N125 N125 Spring 2025 Study Material+
Questions & 100% Correct Solutions
Nature of Infection
1. Infection
2. Colonization
3. Communicable Disease
4. Symptomatic
5. Asymptomatic
Infection
invasion of the body by a pathogenic organism
Colonization
the presence and growth of microorganisms within a host but without tissue invasion or
damage
communicable disease
A disease that can be spread from one person or species to another.
Symptomatic Infection
when the infection has signs and symptoms like fever, cough, etc
Asymptomatic Infection
Infection without noticeable symptoms.
Chain of Infection
1. Infectious Agent
2. Reservoir
, 3. Portal of Exit
4. Mode of Transmission
5. Portal of Entry
6. Susceptible Host
Types of Infectious Agent
1. Bacteria
2. Fungi
3. Protozoa
4. Virus
Reservoir
A place where microorganism survive, multiply, and wait to transfer to a susceptible
host
Examples of Reservoir
Food, Oxygen., Water, and Temperature, pH, light
Stages of Infection
Incubation period (pathogen invasion to 1st symptom)
Prodromal stage (non-specific S&S to specific S&S)
Full stage of illness (S&S specific to disease is noted)
Convalescent period (acute symptoms of infection disappear)
Localized Infection
an infection that is limited to a specific location in the body and has local symptoms
Systemic Infection
infection spreads to several sites and tissue fluids usually in the bloodstream
Questions & 100% Correct Solutions
Nature of Infection
1. Infection
2. Colonization
3. Communicable Disease
4. Symptomatic
5. Asymptomatic
Infection
invasion of the body by a pathogenic organism
Colonization
the presence and growth of microorganisms within a host but without tissue invasion or
damage
communicable disease
A disease that can be spread from one person or species to another.
Symptomatic Infection
when the infection has signs and symptoms like fever, cough, etc
Asymptomatic Infection
Infection without noticeable symptoms.
Chain of Infection
1. Infectious Agent
2. Reservoir
, 3. Portal of Exit
4. Mode of Transmission
5. Portal of Entry
6. Susceptible Host
Types of Infectious Agent
1. Bacteria
2. Fungi
3. Protozoa
4. Virus
Reservoir
A place where microorganism survive, multiply, and wait to transfer to a susceptible
host
Examples of Reservoir
Food, Oxygen., Water, and Temperature, pH, light
Stages of Infection
Incubation period (pathogen invasion to 1st symptom)
Prodromal stage (non-specific S&S to specific S&S)
Full stage of illness (S&S specific to disease is noted)
Convalescent period (acute symptoms of infection disappear)
Localized Infection
an infection that is limited to a specific location in the body and has local symptoms
Systemic Infection
infection spreads to several sites and tissue fluids usually in the bloodstream
