BLOOD AGAR BASE A1 Quality | HX-MEDIA

BLOOD AGAR BASE | HX-MEDIA

Product Overview

Blood Agar Base is a highly nutritious basal culture medium specially formulated for the preparation of Blood Agar Base after the aseptic addition of sterile defibrinated blood, commonly sheep blood. It is one of the most widely used enriched media in microbiology laboratories for the cultivation, isolation, and differentiation of fastidious and non-fastidious microorganisms. The medium is extensively employed in clinical diagnostics, pharmaceutical quality control, veterinary microbiology, food testing, and research laboratories due to its excellent ability to support the growth of a broad spectrum of bacteria.

The medium itself serves as the nutrient-rich foundation for Blood Agar Base and contains carefully balanced ingredients that provide essential growth nutrients such as amino acids, peptides, vitamins, minerals, and nitrogenous compounds. After supplementation with blood, the medium becomes enriched with additional biological growth factors that aid in the recovery and cultivation of delicate and pathogenic organisms that may not grow well on ordinary media.

Blood Agar prepared using Blood Agar Base supports luxuriant growth and excellent colony morphology of medically important microorganisms including:

• Streptococcus spp.
• Staphylococcus spp.
• Enterococcus spp.
• Pneumococcus
• Various Gram-positive and Gram-negative pathogens

One of the most important characteristics of Blood Agar Base is its ability to demonstrate hemolytic reactions produced by bacterial enzymes acting on red blood cells. These hemolytic patterns are extremely important in diagnostic microbiology for presumptive identification and differentiation of microorganisms.

The medium helps differentiate bacteria into:

• Beta hemolytic organisms – produce complete lysis of red blood cells resulting in clear transparent zones around colonies
• Alpha hemolytic organisms – produce partial hemolysis causing greenish or brownish discoloration around colonies
• Gamma hemolytic organisms – show no hemolysis and no visible change in the surrounding medium

The formulation generally contains high-quality peptones and extracts that supply carbon, nitrogen, sulfur, vitamins, and energy sources necessary for microbial metabolism and cellular growth. Sodium chloride maintains osmotic equilibrium, while agar provides a firm and stable surface for colony development and observation.

Blood Agar Base is commonly used for the primary isolation of pathogens from clinical specimens such as throat swabs, sputum, pus, wound samples, blood cultures, urine, and other biological materials. It is also widely used in antimicrobial susceptibility studies, purity testing, sterility testing, and microbiological research.

The medium provides:

• Excellent recovery of fastidious organisms
• Clear and distinct hemolytic reactions
• Enhanced colony morphology and pigmentation
• Reliable and reproducible microbial growth
• Consistent laboratory performance

Due to its versatility, reliability, and broad microbial support, Blood Agar Base remains one of the most essential and routinely used culture media in microbiological laboratories worldwide.

🔬 Key Features

• Nutrient-rich basal medium for Blood Agar preparation
• Supports growth of fastidious and pathogenic bacteria
• Helps detect hemolytic reactions clearly
• Excellent colony morphology development
• Suitable for routine diagnostic microbiology
• Easy to prepare and reliable in performance

🎯 Applications

• Isolation of pathogenic microorganisms
• Clinical diagnostic microbiology
• Detection of hemolytic reactions
• Pharmaceutical and veterinary microbiology
• Food microbiology testing
• Research and teaching laboratories

🧪 Composition (Typical)

Final pH: 7.3 ± 0.2

🛠️ How to Use

1. Suspend the required quantity of medium in distilled water.
2. Heat Blood Agar Base gently to dissolve completely.
3. Sterilize by autoclaving at 121°C for 15 minutes.
4. Cool the medium to 45–50°C.
5. Add 5–10% sterile defibrinated blood aseptically.
6. Mix gently and pour into sterile Petri plates.
7. Inoculate the test organism and incubate appropriately.

⏳ Storage & Shelf Life

• Store in a cool, dry place away from moisture and direct sunlight.
• Keep the container tightly closed after use.
• Recommended storage temperature: 10–30°C.
• Prepared plates should be refrigerated if not used immediately.
• Use before the expiry date mentioned on the label.