I've been working on fungal projects and recently, my petri dish has been constantly contaminated by 'this' thing. I'm not 100 percent sure if it is bacteria or yeast. Someone please tell me what that is and how to prevent it. Thank you so much!
On the agar plates you have mites feeding on fungal spores and hyphae. The visible meandering patterns are the paths along which the mites move and spread the contamination. The mites can be seen under a stereo microscope.