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. LB Agar, Low Salt Formula, Granulated, Lennox L Agar, 500 Grams CAS# 91079-40-2, 8013-01-2, 7647-14-5, 9002-18-0
    Manufacturer: Research Products International
    Dimensions: 3.50 x 7.00 x 3.50, Weight: 1.24, Cas#: 91079-40-2, 8013-01-2, 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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    $140.50
  2. m HPC Agar; HDx, 15x60mm plate, * R
    SKU: G95-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 10 PACKS For the enumeration of heterotrophic organisms in water samples using membrane filtration. (10 per PK)
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    was $58.84 Special Price $47.19
  3. Brucella/LKV Biplate; HDx, 15x100mm biplate R
    SKU: J87-PK
    Manufacturer: Hardy Diagnostics
    For the cultivation of anaerobic bacteria and the selective isolation of Bacteroides spp.
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    was $23.43 Special Price $18.80
  4. SabDex w/L&T; HDx,15x65mm Contct Plt *R
    SKU: P46-PK
    Manufacturer: Hardy Diagnostics
    SabDex Agar (Sabouraud Dextrose Agar) with Lecithin and Tween® 80, contact plate with Lok-Tight™ friction lid, optional locking feature, order by the package of 10, by Hardy Diagnostics 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. Sabouraud Dextrose Agar with Lecithin and Tween® 80 is recommended for the cultivation of yeasts and fungi from environmental samples. 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 $19.96 Special Price $16.01
  5. Luria Agar Granulated, Miller's LB Agar, 2 Kilograms CAS# 91079-40-2; 8013-01-2; 7647-14-5; 9002-18-0
    Manufacturer: Research Products International
    Dimensions: 4.88 x 10.25 x 4.88, Weight: 4.7, Cas#: 91079-40-2; 8013-01-2; 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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    $411.75
  6. HardyCHROM sakazakii; HDx, 15x100mm plt 10/pk R
    SKU: G315-PK
    Manufacturer: Hardy Diagnostics
    Provides assurance of product purity! Sakazakii is a chromogenic medium recommended for the selective isolation and differentiation of Cronobacter (Enterobacter) sakazakii from other members of the family Enterobacteriaceae based on colony color. Features and Benefits: Cronobacter sakazakii produces smooth, turquoise colonies Other members of the Enterobacteriaceae family will produce white or colorless colonies with or without black centers (10 per PK)
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    was $107.13 Special Price $85.92
  7. Trypto Soy Broth, 500 Grams
    Manufacturer: Research Products International
    Dimensions: 3.50 x 7.00 x 3.50 Weight: 1.23 - Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $92.25
  8. Letheen Agar Plate; HDx, 15x100mm plate R
    SKU: G42-PK
    Manufacturer: Hardy Diagnostics
    Letheen Agar Plate used to determine the bactericidal activity of quaternary ammonia compounds.
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    was $12.98 Special Price $10.42
  9. Mycoplasma wCefoperazone; HDx,15x100mm no plt lbl R
    SKU: G212-PK
    Manufacturer: Hardy Diagnostics
    For the detection of Mycoplasma spp. associated with bovine mastitis. (10 per PK)
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    was $28.30 Special Price $22.69
  10. Sabdex C&G; HDx, 15x100mm plate * R
    SKU: W73-PK
    Manufacturer: Hardy Diagnostics
    Sabdex (Sabouraud Dextrose) with Chloramphenicol and Gentamicin, deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS For the selective isolation of fungi. Comparable to: BD 296359 (10 per PK)
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    was $40.54 Special Price $32.52
  11. EC Broth; HDx,20x125mm w/Durhm Tube
    SKU: K13-PK
    Manufacturer: Hardy Diagnostics
    (Single Strength EC Broth with durham tube for gas detection) For the detection of coliforms in water. (20 per PK)
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    was $68.04 Special Price $54.57
  12. Inoculating needles, rigid ABS, 25/sterile peel, 40 peels/pack, 1000/cs
    Manufacturer: MTC Bio
    Inoculating needles, rigid ABS, 25/sterile peel, 40 peels/pack, 1000/cs (6000 per CS )
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    was $515.88 Special Price $354.98
  13. Standard Methds Ag, 400ml; HDx, 16 oz. glass btl BR
    SKU: U395-PK
    Manufacturer: Hardy Diagnostics
    Standard Methods Agar (Plate Count Agar/Tryptone Glucose Yeast (TGY) Agar), 400ml, 16 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. (12 per PK)
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    was $200.58 Special Price $160.88
  14. Potato Flake Sel. Agar; HDx, plstc HardyFlask R
    SKU: X59-PK
    Manufacturer: Hardy Diagnostics
    Potato Flake Selective Agar (with Cipro and Vanco), 12ml, 50ml plastic HardyFlask™, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 5 PACKS For the selective isolation of pathogenic fungi. Contains ciprofloxacin and vancomycin for the inhibition of most bacteria. 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. (20 per PK)
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    was $156.83 Special Price $125.80
  15. Luria Broth Miller's Modified, 1 Kilogram
    Manufacturer: Research Products International
    Dimensions: 4.88 x 6.00 x 4.88 Weight: 2.4 - Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $117.50
  16. Anaerobic Pea Pk10
    SKU: A90-PK
    Manufacturer: Hardy Diagnostics
    CDC formula with phenylethanol, 5% sheep blood, hemin, and vitamin K) For the isolation of anaerobic bacteria. Comparable to: Remel R01040 (10 per PK)
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    was $18.69 Special Price $14.99
  17. Agar, High Gel Strength, Powder, 1 Kilogram CAS# 9002-18-0
    Manufacturer: Research Products International
    Dimensions: 4.88 x 7.25 x 4.88, Weight: 2.38, Cas#: 9002-18-0 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $344.20
  18. MYCOBIOTIC AGAR PK10
    SKU: W50-PK
    Manufacturer: Hardy Diagnostics
    Mycobiotic Agar, deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics For the selective isolation of pathogenic fungi especially from hair, skin, and nail specimens. Contains chloramphenicol and cyclohexamide. Comparable to: Remel R01630 (10 per PK)
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    was $20.15 Special Price $16.16
  19. Nutrient Broth, 20ml; HDx, 20x150mm tube
    SKU: K243-PK
    Manufacturer: Hardy Diagnostics
    MINIMUM ORDER: 5 PACKS A general purpose growth medium recommended for use in the cultivation of nonfastidious microorganisms. (20 per PK)
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    was $117.52 Special Price $94.25
  20. Saline,0.9% w/Tween,100ml; HDx, 125ml PP bottle
    SKU: U304-PK
    Manufacturer: Hardy Diagnostics
    Saline, 0.9% with 0.5% Tween® 80, 100ml fill, 125ml polypropylene bottle, order by the package of 12, by Hardy Diagnostics MINIMUM ORDER: 3 PACKS (0.9% NaCl with 0.5% Tween® 80) For preparing dilutions and suspensions of microorganisms. (12 per PK)
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    was $114.89 Special Price $92.15
  21. Terrific Broth, Modified, Granulated, 500 Grams CAS# 91079-40-2; 8013-01-2; 7778-77-0; 7758-11-4
    Manufacturer: Research Products International
    Dimensions: 3.50 x 7.00 x 3.50, Weight: 1.23, Cas#: 91079-40-2; 8013-01-2; 7778-77-0; 7758-11-4 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $92.25
  22. MacConkey Agar Deep; HDx, 20x150mm tb 20/pk R
    SKU: Q63-PK
    Manufacturer: Hardy Diagnostics
    MacConkey Agar Deep, 20x150mm tube, order by the package of 20, by Hardy Diagnostics MINIMUM ORDER: 10 PACKS Hardy Diagnostics MacConkey Agar is recommended for use as a selective and differential medium for the isolation of gram-negative bacilli (including coliform organisms and enteric pathogens), on the basis of lactose fermentation. (20 per PK)
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    was $87.67 Special Price $70.32
  23. Martin Lewis w/Lincomycin; HDx, 15x100mm plate R
    SKU: E39-PK
    Manufacturer: Hardy Diagnostics
    Martin Lewis Agar with lincomycin, reduced vancomycin, colistin, amphotericin, and trimethoprim) For the selective isolation of Neisseria gonorrhoeae. Comparable to: BD 297928 (10 per PK)
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    was $24.06 Special Price $19.30
  24. Brucella Broth, 500 Grams
    Manufacturer: Research Products International
    Dimensions: 3.50 x 7.00 x 3.50 Weight: 1.23 - Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $86.30
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