1. This is the classic counterstain in both Gram stains , and endospore staining. 2. When stained with Gram stain , ascospores appear Gram-negative, while vegetative cells appear Gram-positive. 3. One commonly recognizable use of differential staining is the Gram stain . 4. He obtained vaginal smears, gram stains , and basic aerobic cultures of vaginal secretions. 5. When stained with Gram stain , ascospores are gram-negative while vegetative cells are gram-positive. 6. A major milestone in medical microbiology is the Gram stain . 7. This technique, the Gram stain , continues to be a standard procedure in medical microbiology. 8. The Gram stain can rule in the diagnosis of septic arthritis, however cannot exclude it. 9. "' Gram-positive bacteria "'are bacteria that give a positive result in the Gram stain test. 10. Diagnosis is by aspiration ( giving a turbid, non-viscous fluid ), Gram stain and CRP ).