Tiêu đề BIOCHEM TEST CONCISE ✅

Test Positive Reaction (🟢) Negative Reaction (🔴) Catalase 🫧 Bubbling — Staphylococcus, Bacillus ❌ No bubbles — Streptococcus, Enterococcus Oxidase 💜 Purple in ≤10 sec — Pseudomonas, Neisseria ➖ No color change — E. coli, Enterobacter Coagulase 🧬 Clump/Clot — S. aureus 🚫 No clump — S. epidermidis Indole ❤️ Red ring — E. coli 🟡 Yellow — Enterobacter Methyl Red ❤️ Red — E. coli 🟡 Yellow/Orange — Enterobacter Voges-Proskauer ❤️ Red — Enterobacter, Klebsiella ➖ No red — E. coli
Citrate 💙 Blue — Enterobacter, Klebsiella 💚 Green — E. coli Urease 💖 Pink — Proteus, Klebsiella 🟡 Yellow — E. coli TSI Agar Varied (e.g., A/A + gas — E. coli; K/A H2S — Salmonella) No change — Pseudomonas Motility 🌫 Diffuse growth — E. coli, Proteus 🎯 Growth along stab — Klebsiella Nitrate Reduction 🔴 Red after reagents or no color after zinc — E. coli 🔴 Red after zinc — Acinetobacter Phenylalanine Deaminase 💚 Green — Proteus, Morganella ➖ No color — E. coli ONPG 💛 Yellow — E. coli, Enterobacter ⚪ Colorless — Salmonella Decarboxylase 💜 Purple — Enterobacter 🟡 Yellow — E. coli (some) H2S Production ⚫ Black — Salmonella, Proteus ➖ No blackening — E. coli DNase 🟡 Clear zone — S. aureus ➖ No clear zone — S. epidermidis Bile Esculin ⚫ Black — Enterococcus, Group D Strep ➖ No blackening — S. pyogenes Growth in 6.5% NaCl 🌫 Turbid — Enterococcus Clear — Strep. bovis