Name: Spreader, L Shaped, 100 Pack
Brand: United Scientific
SKU: UNLSPREAD-PK/100
Price: 36.20 USD
Availability: InStock

<h2 data-section-id="zxodkx" data-start="0" data-end="29">What Is Bacterial Culture?</h2>
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Bacterial culture is the laboratory process of growing bacteria under controlled conditions to isolate, identify, count, and study microbial organisms. Bacteria are typically cultivated on solid agar media in petri dishes or in liquid nutrient broths, allowing microbiologists to observe colony characteristics, determine bacterial species, perform antimicrobial susceptibility testing, and assess microbial contamination. The process begins with inoculating a sample onto a suitable growth medium using a sterile inoculating loop or needle, followed by incubation under conditions appropriate for the target organism. Bacterial culture remains a fundamental technique in clinical diagnostics, pharmaceutical quality control, food safety testing, environmental monitoring, and microbiological research.
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<h2 dir="ltr">What You Will Find:</h2>
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<a href="https://mbpinc.net/consumables/microbiology/bacterial-culture/petri-dishes">Petri Dishes</a>
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Level, stable platform for uniform agar depth
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High optical clarity for accurate observation
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Ventilated lids for airflow with reduced condensation
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Rigid, stackable design for stability
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Smooth surface for easy inoculation
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Sterile, multi-size options for varied lab use
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<h2 data-section-id="luw0co" data-start="835" data-end="881">How to Choose Bacterial Culture Consumables</h2>
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Petri Dishes: Size and Lid Type
Petri dishes provide the primary surface for bacterial growth on solid media. The 90 mm polystyrene petri dish with a vented lid is the standard format for routine bacterial culture, offering adequate space for colony isolation and enumeration. Smaller 60 mm dishes are commonly used for teaching laboratories and limited-volume applications, while larger 150 mm dishes are suitable for high-density plating and specialized microbiological procedures. Vented lids promote airflow and support aerobic growth, whereas non-vented lids help reduce moisture loss and are often used during transport or specialized incubation conditions.
Inoculating Loops and Needles
Sterile inoculating loops and needles are used to transfer microorganisms between samples and culture media. Calibrated 1 &micro;L loops are commonly selected for quantitative culture procedures such as urine culture testing, where accurate sample volume is essential. Ten-microliter loops are typically used for routine streak plating and subculturing. Flexible polypropylene loops work well for agar surface streaking, while rigid needles are preferred for stab cultures and inoculation of semi-solid media.
Agar Media Selection
The choice of agar medium depends on the microorganisms being cultured. General-purpose media such as nutrient agar and tryptic soy agar support the growth of a wide variety of bacteria. Blood agar is commonly used for cultivating fastidious organisms and observing hemolytic reactions. Selective and differential media, including MacConkey agar and chocolate agar, help isolate specific bacterial groups and aid in organism identification.
Culture Tubes
Culture tubes are used for liquid culture growth, dilution series, specimen transport, and biochemical testing. Available in various sizes and materials, they should be selected based on the intended application and compatibility with the culture medium. Polypropylene tubes provide enhanced chemical resistance, while polystyrene tubes offer greater transparency for visual observation.
Compare Petri Dish Formats for Bacterial Culture
The 90 mm vented petri dish is the most widely used format for routine bacterial and fungal culture. Smaller 60 mm dishes are useful for educational settings and limited sample volumes, while larger 150 mm dishes provide increased surface area for dense cultures and specialized testing. Non-vented dishes help retain moisture during extended incubations, and compartmentalized dishes allow multiple media types or samples to be evaluated within a single plate, improving laboratory efficiency.
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<h2 data-section-id="1jl751w" data-start="3518" data-end="3543">Specifications Context</h2>
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Modern microbiology petri dishes are typically manufactured from sterile, transparent polystyrene and supplied ready for use. Most disposable dishes are sterilized using validated irradiation processes and produced under controlled manufacturing conditions to ensure product consistency. For reliable colony counting, microbiological guidelines generally recommend plates containing between 30 and 300 colony-forming units (CFU). Laboratories performing quantitative culture procedures commonly use calibrated disposable loops to improve accuracy and reduce contamination risk. Together, petri dishes, inoculating loops, culture tubes, and appropriate growth media form the foundation of bacterial culture workflows across clinical, industrial, and research laboratories.
Is your bench ready for the next round of inoculation? Don&rsquo;t let a sub-par dish affect your culture&rsquo;s morphology.&nbsp;<a href="https://mbpinc.net/consumables/microbiology/bacterial-culture" title="Connect with the MBP team">Connect with the MBP team </a>today for bulk pricing and find the perfect dimensions for your specific microbiology workflow.

Bacterial Culture

United Scientific

Key Specifications

Spreader, L Shaped, 100 Pack

The United Scientific® Spreader, L Shaped by United Scientific is a sterilized L-shaped spreader for distributing samples evenly across agar in petri dishes. Smooth, rounded edges prevent gouging or scraping the medium, and the spreaders are ethylene oxide sterilized and sold in packs of 100. Microbiology research and teaching labs use them for spread plating, colony counts and transformation plating.