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. CLED Agar; HDx,15x100mm plt 10/pk *R
    SKU: G223-PK
    Manufacturer: Hardy Diagnostics
    (Cystine-Lactose-Electrolyte-Deficient Agar) For the isolation, enumeration, and presumptive identification of urinary pathogens on the basis of lactose fermentation, while controlling the swarming of Proteus spp. (10 per PK)
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    was $20.07 Special Price $16.10
  2. TSB, 2ml; HDx, 13x100mm tube
    SKU: R31-PK
    Manufacturer: Hardy Diagnostics
    Tryptic Soy Broth (TSB), 2ml, 13x100mm tube, optically clear, Glass tube, order by the package of 20, by Hardy Diagnostics (Tryptic Soy Broth) For sterility testing and cultivation of microorganisms. Comparable to: BD 221815 (20 per PK)
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    was $48.34 Special Price $38.78
  3. BHI w/Bld,Chlr & Gent Ag; HDx,20x125mm tube R
    SKU: L114-PK
    Manufacturer: Hardy Diagnostics
    BHI (Brain Heart Infusion) Agar with Blood, Chloramphenicol and Gentamicin, 20x125mm tube, order by the package of 20, by Hardy Diagnostics (Brain Heart Infusion Agar with 5% Sheep Blood, Chloramphenicol, and Gentamicin) For the selective isolation of fungi. Comparable to: Remel R08070 (20 per PK)
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    was $107.78 Special Price $86.45
  4. Inhibitory Mold Agar; HDx, plstc HardyFlask
    SKU: X20-PK
    Manufacturer: Hardy Diagnostics
    Inhibitory Mold Agar (with Chloramphenicol), plastic HardyFlask™, order by the package of 20, by Hardy Diagnostics Inhibitory Mold Agar and Inhibitory Mold Agar with Gentamicin are recommended for the selective isolation of 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 R10070 (20 per PK)
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    was $108.29 Special Price $86.86
  5. Fluid K, USP, 1L; HDx, 1L PP bottle
    SKU: U206-PK
    Manufacturer: Hardy Diagnostics
    Fluid K, USP, 1 liter, polypropylene bottle, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS A diluting and rinsing fluid for the membrane filtration technique. 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. (10 per PK)
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    was $339.23 Special Price $272.10
  6. HUrBi; HDx,15x100mm biplate R
    SKU: J100-PK
    Manufacturer: Hardy Diagnostics
    One plate tells the whole story! HUrBi™ Biplate is a selective chromogenic medium recommended for the cultivation, differentiation and enumeration of various gram-negative and gram-positive bacteria, and yeast based on colony color and morphology. Selective agents have been added to the each side of the biplate to select for growth of gram-positive organisms and yeast on one side and to select for growth of gram-negative organisms on the other side of the biplate. Features and Benefits: Saves Money Reduce the need for expensive automated ID cards. Easy Read-Out Distinct color reactions for each of the common urinary tract pathogens make it easier to detect mixed infections. Confirmatory Identify E. coli and Enterococcus spp. with no further testing needed. (10 per PK)
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    was $44.31 Special Price $35.54
  7. Potato Flake Agar; HDx, 15x100mm plate R
    SKU: W59-PK
    Manufacturer: Hardy Diagnostics
    Potato Flake Agar, deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS For the cultivation of fungi. Induces conidia and spore formation. Comparable to: BD 298328 (10 per PK)
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    was $46.82 Special Price $37.55
  8. Butterfields PhosBufr,9ml; HDx, 20x125mm tube
    SKU: K209-PK
    Manufacturer: Hardy Diagnostics
    Butterfield's Phosphate Buffer, 9ml, 20x125mm tube, order by the package of 20, by Hardy Diagnostics (Butterfield's Phosphate Buffer, pH: 7.2) For the preparation of dilutions for plate count and other laboratory tests (20 per PK)
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    was $82.92 Special Price $66.52
  9. Rapid Ornithine; HDx, 13x100mm tube R
    SKU: K279-PK
    Manufacturer: Hardy Diagnostics
    Rapid Ornithine, for Enterobacteriaceae and Staphylococcus lugdunensis, 1ml fill, 13x100mm glass tube, optically clear, order by the package of 20, by Hardy Diagnostics Hardy Diagnostics Rapid Ornithine can be used to detect ornithine decarboxylase activity in as little as two to four hours. This test will assist in the identification of Enterobacteriaceae and Staphylococcus lugdunesis. The Hardy Diagnostics manufacturing facility and quality management system comply with the FDA's Good Manufacturing Practices (GMP) and have achieved ISO 13485 certification as a medical device manufacturer. Quality is a science...Service is an art. At Hardy Diagnostics, we believe in excellence in patient care...just like you do! (20 per PK)
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    was $72.38 Special Price $58.05
  10. TAT Broth, 90ml; HDx, 8oz glass jar
    SKU: U77-PK
    Manufacturer: Hardy Diagnostics
    TAT Broth, 90ml fill, 8 ounce wide mouth glass jar, order by the package of 12, by Hardy Diagnostics TAT (Tryptone-Azolectin-Tween®) Broth is recommended for use in cultivating microorganisms from highly viscous or gelatinous materials, such as salves and ointments. These media are especially adapted to the microbiological examination of non-sterile products from pharmaceutical, cosmetic and raw material or end-products, for the purpose of performing microbial enumeration studies. Our Jar features: Crystal-Clear A crystal clear glass construction provides complete visibility Streamlined Design Features a streamlined design with no handle, making it easier to store and clean. Leak-Proof Easy-to-remove, perforated shrink wrap ensures product integrity (12 per PK)
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    was $98.78 Special Price $79.23
  11. LokTight Tryptic Soy Agar (TSA), w/Lecithin and Tween, USP, Irradiated, Triple Bagged
    SKU: P365-PK
    Manufacturer: Hardy Diagnostics
    LokTight Tryptic Soy Agar (TSA), w/Lecithin and Tween, USP, Irradiated, Triple Bagged (10 per PK )
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    was $38.38 Special Price $30.79
  12. LokTight Tryptic Soy Agar (TSA), w/Lecithin and Tween, Contact Plate, Red Tinted Plate, USP, Irradiated, Triple Bagged
    Manufacturer: Hardy Diagnostics
    LokTight Tryptic Soy Agar (TSA), w/Lecithin and Tween, Contact Plate, Red Tinted Plate, USP, Irradiated, Triple Bagged (10 per PK )
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    was $39.15 Special Price $31.40
  13. Bovine Bld w/Esc/MAC; HDx, 15x100 biplt 10/pk R
    SKU: J129-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 20 PACKS Bovine Blood Media is recommended as a general purpose growth media for the primary isolation, cultivation, and differentiation of organisms responsible for mastitis in dairy populations. (10 per PK)
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    was $45.83 Special Price $36.76
  14. Bovine Select Staph Agar; HDx, 15x100mm plt 10/pk R
    SKU: A157-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS Recommended for the cultivation, and selective isolation, of Staphylococcus from Bovine Mastitis specimens. (10 per PK)
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    was $60.02 Special Price $48.14
  15. HardyCHROM MRSA, CP; HDx,15x65mm Contct Plt R
    SKU: P14-PK
    Manufacturer: Hardy Diagnostics
    Bright color development within 24 hours! HardyCHROM™ MRSA, Contact Plate is a chromogenic medium recommended for use in the cultivation of methicillin resistant Staphylococcus aureus (MRSA) from environmental surfaces to aid in the prevention and control of MRSA infections in health care settings. Each contact plate has a specified grid molded into the bottom of the plate for enumeration of microbial colonies growing on a variety of surfaces. HardyCHROM™ MRSA, Contact Plate is not intended to diagnose MRSA infection nor to guide or monitor therapy. Read-out at 24 hours Distinct color change read-out Bright color development (10 per PK)
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    was $84.09 Special Price $67.45
  16. TSB w/Lecithn & Twn 9 ml; HDx, 20x125mm tube
    SKU: K134-PK
    Manufacturer: Hardy Diagnostics
    (Tryptic Soy Broth with Lecithin and Tween 80®) For the cultivation of microorganisms (20 per PK)
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    was $79.15 Special Price $63.48
  17. Lactobacilli MRS Broth; HDx,16x125mm tube R
    SKU: K15-PK
    Manufacturer: Hardy Diagnostics
    Lactobacilli MRS Broth, for Lactobacillus, 9ml fill, 16x125mm tube, order by the package of 20, by Hardy Diagnostics (20 per PK)
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    was $102.55 Special Price $82.25
  18. Columbia Agar, USP; HDx, 15x100mm plate R
    SKU: G250-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS For the isolation and cultivation of nonfastidious and fastidious microorganisms. Conforms to Harmonized USP/EP/JP requirements. (10 per PK)
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    was $38.44 Special Price $30.83
  19. LB Agar w/Ampicillin; HDx,15x100mm 10pk *R
    SKU: G81-PK
    Manufacturer: Hardy Diagnostics
    CulGenex™ LB Agar, Lennox Media is recommended for the cultivation of recombinant Escherichia coli strains used in phage production and in molecular studies. All CulGenex products are offered exclusively through VWR. Comparable to: BD 298273 (10 per PK)
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    was $49.97 Special Price $40.08
  20. Tetrathionate Broth; HDx, 16x125mm tube, * R
    SKU: K65-PK
    Manufacturer: Hardy Diagnostics
    Tetrathionate Broth Base, 10ml, 16x125mm tube, use with iodine #Z129, order by the package of 20, by Hardy Diagnostics For selective enrichment of Salmonella spp. Use with iodine-iodide solution (cat. no. Z129). Comparable to: BD 210430 (20 per PK)
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    was $73.46 Special Price $58.92
  21. BEA w/Azide CNA biplate; HDx, 15x100mm R
    SKU: J66-PK
    Manufacturer: Hardy Diagnostics
    (Bile Esculin Agar with Azide / Columbia Agar with 5% Sheep Blood, Colistin and Nalidixic Acid) For the presumptive identifcation of group D streptococci including enterococci and gram positive bacteria. (10 per PK)
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    was $419.37 Special Price $336.37
  22. LJ w/NaCl Slant; HDx, 20x125mm tube R
    SKU: C29-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS For the differentiation of Mycobacterium spp. Contains 5% NaCl Comparable to: Remel R08518 (20 per PK)
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    was $108.75 Special Price $87.22
  23. BBE/LKV; HDx, 15x100mm biplt 1/pk*
    Manufacturer: Hardy Diagnostics
    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 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 sp Comparable to: BD 297260 (1 per EA)
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    was $7.41 Special Price $5.95
  24. Fraser Broth, Modified; HDx, 16x125mm tube, 10mlR
    SKU: K98-PK
    Manufacturer: Hardy Diagnostics
    Fraser Broth, Modified, 10ml, 16x125mm tube, order by the package of 20, by Hardy Diagnostics Fraser Broth, Modified (without ferric ammonium citrate) is recommended for the selective enrichment of Listeria spp. in foods and environmental samples. This product is not intended to be used for the diagnosis of human disease. Our Tube Features: Flat bottom Contributes to stability when set on end. Leak-proof Caps provide security during handling and transportation. Optically clear Tubes are made of clarified glass for clear viewing. (20 per PK)
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    was $80.21 Special Price $64.34
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