4. Conclusion
In this study we demonstrated that with proper modifications of the TLC based direct bioautographic method, antibacterial screening of EO components can be performed on anaerobic and microaerophilic bacteria. Antibacterial effects of clove and thyme EOs on C. perfringens and C. jejuni were compared, and demonstrated that not only the main components of these EOs, but also some of the minor components, could have antibacterial effects and they could have selective effects as in the case of linalool, which was more effective against C. perfringens, than C. jejuni (Figs. 3, 4). The modified method has the potential to find novel compounds with different spectra of antimicrobial actions, against medically important bacteria requiring modified atmospheres. This is important because of antimicrobial resistance emerging among anaerobic and microaerophilic bacterial pathogens.