Minimal black line icons for bacteria, virus, culture dish, and pipette

A clean white background presents four simple black outline medical and science icons arranged in a balanced 2 by 2 grid. The set includes stylized bacteria, a circular virus symbol with DNA strands, a petri dish filled with microbe shapes, and a pipette with a small droplet at the tip. Thick lines and generous spacing give the illustration a crisp, modern look that reads clearly at small sizes. The stark monochrome palette feels technical and instructional, making the artwork suitable for healthcare, laboratory, microbiology, and biotechnology themes. Plenty of negative space surrounds each symbol, which also makes the image useful for layouts, labels, and educational materials. The overall mood is minimal and clinical rather than decorative, with no shadows, gradients, or background clutter.