Active transport requires:

A. sanitization: Sanitization refers to the process of reducing microbial populations on inanimate objects to levels considered safe by public health standards. It lowers the risk of infection but does not necessarily destroy all vegetative pathogens.

B. degermation: Degermation, also called degerming, is the mechanical removal of microbes from a surface, typically the skin, using friction and antiseptics. It reduces microbial load but does not fully destroy pathogens and is mainly used for living tissues.

C. disinfection: Disinfection is the use of physical (e.g., heat) or chemical agents to destroy vegetative pathogens on inanimate objects. It effectively eliminates most pathogenic microorganisms, though it may not destroy bacterial spores. Disinfection is commonly used for medical equipment, surfaces, and instruments that do not require sterilization.

D. sterilization: Sterilization is a process that destroys all forms of microbial life, including spores. It is more extreme than disinfection and is used for surgical instruments and other items that must be completely free of microorganisms.

E. antisepsis: Antisepsis refers to the application of chemical agents to living tissues to inhibit or destroy microorganisms. Unlike disinfection, antisepsis is safe for skin and mucous membranes but may not completely eliminate all pathogens.

A. Exoenzymes: Exoenzymes are enzymes secreted by pathogenic microorganisms that help them invade host tissues and obtain nutrients. They can break down host cell components such as proteins, lipids, or connective tissue, facilitating spread within the host. Because they enhance the ability of a pathogen to cause disease, they are considered virulence factors.

B. Endotoxins: Endotoxins are components of the outer membrane of Gram-negative bacteria, specifically lipopolysaccharides (LPS). When released during bacterial cell death or division, they trigger strong immune and inflammatory responses such as fever, shock, and hypotension. Their ability to damage host tissues and disrupt normal physiology makes them important virulence factors.

C. Ribosomes: Ribosomes are cellular structures responsible for protein synthesis in all living cells, including bacteria. They translate messenger RNA into proteins necessary for cellular survival and metabolism. Although essential for basic cellular function, ribosomes do not directly contribute to pathogenicity and therefore are not classified as virulence factors.

D. Exotoxins: Exotoxins are potent toxic proteins secreted by certain bacteria during growth and metabolism. They can damage host cells by disrupting normal cellular processes, such as nerve signaling or protein synthesis. Because they directly harm host tissues and contribute to disease severity, exotoxins are major virulence factors.

E. Capsules: Capsules are protective polysaccharide layers surrounding some bacterial cells. They help bacteria evade the host immune system by inhibiting phagocytosis and enhancing bacterial survival in host tissues. This protective function allows pathogens to persist and cause infection, making capsules significant virulence factors.