The cell wall of most bacteria has an overall net negative charge and thus can be stained directly with a single basic (positively charged) stain or dye. This type of stain allows us to observe the ...

A team of researchers at the University of California, Los Angeles (UCLA) has introduced a virtual Gram staining technique that could transform how microbiologists stain and classify bacteria.

A lab technician then counts the stained bacteria and uses a grading system ... have developed an easy-to-use and portable chip-based diagnostic system that can detect as few as 20 bacteria ...