Stages of Infection. All infections progress through a predictable course of four stages (Figure 10.4). Each pathogen can produce distinct and diverse symptoms. An individual's immune response to the pathogen will determine the length and intensity of each stage and account for variability seen between one individual and another.. A secondary infection can sometimes occur after the host's defenses or normal microbiota are compromised by a primary infection or antibiotic treatment. Pathogens enter the body through portals of entry and leave through portals of exit. The stages of pathogenesis include exposure, adhesion, invasion, infection, and transmission.
Stages of Infectious Disease: • Incubation stage - The time between the acquisition of the pathogen and the onset of symptoms. • Prodrome stage - Nonspecific symptoms, such as fever or tiredness, occur. • Disease-specific symptoms - Incre. Back. medical & biological sciences.. This document discusses a health module on the stages of infection and disease prevention. It covers the four stages of infection: entry, multiplication, spread, and recovery. Common routes of entry for microorganisms include the respiratory system, gastrointestinal system, reproductive tracts, and breaks in the skin.