What type of bacteria are round-shaped and can cause pus formation and illnesses like blood poisoning?

The type of bacteria that are round-shaped and can lead to pus formation and illnesses like blood poisoning are classified as cocci. Cocci are spherical bacteria that can exist singly, in pairs, chains, or clusters. They play a significant role in various infections; for example, certain strains of cocci, such as staphylococci and streptococci, are known to cause skin infections, respiratory illnesses, and more severe conditions like sepsis.

Understanding the morphology of bacteria is crucial in the field of cosmetology, as recognizing potential infections can help in maintaining hygiene and sanitation in beauty practices. Bacilli, on the other hand, are rod-shaped bacteria, while spirilla are spiral-shaped and vibrio are comma-shaped; none of these typically cause pus formation in the same manner as cocci do. This distinction helps in identifying the types of bacterial infections and understanding their potential impact on health.