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. BiGGY Agar Slant; HDx, 13x100mm tube, 3ml R
    SKU: R21-PK
    Manufacturer: Hardy Diagnostics
    BiGGY Agar Slant (Nickerson's Agar), for Candida, 3ml, 13x100mm tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS For the selective isolation and identification of Candida spp. (20 per PK)
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    was $139.07 Special Price $111.55
  2. United Scientific™ Inoculating Loops, Set Of 4
    Manufacturer: United Scientific Supplies
    Our inoculating loop features an 8" long solid brass handle with an insulated grip. The non-calibrated 26 gauge nickel-chromium wire loop is approximately 5mm in diameter. Also available as a set of 4, with color-coded handles for easy identification. (4 per PK )
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    was $14.14 Special Price $10.30
  3. m FC w/1% Rosolic Acid; HDx, 15x60mm plate R
    SKU: G126-PK
    Manufacturer: Hardy Diagnostics
    m-FC Agar with 1% Rosolic Acid is recommended for the detection of fecal coliforms in water samples by membrane filtration and elevated temperature. (10 per PK)
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    was $24.13 Special Price $19.35
  4. TAT Broth, 90ml; HDx, 4oz BostonRnd Btl
    SKU: U87-PK
    Manufacturer: Hardy Diagnostics
    AT Broth, 90ml, 4 ounce boston round bottle, order by the package of 20, by Hardy Diagnostics For the detection of microorganisms from topical drugs, cosmetics, and other viscous materials. (20 per PK)
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    was $179.72 Special Price $144.15
  5. Water w/Tween, 3ml; HDx, 13x100mm tube
    SKU: V03-PK
    Manufacturer: Hardy Diagnostics
    Water with Tween® 80, 3ml, 13x100mm tube, optically clear, glass tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS (Deionized water with Tween 80, 0.02%) For preparing dilutions for MIC procedures. (20 per PK)
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    was $131.35 Special Price $105.35
  6. Standard Methds Ag, 200ml; HDx, 8oz glass bottle
    SKU: U295-PK
    Manufacturer: Hardy Diagnostics
    Standard Methods Agar (Plate Count Agar/Tryptone Glucose Yeast (TGY) Agar), 200ml, 8 ounce glass bottle, order by the package of 12, by Hardy Diagnostics (Plate Count Agar) For the cultivation and enumeration of microorganisms in dairy products, food, and water. Comparable to: BD 299094 (12 per PK)
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    was $128.51 Special Price $103.08
  7. Inhib.Mold Agar w/Genta; HDx, 15x100mm plate R
    SKU: W27-PK
    Manufacturer: Hardy Diagnostics
    Inhibitory Mold Agar with Gentamicin, deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS For the selective isolation of pathogenic fungi. Contains chloramphenicol and gentamicin for inhibition of bacteria. Comparable to: BD 299715 (10 per PK)
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    was $56.03 Special Price $44.95
  8. Swab Buffer 4ml 500/Pk
    Manufacturer: GVS North America
    Swab Buffer 4ml 500/Pk (500 per PK )
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    was $2,358.69 Special Price $1,891.87
  9. SwabKit Total Count 30/Pk
    Manufacturer: GVS North America
    SwabKit Total Count 30/Pk (30 per PK )
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    was $435.90 Special Price $349.63
  10. Peptone Salt, 90ml; HDx,180mL wide mouth jar
    SKU: U390-PK
    Manufacturer: Hardy Diagnostics
    Peptone Salt, 90ml, 180ml wide mouth jar, order by the package of 12, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS For use as a diluent and for the preparation of suspensions. Contains 0.1% proteose peptone and 0.85% NaCl. (12 per PK)
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    was $141.85 Special Price $113.78
  11. A.baumannii, MBL ATCC BAA-1605, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    A.baumannii, MBL ATCC BAA-1605, DuoPak EA1 (1 per EA )
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    was $102.54 Special Price $101.34
  12. SABHI AGAR PK10
    SKU: W75-PK
    Manufacturer: Hardy Diagnostics
    SabHI Agar, (Sabdex and Brain Heart Infusion) deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS For the cultivation of fungi. A combination of Sabouraud Dextrose and Brain Heart Infusion Agar. Comparable to: BD 298192 (10 per PK)
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    was $40.43 Special Price $32.43
  13. Urine Quad Plate; HDx, 15x100 Qd Plt 10/pk
    SKU: J71-PK
    Manufacturer: Hardy Diagnostics
    Section I: EMB Agar formulations are recommended for use as selective and differential media for the isolation of gram-negative bacilli (including coliform organisms and enteric pathogens) from clinical and nonclinical specimens. Section II: XLD Agar is recommended for use as a selective and differential medium for the isolation of gram-negative enteric pathogens from fecal specimens or from food and other samples. Section III: Citrate Agar is recommended for use in the differentiation of gram-negative enteric bacilli based on citrate utilization. Section IV: Blood Agar products are recommended for use as general purpose growth media for the isolation, cultivation, and differentiation of a wide variety of microorganisms. (10 per PK)
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    was $30.53 Special Price $24.49
  14. VRBGA w/Lactose, USP; HDx, 15x100 plt 10/pk *R
    SKU: G297-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 130 PACKS Presence of Enterobacteria per USP 2021 VRBGA+L is for the detection and determination of Enterobacteriaceae, including lactose and non-lactose fermenting groups such as Salmonella and Shigella. (10 per PK)
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    was $15.25 Special Price $12.23
  15. S.enterica, MBL ATCC 13036,DuoPk,Pullorum EA1
    Manufacturer: Hardy Diagnostics
    S.enterica, MBL ATCC 13036,DuoPk,Pullorum EA1 (1 per EA )
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    was $243.79 Special Price $240.92
  16. E.coli, MBL ATCC 8739, Epower EA1
    Manufacturer: Hardy Diagnostics
    E.coli, MBL ATCC 8739, Epower EA1 (1 per EA )
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    $303.61
  17. XLT-4 / BGA w/Novobiocin, 15X100 biplt 100/BX R
    Manufacturer: Hardy Diagnostics
    For the selective isolation and differentiation of Salmonella spp. from environmental samples and food. (100 per PK)
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    was $211.82 Special Price $169.90
  18. Phosphate Buff w/MgCl, 1L; HDx, 1L PC Btl w/Shrink
    SKU: U217-PK
    Manufacturer: Hardy Diagnostics
    Phosphate Buffer with Magnesium Chloride, 1000ml fill, 1 liter polyethylene terephthalate, order by the package of 10, by Hardy Diagnostics For the preparation of dilutions in plate counts for the dairy and food industries. (10 per PK)
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    was $328.48 Special Price $263.47
  19. Escherichia coli (O157:H7) derived from ATCC® 43888™
    Manufacturer: Hardy Diagnostics
    Escherichia coli (O157:H7) derived from ATCC® 43888™ (1 per EA )
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    was $81.42 Special Price $80.47
  20. Acholeplasma laidlawii derived from NCTC 10116, Enumerated Mycoplasma
    Manufacturer: Hardy Diagnostics
    Acholeplasma laidlawii derived from NCTC 10116, Enumerated Mycoplasma (1 per EA )
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    was $395.71 Special Price $391.06
  21. Butterflds Phos.Buf 500ml; HDx, 500ml PC bottle
    SKU: U190-PK
    Manufacturer: Hardy Diagnostics
    Butterfield's Phosphate Buffer, 500ml fill, 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. Our bottle features: Heavy duty Bottles are tough and sturdy to reduce breakage Optically clear Bottles are made of clarified polycarbonate for clear viewing. Easy to read Each bottle is clearly marked with a measuring fill line. (10 per PK)
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    was $188.02 Special Price $150.81
  22. E.coli, MBL ATCC 10799, LyfoDisk EA1
    Manufacturer: Hardy Diagnostics
    E.coli, MBL ATCC 10799, LyfoDisk EA1 (1 per EA )
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    was $273.41 Special Price $270.20
  23. Phosphate Buffer; HDx, 500ml PC Bottle
    SKU: U10-EA
    Manufacturer: Hardy Diagnostics
    Phosphate Buffer; HDx, 500ml PC Bottle (1 per EA)
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    was $20.35 Special Price $16.32
  24. S.aureus, MBL ATCC 6538,EZ-CFU OneStep EA1
    Manufacturer: Hardy Diagnostics
    S.aureus, MBL ATCC 6538,EZ-CFU OneStep EA1 (1 per EA )
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    was $819.63 Special Price $809.98
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