Products - MacConkey Agar

Phone Orders: 1-877-398-1360
Email Orders: media@udderhealth.com
BA_plate

 

 

Purpose:

This agar is used at Udder Health Systems Laboratory for the detection, selection, and identification of various gram negative organisms from individual cow and environmental samples.

Description:

One of the most common causes of environmental mastitis is coliforms which are gram-negative lactose fermenters. This pink agar is a selective media that uses the characteristic of growth and lactose fermentation to identify gram-negative organisms. Lactose fermentation is expressed on this agar through the production of a pink colony. E. coli and Klebsiella spp. are the most common lactose fermenting mastitis organisms. Both organisms produce a pink colony. E. coli colonies are pink and generally smaller compared to Klebsiella spp., which are larger and produce a pink colony with a mucoidal appearance. Non-lactose fermenting organisms (i.e.Pseudomonas species) will also grow on MacConkey agar, however, the colonies will be colorless or opaque. The antimicrobial components of this agar inhibit the growth of gram-positive and some gram-negative bacteria, such as Pasteurella. When used as a secondary test, the inability of Pasteurella to grow on MacConkey agar is the primary characteristic of this organism used in its identification.

MacConkey Agar - Culture Response:

Organism

Growth

Reaction

Strep. agalactiae

Inhibited

 

Staph. aureus

Inhibited

 

Mycoplasma

Not Applicable

 

Strep. dysgalactiae

Inhibited

 

Strep. uberis

Inhibited

 

E- strep

Inhibited

 

Staph. species

Inhibited

 

E. Coli

Excellent

Pink colonies

Klebsiella pneumoniae

Excellent

Pink mucoid colonies

Klebsiella species

Excellent

Pink mucoid colonies

Pseudomonas species

Excellent

Colorless colonies

Pseudomonas aeruginosa

Excellent

Green/colorless colonies

Pasteurella

No Growth

 

Proteus

No Growth

 

Serratia

Excellent

Pinkish/red colonies*

Bacillus

Inhibited

 

Yeast

No Growth

 

Mold

Not Applicable

 

Nocardia

Not Applicable

 

Prototheca

Not Applicable

 

Trueperella pyogenes

Inhibited

 

C. bovis

Not Applicable

 

*Note: Red color can be due to pigment production, not lactose fermentation.


Other Products:

Blood Agar Plate

This is the standard isolation agar used at Udder Health Systems Laboratory for cultivating a wide range of mastitis organisms from individual cow and bulk tank milk samples.

Inulin Agar Plate

This is an indicator agar used for differentiating Streptococcus uberis from other E-streps in isolates from individual cow samples.  The agar is also used as a selective agar in bedding samples for the isolation of Streptococcus uberis.

MacConkey Agar

This agar is used at Udder Health Systems Laboratory for the detection, selection, and identification of various gram negative organisms from individual cow and environmental samples.

Camp Agar Plate

This is a specialized indicator agar used at Udder Health Systems Laboratory for confirmation of Streptococcus agalactiae suspects.

Salt Agar Plate

This selective agar is used at Udder Health Systems Laboratory for selection of all Staphylococci from bulk tank milk samples.

Modified Edwards Agar Plate

This is a special isolation agar used at Udder Health Systems Laboratory for selection of Streptococcus agalactiae from individual cow and bulk tank milk samples.

MP2 Agar

This is a selective isolation agar used at Udder Health Systems Laboratory for cultivating gram positive mastitis organisms from individual cow milk samples.

Mycoplasma Agar

This is the standard isolation agar used at Udder Health Systems Laboratory for cultivating Mycoplasma organisms from individual cow and bulk tank milk samples.

Prototheca Agar

This specialty selective agar is used for the cultivation of Prototheca sp. from individual cow milk, bulk tank milk or environmental samples.

TNT Agar

This biplate is used at Udder Health Systems Laboratory for selection and identification of both gram-positive and gram-negative organisms.

You may also download our full Culture Media Agars Brochure: Download (pdf)

Pricing Information

Agar Prices

Agar Quantity 1-99 100-399 400+
Camp $1.45/plate $1.20/plate $1.00/plate
Edwards $1.45/plate $1.20/plate $1.00/plate
Inulin $1.45/plate $1.20/plate $1.00/plate
MacConkey $1.45/plate $1.20/plate $1.00/plate
MP2 $1.45/plate $1.20/plate $1.00/plate
Salt $1.45/plate $1.20/plate $1.00/plate
Cow Blood $1.45/plate $1.20/plate $1.00/plate
Prototheca $2.45/plate $2.25/plate $2.00/plate
Mycoplasma $2.45/plate $2.25/plate $2.00/plate
TNT $2.45/plate $2.25/plate $2.00/plate
*The above agars may be combined in any quantity to achieve the price breaks.
 

Testing Supplies

Type Tube Bottle
Bovine Plasma
(Coagulase Test)
$1.00/Tube
(1mL)
100 mL: $40.00
200 mL: $60.00
500 mL: $120.00
Mycoplasma Broth
$1.00/Tube
(3mL)
500 mL: $60.00
 

Quality Control Organisms

Udder Health Systems is offering these organisms for Quality Control. Organisms are shipped out on agar plates Next Day Fed Ex.
Acholeplasma laidlawii $25.00 + Shipping
Trueperella pyogenes $25.00 + Shipping
Bacillus spp $25.00 + Shipping
E. coli $25.00 + Shipping
Klebsiella pneumoniae $25.00 + Shipping
Mycoplasma alkalescens $25.00 + Shipping
Mycoplasma bovis $25.00 + Shipping
Prototheca zopfii $25.00 + Shipping
Pseudomonas aeruginosa
$25.00 + Shipping
Pseudomonas spp $25.00 + Shipping
Staph. aureus $25.00 + Shipping
Staph. spp $25.00 + Shipping
Strep. agalactiae $25.00 + Shipping
Strep. dysgalactiae $25.00 + Shipping
Strep. uberis $25.00 + Shipping
Organisms are shipped out on agar plates via FedEx Next Day Air.
 

Shipping Information

We offer Shipping through the following Carriers:
Carrier Handling Options
FedEX Ground
2nd Day Air
Next Day Air
Saturday Delivery by Air
UPS Ground
2nd Day Air
Next Day Air
Saturday Delivery by Air
 
 
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