Microbiology
Detection of lactose fermentation to differentiate Gram-negative enteric bacteria such as E. coli from non-lactose fermenters like Salmonella
Identifying Gram-positive cocci such as Staphylococcus aureus using selective media enriched for Gram-positive growth
Differentiating fungal pathogens such as Candida albicans from other yeasts in clinical samples
Testing viral infections such as influenza using culture-based diagnostic assays