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. 2XYT Broth, Capsules, 4960 Grams of Powder in 320 Total Capsules per Bottle CAS# 91079-40-2; 8013-01-2; 7647-14-5
    Manufacturer: Research Products International
    Dimensions: 10.00 x 11.25 x 10.00, Weight: 13.8, 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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    $1,121.70
  2. C.freundii, MBL ATCC 8090, KwikStik EA1
    Manufacturer: Hardy Diagnostics
    C.freundii, MBL ATCC 8090, KwikStik EA1 (1 per EA )
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    was $220.31 Special Price $217.72
  3. K.pneumoniae, MBL ATCC 10031, Epower EA1
    Manufacturer: Hardy Diagnostics
    K.pneumoniae, MBL ATCC 10031, Epower EA1 (1 per EA )
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    $303.61
  4. Butterfield Phos Buf 100m; HDx, 125ml PP Bottle
    SKU: U290-PK
    Manufacturer: Hardy Diagnostics
    Butterfield's Phosphate Buffer, 100ml fill, 125ml polypropylene bottle, order by the package of 12, by Hardy Diagnostics For the preparation of dilutions and other laboratory tests. (12 per PK)
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    was $145.20 Special Price $116.47
  5. TSA, USP plt 100/BX; HDx,15x100mm R inURin
    Manufacturer: Hardy Diagnostics
    R2A Agar is recommended for enumeration of heterotrophic bacteria in water, especially potable water. 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. Comparable to: BD 299480 (100 per PK)
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    was $128.97 Special Price $103.44
  6. Inoculation Loop, Flexible, 10uL, Calibration Certificate, STERILE, PS, Yellow, Individually Wrapped
    Manufacturer: Globe Scientific
    Inoculation Loop, Flexible, 10uL, Calibration Certificate, STERILE, PS, Yellow, Individually Wrapped, CS250 (250 per CS)
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    was $169.00 Special Price $123.23
  7. SabHI Agar; HDx, plstc HardyFlask
    SKU: X75-PK
    Manufacturer: Hardy Diagnostics
    SabHI Agar, 12ml fill, 50ml plastic HardyFlask™, order by the package of 20, by Hardy Diagnostics For the cultivation of fungi. A combination of Sabouraud Dextrose and Brain Heart Infusion Agar. 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: BD 297691 (20 per PK)
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    was $110.07 Special Price $88.28
  8. Dermatophyte Milk Agar; HDx, 16x100mm tube, R
    SKU: L75-PK
    Manufacturer: Hardy Diagnostics
    Dermatophyte Milk Agar, 6ml, 16x100mm tube, order by the package of 20, by Hardy Diagnostics For the cultivation and differentiation of certain dermatophytes, especially Trichophyton rubrum, T. mentagrophytes, and Microsporum persicolor. (20 per PK)
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    was $89.87 Special Price $72.08
  9. E.coli O121:H19, MBL CDC 02-3211, LyfoDisk EA1
    Manufacturer: Hardy Diagnostics
    E.coli O121:H19, MBL CDC 02-3211, LyfoDisk EA1 (1 per EA )
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    was $329.07 Special Price $325.21
  10. S.cerevisiae, MBL ATCC 9763, EZ-Accu Shot EA1
    Manufacturer: Hardy Diagnostics
    S.cerevisiae, MBL ATCC 9763, EZ-Accu Shot EA1 (1 per EA )
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    was $378.43 Special Price $373.97
  11. Trypto Soy Agar, 500 Grams CAS# 91079-40-2; 91079-46-8; 7647-14-5; 9002-18-0
    Manufacturer: Research Products International
    Dimensions: 3.50 x 7.00 x 3.50, Weight: 1.23, Cas#: 91079-40-2; 91079-46-8; 7647-14-5; 9002-18-0 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $137.10
  12. Sabdex Agar w/L&T, 400ml; HDx, 500ml PC bottle R
    SKU: U175-PK
    Manufacturer: Hardy Diagnostics
    Sabdex (Sabouraud Dextrose) Agar with Lecithin and Tween® 80, 500ml, 16 ounce polycarbonate bottle, order by the package of 10, by Hardy Diagnostics (Sabouraud Dextrose Agar with Lecithin and Tween 80) For the cultivation of fungi and the neutralization of disinfectants. (10 per PK)
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    was $217.88 Special Price $174.75
  13. McFarland Latex Equiv 7; HDx, 16x100mm tube, 8ml
    SKU: ML7-EA
    Manufacturer: Hardy Diagnostics
    McFarland Standard, Latex Equivalent # 7, 8ml fill, 16x100mm tube, by Hardy Diagnostics The McFarland Latex Standards are prepared from suspensions of uniform latex particles with similar absorbance values as the original barium sulfate standards. The stability of McFarland Latex Standards allows for a significantly longer shelf-life than the original barium sulfate standards due to reduced light sensitivity. (1 per EA)
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    was $81.39 Special Price $65.28
  14. Potato Dextrose,Deep, USP; HDx, 20x125mm tube
    SKU: Q29-PK
    Manufacturer: Hardy Diagnostics
    Potato Dextrose Agar Deep, USP, 18ml, 20x125mm pour tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS For the cultivation of yeasts and molds. (20 per PK)
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    was $142.04 Special Price $113.93
  15. B.cereus, MBL ATCC 14579, KwikStik EA1
    Manufacturer: Hardy Diagnostics
    B.cereus, MBL ATCC 14579, KwikStik EA1 (1 per EA )
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    was $277.06 Special Price $273.80
  16. B.thuringiensis, MBL ATCC 33679, LyfoDisk EA1
    Manufacturer: Hardy Diagnostics
    B.thuringiensis, MBL ATCC 33679, LyfoDisk EA1 (1 per EA )
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    was $239.42 Special Price $236.61
  17. C.perfringens, MBL ATCC 12916, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    C.perfringens, MBL ATCC 12916, DuoPak EA1 (1 per EA )
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    was $102.54 Special Price $101.34
  18. Sabdex Agar,12 ml; HDx, plstc HardyFlask
    SKU: X40-PK
    Manufacturer: Hardy Diagnostics
    abdex (Sabouraud Dextrose) Agar, 12ml, 50ml plastic HardyFlask™, order by the package of 20, by Hardy Diagnostics Recommended for the isolation, cultivation, and maintenance of non-pathogenic and pathogenic species of fungi and yeasts. 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 R10268 (20 per PK)
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    was $108.47 Special Price $87.00
  19. L. plantarum, MBL ATCC 14917, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    L. plantarum, MBL ATCC 14917, DuoPak EA1 (1 per EA )
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    was $81.42 Special Price $80.47
  20. Trypto Soy Broth, 5 Kilograms
    Manufacturer: Research Products International
    Dimensions: 10.00 x 11.25 x 10.00 Weight: 12.72 - Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $657.20
  21. Tryptone, Granulated, 2 Kilogram CAS# 91079-40-2
    Manufacturer: Research Products International
    Dimensions: 4.88 x 7.25 x 4.88, Weight: 2.42, Cas#: 91079-40-2 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $335.15
  22. SabDex Agar, 60ml; HDx, 25x100mm plt 5/pk R
    SKU: W250-PK
    Manufacturer: Hardy Diagnostics
    SabDex Agar, 25x100mm Plate, 60ml deep fill, order by the package of 5, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS For the isolation, cultivation, and maintenance of non-pathogenic and pathogenic species of fungi and yeasts. (5 per PK)
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    was $25.27 Special Price $18.10
  23. TSB w/L&T, 100ml, USP; HDx,240mL WM Jar
    SKU: U261-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), with Lecithin & Tween® 20, USP, 100ml fill, 8oz wide mouth jar, USP, order by the package of 12, by Hardy Diagnostics For the cultivation of microorganisms. (12 per PK)
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    was $113.18 Special Price $90.78
  24. StrepPro G Grouping Latex, HDx, 60 tests EA 1
    Manufacturer: Hardy Diagnostics
    StrepPRO™ Grouping Reagent G, 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: Remel R62035 (1 per EA)
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    was $125.60 Special Price $100.74
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