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. Inoculating Needle/Loops 1uL Rigid, Sterile pk1000, Blue
    Manufacturer: Heathrow Scientific
    Inoculating Needle/Loops 1uL Rigid, Sterile pk1000, Blue (1000 per PK )
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    was $79.33 Special Price $69.70
  2. Swabcheck Ecoli 4ml 125/Pk
    Manufacturer: GVS North America
    Swabcheck Ecoli 4ml 125/Pk (125 per PK )
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    was $756.87 Special Price $607.08
  3. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Saline Solution
    Manufacturer: GVS North America
    ENVIRONMENTAL SURFACE COLLECTION KIT, 10ML TRANSPORT TUBE WITH 10ML SALINE SOLUTION AND 1PC FOAM SWAB (400 per CS )
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    was $775.13 Special Price $621.72
  4. Standard Method Agr w/L&T; HDx,15x65mm Contct Plt R
    SKU: P51-PK
    Manufacturer: Hardy Diagnostics
    Standard Methods 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 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. Standard Methods Agar (Plate Count Agar/Tryptone Glucose Yeast "TGY" Agar) is recommended for use in determining the microbial content in dairy products, food, water samples, and other material of sanitary importance. 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 $54.68 Special Price $43.85
  5. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Letheen Broth And 1PC Foam Swab
    Manufacturer: GVS North America
    Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Letheen Broth And 1PC Foam Swab (400 per CS )
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    was $775.13 Special Price $621.72
  6. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Neutralizing Butter Peptone Wate
    Manufacturer: GVS North America
    Environmental surface collection Kit, 10ml transport tube with 10ml Neutralizing butter peptone water and 1pc foam swab attached cap in tube (400 per CS )
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    was $949.91 Special Price $761.91
  7. Surface Sampling Kit: 10 ml Tube With Built-In Swab And 10 ml Buffered Peptone Water
    Manufacturer: GVS North America
    Surface Sampling Kit: 10 ml Tube With Built-In Swab And 10 ml Buffered Peptone Water (10 per CS )
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    was $42.75 Special Price $34.28
  8. Cetrimide/MAC/VJ; HDx,15x100 Triplt 10/pk R
    SKU: J314-PK
    Manufacturer: Hardy Diagnostics
    Section I: Cetrimide Selective Agar is recommended for the selective isolation and identification of Pseudomonas aeruginosa. Section II: 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. Section III: Vogel and Johnson Agar is a selective medium used for the detection of coagulase-positive, mannitol-positive Staphylococcus aureus strains in clinical specimens and foods. (10 per PK)
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    was $39.12 Special Price $31.38
  9. Standard Methods Agar; HDx, 4oz glass btl, 100ml
    SKU: U95-PK
    Manufacturer: Hardy Diagnostics
    Standard Methods Agar (Plate Count Agar/Tryptone Glucose Yeast (TGY) Agar), 4 ounce glass bottle, 100ml, order by the package of 20, by Hardy Diagnostics (Plate Count Agar) For the cultivation and enumeration of microorganisms in dairy products, food, and water. (20 per PK)
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    was $148.86 Special Price $119.40
  10. BHI AGAR W/BLD, CHLR+GENT PK10
    SKU: W65-PK
    Manufacturer: Hardy Diagnostics
    BHI (Brain Heart Infusion) Agar with Blood, Chloramphenicol and Gentamicin, deep fill, 15x100mm plate, order by the package of 10, by Hardy Diagnostics (Brain Heart Infusion Agar with 5% Sheep Blood, Chloramphenicol and Gentamicin.) Comparable to: Remel R01142 (10 per PK)
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    was $20.06 Special Price $16.09
  11. Swab Neutral Buf 4ml 500/Pk
    Manufacturer: GVS North America
    Swab Neutral Buf 4ml 500/Pk (500 per PK )
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    was $2,567.83 Special Price $2,059.62
  12. Swab Buffer 4ml 125/Pk
    Manufacturer: GVS North America
    Swab Buffer 4ml 125/Pk (125 per PK )
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    was $751.82 Special Price $603.03
  13. SwabKit Yeast+Mold 30/Pk
    Manufacturer: GVS North America
    SwabKit Yeast+Mold 30/Pk (30 per PK )
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    was $450.96 Special Price $361.70
  14. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Buffered Peptone Solution
    Manufacturer: GVS North America
    ENVIRONMENTAL SURFACE COLLECTION KIT, 10ML TRANSPORT TUBE WITH 10ML BUFFERED PEPTONE SOLUTION AND 1PC FOAM SWAB (400 per CS )
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    was $775.13 Special Price $621.72
  15. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml D/E Neutralinzing Broth
    Manufacturer: GVS North America
    ENVIRONMENTAL SURFACE COLLECTION KIT, 10ML TRANSPORT TUBE WITH 10ML D/E NEUTRALINZING BROTH AND 1PC FOAM SWAB (400 per CS )
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    was $775.13 Special Price $621.72
  16. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Neutralizing Butter Peptone Water
    Manufacturer: GVS North America
    Environmental surface collection Kit, 10ml transport tube with 10ml Neutralizing butter peptone water and 1pc foam swab attached cap in tube (400 per CS )
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    was $803.62 Special Price $644.57
  17. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Saline Solution And 1PC Foam Swab
    Manufacturer: GVS North America
    Environmental surface collection Kit, 10ml transport tube with 10ml Saline solution and 1pc foam swab attached cap in tube (400 per CS )
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    was $949.91 Special Price $761.91
  18. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Buffered Peptone Solution
    Manufacturer: GVS North America
    Environmental surface collection Kit, 10ml transport tube with 10ml Buffered Peptone solution and 1pc foam swab attached cap in tube (400 per CS )
    Learn More
    was $949.91 Special Price $761.91
  19. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Letheen Broth And 1PC Foam Swab
    Manufacturer: GVS North America
    Environmental surface collection Kit, 10ml transport tube with 10ml Letheen Broth and 1pc foam swab attached cap in tube (400 per CS )
    Learn More
    was $949.91 Special Price $761.91
  20. Environmental Surface Collection Kit, 10ml Transport Tube With 10ml Butterfield’S Solution
    Manufacturer: GVS North America
    Environmental surface collection Kit, 10ml transport tube with 10ml Butterfield’s solution and 1pc foam swab attached cap in tube (400 per CS )
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    was $949.91 Special Price $761.91
  21. Surface Sampling Kit: 10 ml Tube With Built-In Swab And 10 ml 0.85% Saline
    Manufacturer: GVS North America
    Surface Sampling Kit: 10 ml Tube With Built-In Swab And 10 ml 0.85% Saline (10 per CS )
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    was $38.00 Special Price $30.48
  22. Biologix 1µl blue polystyrene sterile inoculating loops, CS1000
    Manufacturer: Biologix
    Biologix 1µl blue polystyrene sterile inoculating loops. features an ultra-smooth loop surface. packed in a sterile zip-seal bag. 25 loops/pack, 40 packs/case (1000 per CS )
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    was $42.18 Special Price $33.78
  23. NZCYM Broth, 500 Grams
    Manufacturer: Research Products International
    Dimensions: 3.50 x 7.00 x 3.50 Weight: 1.24 - Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $83.45
  24. Mod. BPW w/Pyruvate 1X; HDx, 500ml PC btl 10/pk
    SKU: U289-PK
    Manufacturer: Hardy Diagnostics
    Modified Buffered Peptone Water with Pyruvate, single strength, 500ml fill, 500ml polycarbonate bottle, order by the package of 10, by Hardy Diagnostics MINIMUM ORDER: 2 PACKS For the selective enrichment of enterohemorrhagic E. coli (EHEC) from food samples. ACV Supplement not included. (10 per PK)
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    was $442.11 Special Price $354.61
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