BD 220908 - Lowenstein-Jensen Medium (SLA) Enriched Solid Medium for Mycobacterium Isolation and Culture

BD 220908 - Lowenstein-Jensen Medium (SLA) Enriched Solid Medium for Mycobacterium Isolation and Culture

The BD 220908 Lowenstein-Jensen (LJ) Medium SLA is a specialized egg-based solid medium formulated for the isolation and cultivation of Mycobacterium species, particularly Mycobacterium tuberculosis complex. Manufactured by BD (Becton Dickinson), this selective medium is enriched with glycerol, malachite green, and other growth-promoting nutrients that support mycobacterial growth while inhibiting the proliferation of contaminants. The SLA (Screw-Lid Agar) format ensures sterility, ease of handling, and contamination prevention during long incubation periods. BDs stringent quality standards ensure reliable performance in both clinical and reference laboratories engaged in tuberculosis diagnosis and mycobacterial studies.

Key Benefits

BD Lowenstein-Jensen Medium offers exceptional selectivity and consistency for the recovery of Mycobacterium tuberculosis. Its egg-based composition provides essential nutrients and moisture retention for prolonged incubation, while malachite green effectively suppresses unwanted bacterial growth. The SLA format with a screw-cap closure prevents desiccation and contamination during extended incubation (up to 8 weeks). BDs superior formulation ensures uniform slant consistency, stable pH, and reproducible growth characteristics, contributing to accurate culture results and dependable diagnostic outcomes.

Compatibility and Applications

The BD 220908 LJ Medium SLA is compatible with conventional mycobacterial culture workflows and can be used alongside liquid culture systems for comprehensive detection. It is primarily used for the isolation of M. tuberculosis and other slow-growing mycobacteria from sputum, urine, tissue, or other clinical specimens. The medium is suitable for use in hospital laboratories, public health facilities, and research institutions conducting tuberculosis (TB) culture, susceptibility testing, and strain differentiation studies. It can also be employed for monitoring treatment response through colony morphology and growth rate observation.

Usage Guidelines

Before inoculation, bring the BD Lowenstein-Jensen Medium to room temperature. Inoculate the slant surface with the processed specimen using sterile technique. Replace the screw cap loosely to allow gas exchange and incubate at 3537C in a slanted position for the first 24 hours, then upright for the remainder of the incubation period. Examine weekly for visible colonies for up to 8 weeks. Positive growth of M. tuberculosis typically appears as rough, buff-colored colonies. Do not reheat or autoclave the medium, as this will damage the egg-based matrix and affect performance. Always include positive and negative control cultures for validation.

Certifications, Safety Standards, and Regulatory Approvals

The BD 220908 Lowenstein-Jensen Medium SLA is manufactured under ISO 13485 and ISO 9001 quality management systems and complies with FDA and CE requirements for in vitro diagnostic (IVD) products. It is produced in accordance with Good Manufacturing Practices (GMP) and validated following CLSI and WHO guidelines for mycobacterial culture media. Each batch undergoes rigorous quality control using reference strains such as Mycobacterium tuberculosis H37Rv (positive control) and Escherichia coli (negative control) to ensure selectivity, sterility, and optimal growth characteristics.

Comparison with Competitor Products

Compared to competitor LJ formulations, BD Lowenstein-Jensen Medium provides superior consistency, color stability, and contamination control. While some formulations may dry out or show uneven slopes over long incubation, BDs high-quality egg base and optimized malachite green concentration maintain moisture and selective performance for extended periods. The screw-cap design reduces contamination risks during handling, while the standardized BD preparation ensures reproducibility and diagnostic accuracy across batches and laboratories. These advantages make BD the trusted choice for global TB surveillance and diagnostic programs.

Typical User Profile and Application Scenarios

This product is designed for use by microbiologists, clinical laboratory technologists, and TB control program specialists. It is employed in hospital microbiology labs, public health reference laboratories, and research facilities investigating Mycobacterium species. The BD 220908 LJ Medium SLA is particularly valuable in low- and middle-income countries for culture-based TB detection, as well as in high-throughput diagnostic centers performing confirmatory testing after acid-fast staining or molecular screening.

Best Practices for Use and Maintenance

Store BD Lowenstein-Jensen Medium SLA tubes at 28C in an upright position. Do not freeze or expose to direct light. Avoid contamination by maintaining aseptic conditions throughout inoculation and incubation. Label tubes clearly with specimen ID and inoculation date. Monitor humidity levels during incubation to prevent drying. Dispose of used cultures and contaminated materials by autoclaving or using appropriate biosafety procedures. Regularly verify media performance using reference control strains to ensure consistent diagnostic reliability.

Regulatory and Safety Information

This product is intended for professional laboratory use only. All cultures suspected to contain M. tuberculosis should be handled under Biosafety Level 3 (BSL-3) containment conditions. Use appropriate personal protective equipment (PPE), including gloves, N95 respirators, lab coats, and face protection. Avoid opening culture tubes outside of a biological safety cabinet. Dispose of all biohazardous waste according to institutional and local regulations. Refer to the Safety Data Sheet (SDS) for detailed handling, hazard, and disposal information. BD ensures compliance with WHO and CDC biosafety guidelines for tuberculosis diagnostics.

How to Order

To purchase the BD 220908 Lowenstein-Jensen Medium SLA, add the product to your cart and complete the secure checkout process on the CIA Medical website. For institutional or bulk orders, contact CIA Medical customer service at (312) 275-5850 or submit an inquiry via the online form. CIA Medical provides competitive pricing, fast delivery, and professional support for all BD BBL and Difco microbiological media and tuberculosis diagnostic supplies.