Define the terms: Contamination, Colonization, Infection, Inapparent/sub-clinical infection, Infectious disease/clinical infection, Probability of manifestation, Endogenous infection, Exogenous infect

Here are the explanations for the terms provided:

• Contamination: This refers to the mere presence of microorganisms on objects, in the environment, or in samples, without necessarily causing infection or disease.
• Colonization: This is the presence of microorganisms on skin or mucous membranes without penetrating into tissues. It can involve normal flora or, occasionally, pathogenic microorganisms that are not yet causing disease.
• Infection: This is the invasion of a host organism by microorganisms, leading to their proliferation and a host reaction.
• Inapparent/sub-clinical infection: This is an infection that occurs without any observable clinical symptoms.
• Infectious disease/clinical infection: This is an infection that results in the outbreak of clinical symptoms, making the disease apparent.
• Probability of manifestation: This is the frequency (expressed as a percentage) with which an infection will lead to clinical symptoms in an exposed individual.
• Endogenous infection: This type of infection arises from microorganisms that are already part of the host's normal colonizing flora.
• Exogenous infection: This is an infection that arises from the invasion of a host by microorganisms from external sources.
• Nosocomial infection: This is an infection acquired during a hospital stay, such as a urinary tract infection, respiratory infection, wound infection, or sepsis.
• Local infection: This is an infection that remains restricted to the initial portal of entry and the surrounding area.
• Generalized infection: This involves the spread of an invading pathogen through the lymphatic system (lymphogenous) and/or bloodstream (hematogenous) from the portal of entry. It often involves infection of organs to which the pathogen has a specific affinity (organotropism) and progresses through incubation, generalization, and organ manifestation stages.
• Sepsis: This is a systemic disease caused by microorganisms and/or their toxic products. It often involves pathogens or their toxins entering the bloodstream from a localized infection, either continuously or intermittently.
• Transitory bacteremia/viremia/parasitemia: This describes the brief presence of bacteria (bacteremia), viruses (viremia), or parasites (parasitemia) in the bloodstream, typically occurring during the course of a first infection.
• Superinfection: This is the occurrence of a second infection during the course of an existing first infection.