Causes of Infectious Diseases

 

• Host Organism Interaction
• Transmission of Infection

1. Endogenous Infection
2. Airborne spread
3. Facco-Oral Spread
4. Vector-Borne Disease
5. Direct Inoculation and Consumption of the Infected Material

Infectious Diseases: Host Organism Interaction

Infectious Diseases: Transmission Of Infection

The inner skin of the body, called as endogenous, and the large intestine or bowel has a lot of micro organisms, which when relocated to inappropriate body part cause different diseases to occur. In the same way if these micro organisms are transferred from one body to another then they also result in diseases to occur. Hepatitis bacteria is a common example. Sometimes, few diseases are also transferred from animals to the humans by various viruses and common of them is called zoonoses. These infections reach the human body from animals through indirect ways or indirect ways like eating the flesh of diseased animals.
Infectious organisms enter the human body from many different routes:

• Infectious Diseases: Endogenous Infection

  Diseases also start spreading in the body if any part or organ of the human body gives access to external organisms. For example the colonic bacteria if enters in urinary tube or they cut the skin cells or even scratch it, various external organisms gain access to internal tissues and organs causing body to be diseased.

• Infectious Diseases: Airborne spread

  Many viruses and bacteria enter in human body by the means of respiration. Secretion from nose and mouth gets polluted and different infection causing organism may enter in the body of uninfected person and cause them to get diseased.

• Infectious Diseases: Facco-Oral Spread

  Getting infection orally is one of the common causes of spread of infection. For instance, eating dirty and contaminated foods grown on diseased lands or irrigated with infected water or sharing infection ridden foods is common in children, which causes infections.

• Infectious Diseases: Vector-borne disease

  Many infectious diseases like malaria or fever get transferred from one person or animal to other person. This spread occurs normally in the areas of warm temperatures. But it may also happen in areas with normal temperatures the year round.

• Infectious Diseases: Direct inoculation

  When the body tissues breakdown by small and weak organisms entered in the body for vaccination purposes it might also cause infections. The situations in which these infections might occur include the ways like transfusion of blood. The viruses of rabies are vaccine in the body if any animal bites the human body.

• Infectious Diseases: Consumption of the Infected Material

  Consuming food that had caught infection from animals is a common cause of diseases in third world countries. Kuru is one of those infections that is caused by consuming food infected by a snake.