Infection and its Types in Microbiology
- Infection is a condition of host in which parasite lives, multiplies in the host body.
- Infection normally occurs when a parasite is very active and it suppresses the host defense mechanism.
- Depending upon the nature of host, parasite and the persistence of the disease the infection is divided into following types.
1. Chronic infection
- Chronic infection is a long lasting infection.
- Examples :- Diabetes, Cancer, Sickle cell anemia, Autoimmune diseases etc .
2. Acute infection
- It is a disease that spreads rapidly in short period of time.
- Example:- Common cold, Chicken pox, Pneumonia etc.
3. Primary infection
- It is a primary infection caused by parasite as it enters the host body.
- Examples:- Immunodeficiency diseases, HIV/AIDS.
4. Secondary infection
- Secondary infection is caused in a host which is already infected by primary infection.
- The primary infection is caused by one parasite and secondary infection is caused by other parasite in the same host body.
- Examples:- Infection like Common cold, Tuberculosis are the secondary infection caused in the patient suffering from HIV.
- Reinfection is a infection that subsequently occur in the host by same parasite.
- Example:- Reinfection of Tuberculosis,Common cold.
6. Congenital infection
- It is the infection that is transmitted from a mother to new born baby
- Examples:- Hepitatis B, HIV, Herpes zoster.
7. Generalized infection
- The infection in which the host is infected by one or more parasite.
- These parasite travel from one part to other parts of a body and cause infection is called as generalized infection.
- In generalized infection variety of signs and symptoms observed.
- Examples:- Systemic infection like Aches, Chills,Fever,Nausea, Vomiting, and weakness.