneumonia-like organisms), especially Mycoplasma pneumoniae. Comparable to: BD 245114 (20 per PK)
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    was $262.09 Special Price $210.22
  5. SabHI Ag w/Bl,Chlor&Cyclo; HDx, plstc HardyFlask R
    SKU: X73-PK
    Manufacturer: Hardy Diagnostics
    SabHI Agar with Blood, Chloramphenicol and Cycloheximide, 12ml, HardyFlask™, order by the package of 20, by Hardy Diagnostics (Sabouraud Dextrose and Brain Heart Infusion Agar with 5% sheep blood, chloramphenicol and cycloheximide) For the selective isolation of pathogenic fungi. HardyFlask™ Features: Lightweight For reduced shipping cost and less chance of breakage. Stackable For increased conservation of space, both in incubator and refrigerator. No special storage racks are needed. Interlocking For increased stability when incubating and transporting. Large surface area For the inoculum. Almost double the area! better isolation of colonies. Slanted neck Facilitates easy inoculation of the flat media surface. Improved clarity For better visibility of the growing culture, both front and back. Comparable to: Remel R08742 (20 per PK)
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    was $116.56 Special Price $93.49
  6. Blood Agar, 5%, Slant; HDx, 16x100mm tube, R
    SKU: L12-PK
    Manufacturer: Hardy Diagnostics
    Blood Agar, 5%, Slant, 5.5ml, 16x100mm tube, order by the package of 20, by Hardy Diagnostics (Tryptic Soy Agar with 5% Sheep Blood) For the cultivation of microorganisms. Comparable to: Remel R060312 (20 per PK)
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    was $71.68 Special Price $57.50
  7. TSB, USP, 20ml; HDx, Serum Vial
    SKU: U38-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), USP, 20ml fill, serum vial, order by the package of 50, by Hardy Diagnostics For the cultivation of microorganisms. Also known as TSB or Soybean-Casein Digest Broth, USP. 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. (50 per PK)
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    was $215.89 Special Price $173.17
  8. Regan Lowe w/o Cephalexin; HDx, 15x100mm plate R
    SKU: A63-PK
    Manufacturer: Hardy Diagnostics
    (Charcoal Blood Agar with 10% Horse Blood and w/o Cephalexin) For the selective isolation of Bordetella pertussis. Bordatella are respiratory pathogens, they reside on the mucous membranes of the respiratory tract. Comparable to: Remel R452432 (10 per PK)
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    was $82.04 Special Price $65.80
  9. Modified Trichrome Bl; HDx, 16oz
    Manufacturer: Hardy Diagnostics
    Modified Trichrome Blue Stain, for microsporidia, 16 ounces, by Hardy Diagnostics For staining microsporidia, formulated according to Weber and Ryan, with aniline blue (1 per EA)
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    was $410.29 Special Price $329.09
  10. INHIB.MOLD AGAR PK10
    SKU: W25-PK
    Manufacturer: Hardy Diagnostics
    Inhibitory Mold Agar (with chloramphenicol), deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics For the selective isolation of pathogenic fungi. Contains chloramphenicol for inhibition of bacteria. Comparable to: Remel R01505 (10 per PK)
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    was $14.36 Special Price $11.52
  11. Campy FDA Agar; HDx, 15x100mm plate R
    SKU: A139-PK
    Manufacturer: Hardy Diagnostics
    Campy FDA Agar; HDx, 15x100mm plate R (10 per PK)
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    was $61.00 Special Price $48.93
  12. SF Broth; HDx, 16x125mm tube
    SKU: K45-PK
    Manufacturer: Hardy Diagnostics
    SF Broth, 5ml, 16x125mm tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS For the differentiation of group D enterococci from group D non-enterococci from milk, water, waste water, and fecal specimens. (20 per PK)
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    was $106.96 Special Price $85.80
  13. Tetrathionate Broth, 1L; HDx, 1L bottle
    SKU: U165-PK
    Manufacturer: Hardy Diagnostics
    Tetrathionate Broth, 1 liter, 1 liter polyethylene terephthalate, order by the package of 10, by Hardy Diagnostics For selective enrichment of Salmonella spp. Use with iodine-iodide solution (cat. no. Z129) (10 per PK)
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    was $310.04 Special Price $248.67
  14. Vogel and Johnson Agar; HDx, 15x100mm R
    SKU: G193-PK
    Manufacturer: Hardy Diagnostics
    For the selective isolation of coagulase-positive, mannitol-positive Staphylococcus aureus strains in clinical specimens and foods. (10 per PK)
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    was $17.31 Special Price $13.88
  15. Acetate Differential Slnt; HDx, 16x100mm tube
    SKU: L15-PK
    Manufacturer: Hardy Diagnostics
    Acetate Differential Slant, 16x100mm tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS For the differentiation of E. coli and Shigella spp. (20 per PK)
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    was $78.93 Special Price $63.30
  16. CGB Agar; HDx,15x100mm plate R
    SKU: G113-PK
    Manufacturer: Hardy Diagnostics
    For the differentiation of Cryptococcus neoformans var. neoformans and Cryptococcus gattii. (10 per PK)
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    was $91.22 Special Price $73.16
  17. Potato Flake Select. Agar; HDx, 15x100mm plate R
    SKU: W159-PK
    Manufacturer: Hardy Diagnostics
    Potato Flake Selective Agar (with Ciprofloxacin and Vancomycin) deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics For the selective isolation of pathogenic fungi. Comparable to: BD 292362 (10 per PK)
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    was $38.31 Special Price $30.72
  18. E.coli, MBL ATCC 25922, KwikStikPlus EA1
    Manufacturer: Hardy Diagnostics
    E.coli, MBL ATCC 25922, KwikStikPlus EA1 (1 per EA )
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    was $408.75 Special Price $403.95
  19. TSB, USP, 100ml; HDx,125ml PC w/Septum
    SKU: U141-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), USP, 100ml fill, 125ml Polycarbonate bottle with needle-port septum screw cap, by Hardy Diagnostics, order by the package of 16 For the cultivation of microorganisms. Also known as TSB or Soybean-Casein Digest Broth, USP. 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. Comparable to: BD 257213 (16 per PK)
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    was $277.83 Special Price $222.85
  20. Thayer Martin Mod. Agar HDx, 15x100mm plate PK10
    SKU: E30-PK
    Manufacturer: Hardy Diagnostics
    For the selective isolation of Neisseria gonorrhoeae. Contains vancomycin, colistin, nystatin, and trimethoprim antimicrobials. Comparable to: BD 297715 (10 per PK)
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    was $17.76 Special Price $14.25
  21. Mueller Hinton Broth; HDx, 13x100mm tb, 3ml
    SKU: R38-PK
    Manufacturer: Hardy Diagnostics
    Mueller Hinton Broth, 3ml, 13x100mm tube, order by the package of 20, by Hardy Diagnostics For the preparation of suspensions for disk diffusion sensitivity testing. Comparable to: Remel R061470 (20 per PK)
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    was $55.69 Special Price $44.67
  22. StrepPro A Grouping Latex HDx, 60 tests EA 1
    Manufacturer: Hardy Diagnostics
    StrepPro A 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 streptoccoccal groups Comparable to: BD 240958 (1 per EA)
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    was $120.83 Special Price $96.93
  23. Butterflds Phos.Buf 450ml; HDx, 500ml PC bottle
    SKU: U150-PK
    Manufacturer: Hardy Diagnostics
    Butterfield's Phosphate Buffer 450ml, 500ml polycarbonate bottle, order by the package of 10, by Hardy Diagnostics (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 $250.27 Special Price $200.74
  24. PALCAM; HDx, 15x100mm plate R
    SKU: G149-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS For the isolation and cultivation of Listeria species from foods. (10 per PK)
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    was $51.03 Special Price $40.94
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