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. S.uberis, MBL ATCC 700407, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    S.uberis, MBL ATCC 700407, DuoPak EA1 (1 per EA )
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    was $90.03 Special Price $88.97
  2. E.coli, MBL ATCC 13706, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    E.coli, MBL ATCC 13706, DuoPak EA1 (1 per EA )
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    was $81.42 Special Price $80.47
  3. C.sputigena, MBL ATCC 33612, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    C.sputigena, MBL ATCC 33612, DuoPak EA1 (1 per EA )
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    was $81.42 Special Price $80.47
  4. B.diminuta, MBL ATCC 11568, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    B.diminuta, MBL ATCC 11568, DuoPak EA1 (1 per EA )
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    was $71.04 Special Price $70.20
  5. E.casseliflavus, MBL ATCC 700327, KwikStik EA1
    Manufacturer: Hardy Diagnostics
    E.casseliflavus, MBL ATCC 700327, KwikStik EA1 (1 per EA )
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    was $189.15 Special Price $186.92
  6. C.neoformans, MBL ATCC 204092, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    C.neoformans, MBL ATCC 204092, DuoPak EA1 (1 per EA )
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    was $90.03 Special Price $88.97
  7. C.perfringens, MBL ATCC 12915, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    C.perfringens, MBL ATCC 12915, DuoPak EA1 (1 per EA )
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    was $102.54 Special Price $101.34
  8. C.krusei, MBL ATCC 14243, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    C.krusei, MBL ATCC 14243, DuoPak EA1 (1 per EA )
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    was $90.03 Special Price $88.97
  9. B.licheniformis, MBL ATCC 12759, LyfoDisk EA1
    Manufacturer: Hardy Diagnostics
    B.licheniformis, MBL ATCC 12759, LyfoDisk EA1 (1 per EA )
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    was $175.58 Special Price $173.51
  10. V.parahaemolyticus, MBL ATCC 17802, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    V.parahaemolyticus, MBL ATCC 17802, DuoPak EA1 (1 per EA )
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    was $90.03 Special Price $88.97
  11. S.saprophyticus, MBL ATCC 49453, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    S.saprophyticus, MBL ATCC 49453, DuoPak EA1 (1 per EA )
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    was $90.03 Special Price $88.97
  12. MacConkey Agar, USP; HDx, 15x65mm contct plt R
    SKU: P47-PK
    Manufacturer: Hardy Diagnostics
    MacConkey Agar, USP, contact plate with Lok-Tight™ friction lid, optional locking feature, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS 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. MacConkey Agar, USP is recommended for use as a selective and differential medium for the isolation of gram-negative bacilli on the basis of lactose fermentation. The U.S. Pharmacopeia National Formulary <61> describes the use of MacConkey Agar for growth promotion of specified microorganisms in the microbiological examination of nonsterile products. 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 $62.46 Special Price $50.10
  13. PDA w/Chloramph; HDx,15x100mm plt,100/BX*R
    Manufacturer: Hardy Diagnostics
    Potato Dextrose Agar with Chloramphenicol, 15x100mm plate, 28ml fill, order by the package of 100, by Hardy Diagnostics Recommended for the selective cultivation of fungi from mixed samples. (100 per PK)
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    was $208.22 Special Price $167.01
  14. CTA with Lactose; HDx, 13x100mm tube, R
    SKU: Y13-PK
    Manufacturer: Hardy Diagnostics
    CTA (Cystine Tryptic Agar) with Lactose, 3ml, 13x100mm tube, optically clear, glass tube, order by the package of 20, by Hardy Diagnostics (Cystine Tryptic Agar with Carbohydrates) For fermentation testing of fastidious bacteria, such as Neisseria spp. Comparable to: Remel R060616 (20 per PK)
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    was $83.16 Special Price $66.71
  15. ONPG, Rapid Test Broth; HDx, 13x100mm tube F
    SKU: R92-PK
    Manufacturer: Hardy Diagnostics
    ONPG, Rapid Test Broth, 0.5ml, 13x100mm tube, optically clear, glass tube, order by the package of 20, by Hardy Diagnostics For the rapid determination of beta-Galactosidase activity of gram negative bacilli. (20 per PK)
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    was $78.88 Special Price $63.26
  16. TSB, USP, 50ml; HDx, 2oz glass bottle
    SKU: U44-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), USP, 50ml fill, 2oz glass bottle, by Hardy Diagnostics, order by the package of 24 For the cultivation of microorganisms. Also known as TSB or Soybean-Casein Digest Broth, USP. (24 per PK)
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    was $272.74 Special Price $218.77
  17. Moellrs Decarb. Base; HDx,16x125mm tube,brth
    SKU: Y41-PK
    Manufacturer: Hardy Diagnostics
    Moeller's Decarboxylase Base (control), 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. A control tube for use with Y42, Y43, and Y44. Comparable to: Remel R060752 (20 per PK)
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    was $80.85 Special Price $64.85
  18. E.coli, MBL ATCC 35421, DuoPak EA1
    Manufacturer: Hardy Diagnostics
    E.coli, MBL ATCC 35421, DuoPak EA1 (1 per EA )
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    was $81.42 Special Price $80.47
  19. Phosphate Buffer, 1L, pH; HDx, Narrow Mouth PC Btl
    SKU: U192-PK
    Manufacturer: Hardy Diagnostics
    Phosphate Buffer, pH 6.8, 1 liter, polycarbonate bottle, order by the package of 10, by Hardy Diagnostics For the preparation of specimens for AFB culture and other applications. 0.067M, pH 6.8. (10 per PK)
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    was $359.93 Special Price $288.69
  20. SterEM R2A Agar, USP, Irradiated, Triple Bagged, 15x100mm Plate
    SKU: W390-PK
    Manufacturer: Hardy Diagnostics
    SterEM R2A Agar, USP, Irradiated, Triple Bagged, 15x100mm Plate (10 per PK )
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    was $73.62 Special Price $59.05
  21. TSB, USP, 100ml; HDx, 4oz Boston Round
    SKU: U42-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), USP, 100ml, 4oz glass bottle, order by the package of 20, by Hardy Diagnostics For the cultivation of microorganisms. Also known as TSB or Soybean-Casein Digest Broth, USP. (20 per PK)
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    was $215.07 Special Price $172.50
  22. DuoPak A; HDx, 15x100mm plt 2/pk *
    Manufacturer: Hardy Diagnostics
    AnaeroGRO™ Bacteroides Bile Esculin Agar is an enriched, selective, and differential medium recommended for the rapid isolation and presumptive identification of obligately anaerobic gram-negative bacilli of the Bacteroides fragilis group and Bilophila spp. LKV (Laked Blood with Kanamycin and Vancomycin) Agar is recommended for use in the selective isolation and partial identification of obligately anaerobic gram-negative bacilli, such as Prevotella spp. and Bacteroides spp. Brucella Agar with Hemin and Vitamin K is recommended for use in the primary isolation, quantitation, and partial identification of obligately anaerobic microorganisms from clinical specimens. The medium is also suitable for the growth of aerobic and microaerophilic bacteria when incubated under the appropriate conditions. (1 per EA)
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    was $8.66 Special Price $6.94
  23. Sabdex Agar w/L&T,400ml; HDx, 16 oz gls btl BR R
    SKU: U431-PK
    Manufacturer: Hardy Diagnostics
    Sabdex (Sabouraud Dextrose) Agar with Lecithin and Tween® 80, 16 ounce glass boston round bottle, 400ml fill, order by the package of 12, by Hardy Diagnostics For the isolation and cultivation of fungi and the neutralization of disinfectants. (12 per PK)
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    was $336.12 Special Price $269.59
  24. MacConkey / MacConkey; HDx, 15x100mm biplate, R
    SKU: J118-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS For isolation and differentiation of gram negative bacteria. (10 per PK)
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    was $63.48 Special Price $50.91
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