Learn exactly how long strep throat remains contagious with and without antibiotics. Includes contagious timeline charts, prevention tips, and when it's safe to return to work/school.

Understand nitrite positive urine test results: causes, bacterial infections, antibiotic treatments, and prevention strategies. Learn when to seek medical help and avoid false positives.

Comprehensive comparison of Gram positive and Gram negative bacteria: cell wall structures, common infections, antibiotic treatments, resistance patterns, and real-world diagnostic applications.