[Evaluation of a new medium using red-cell lysate for the isolation of Campylobacter jejuni and Campylobacter coli].

The researchers trialed a semi-prepared medium with horse globular lysate for isolating two strains of Campylobacter bacteria from human and animal fecal samples and compared the effectiveness with a conventional medium. They found that both media offered similar results, indicating the new medium could be an effective alternative.

Research Methodology

• The researchers compared a semi-prepared medium containing horse globular lysate (MLG) with a conventional medium (MC) for the isolation of 19 known strains of Campylobacter jejuni, a bacterium that causes food poisoning.
• These strains were placed on both media and incubated at 42 degrees Celsius for 24 to 48 hours. The scientists created two different atmospheres for incubation – one with 5% oxygen and a candle jar, which is often used in microbiology to create a specific environment.

Key Findings

• The results indicated that the Campylobacter strains grew better in the 5% oxygen atmosphere after 48 hours of incubation.
• Moreover, all strains that were able to grow or be isolated on the conventional medium were also able to thrive in the horse globular lysate medium in the candle jar environment.
• They also discovered that the frequency of isolation of Campylobacter from human fecal samples was 5.3% in both media, regardless of the incubation atmosphere used.
• In animal fecal samples, the new lysate medium and the modified Skirrow medium resulted in similar isolation rates, at 34.3% and 35.2% respectively.
• The agreement rate between the two media was remarkably high, at over 99%, suggesting the new medium can effectively isolate Campylobacter bacteria.

Conclusion and Implications

• The study concluded the semi-prepared medium using horse globular lysate is a viable alternative to conventional methods for the isolation of Campylobacter bacteria from human and animal fecal samples.
• This finding is significant as it implies that alternative materials and methods could be employed in bacterial isolation, potentially leading to cost savings and increased accessibility for this type of research.