Final answer:
The bacteria in question are Streptococcus pyogenes, which are known for causing strep throat and various other infections that can be mild or severe, potentially leading to life-threatening conditions if untreated.
Step-by-step explanation:
The pus-forming bacteria that grow in clusters and can cause infections such as strep throat and blood poisoning are known as Streptococcus pyogenes. These bacteria are classified as Group A streptococci (GAS) and exhibit beta-hemolytic properties, making them a common cause of bacterial pharyngitis. They can generate a variety of infections, from mild skin conditions like impetigo to more severe illnesses such as necrotizing fasciitis, also called flesh-eating disease.
S. pyogenes is also known for producing exotoxins that can lead to severe complications like scarlet fever, characterized by a fine red rash and a 'strawberry tongue.' It's essential to treat these infections promptly to prevent progression to sepsis or toxic shock syndrome, potentially life-threatening conditions.