What three pathogens show beta hemolysis on blood agar?

Three pathogens that show beta hemolysis on blood agar are Streptococcus pyogenes (Group A Streptococcus), Streptococcus agalactiae (Group B Streptococcus), and Staphylococcus aureus. Beta hemolysis indicates the complete lysis of red blood cells, resulting in a clear zone around the colonies on the agar. These organisms are significant in clinical microbiology due to their association with various infections in humans.