Is strep throat still contagious after 24 hours on antibiotics and white spots are evident glands?

Strep throat is caused by bacteria called Streptococcus pyogenes or Group A Streptococcus. After 24 hours of taking antibiotics, strep throat is usually no longer contagious. It typically takes antibiotics 24 hours to kill all the bacteria that can spread to others. When the bacteria are killed, the infection can't be passed on to someone else. However, it is important to finish the entire course of antibiotics prescribed by the doctor to ensure that all of the bacteria are eliminated and to prevent worsening symptoms, complications, and the spread of the infection to others. Additionally, the presence of white spots on the glands does not necessarily indicate that the strep infection is still contagious. While white spots (or "exudate") on the tonsils or in the back of the throat can be a symptom of strep throat, they can also be caused by other infections or conditions. For an accurate diagnosis and to determine if the infection is still contagious, it's best to consult a healthcare professional.