Development of disease
1Incubation period No sign or symptoms yet,
bacterial replication
Early mild symptoms of the disease, eg:
2 The time between the initial infection and the
Prodromal period
general aches and dicomfort. first appearance of any signs or symptoms.
Pathogens continue to multiply first appearing symptoms
eg: fever, fatigue (nonspecific), contagious
Microorganisms involved
Virulence
Depends on:
No. Infecting microorganisms
Resistance of the host
3Period of illness Specific symptoms to the type of infection, highly
contagious.
Infection decreases, symptoms become less, but person can
4
Period of decline
get a secondary infection. Disease is most severe
Patient show sign and symptoms
Sign, symptoms and discomfort decreased (subside)
No. WBC increase and vary
Takes 24hr - days
Strong immune system = illness ends,
Patient vulnerable to secondary infection weak immune = die
“easily to get another infection”
5Period of convalescence
Symptoms resolve, recovery period
1Incubation period No sign or symptoms yet,
bacterial replication
Early mild symptoms of the disease, eg:
2 The time between the initial infection and the
Prodromal period
general aches and dicomfort. first appearance of any signs or symptoms.
Pathogens continue to multiply first appearing symptoms
eg: fever, fatigue (nonspecific), contagious
Microorganisms involved
Virulence
Depends on:
No. Infecting microorganisms
Resistance of the host
3Period of illness Specific symptoms to the type of infection, highly
contagious.
Infection decreases, symptoms become less, but person can
4
Period of decline
get a secondary infection. Disease is most severe
Patient show sign and symptoms
Sign, symptoms and discomfort decreased (subside)
No. WBC increase and vary
Takes 24hr - days
Strong immune system = illness ends,
Patient vulnerable to secondary infection weak immune = die
“easily to get another infection”
5Period of convalescence
Symptoms resolve, recovery period
