Answer :
Final answer:
Infections are classified as focal, local, secondary, co-infection, or systemic based on the pathogen's spread and impact. Focal infections spread within the body, local infections remain contained, secondary infections arise following an initial infection, co-infections involve additional pathogens, and systemic infections affect multiple organs or systems.
Explanation:
Infections can be classified based on how they spread within the body. Here are the matches for the types of infections described:
- A focal infection is when an infection goes from one place to another within the body.
- A local infection remains confined to one place.
- A secondary infection occurs due to the primary infection compromising the host's defenses, which can sometimes be due to antibiotic treatment.
- When another disease-causing agent comes to infect, it could be considered either a secondary infection or a co-infection, depending on the context and timing relative to the first.
- A systemic infection is when a pathogen spreads through the body, affecting multiple systems or organs.
Each stage of pathogenesis—exposure, adhesion, invasion, infection, and transmission—is critical for the pathogen to cause disease. Understanding these stages helps medical professionals prevent and treat infectious diseases more effectively.