Causatives of Disease Description:

There can be multiple causes for diseases which can either be immediate or contributory. Immediate causes can further be divided into infectious and non-infectious causes. Diseases caused by microbes are grouped under the category of infectious diseases. Infectious agents include viruses, bacteria, fungi, protozoan and even worms. To get Causatives of Disease Biology Homework Help submit your assignment or essay writing requirements

Causatives of Diseases

Any diseases can have single or multiple causes. These causes can be grouped under two categories immediate causes and contributory causes. The infecting organism comes under the category of immediate cause and other factors like unhygienic environment etc comes under contributory causes.

Immediate causes can be further sub divided into two classes as infectious causes and non-infectious causes.

Infectious causes:It includes microbes as causatives of diseases. These diseases are known as infectious diseases. They can be easily spread in community.

Non-infectious cause:It includes internal factors like genetic makeup etc as causatives. No external agents are involved in this. They do not spread e.g. cancer.

Infectious diseases

Infectious diseases are disease caused by microorganism. Causative agents of infectious diseases include viruses, bacteria, fungi, protozoan and some multicellular organisms like worms. Knowledge of infectious agents is very important as it helps us to decide the kind of treatment needed to eradicate the diseases.

Diseases caused by viruses

Viruses multiply quickly inside host cell.  They occupy the host machinery and use their resources to multiply and divide and in this way they spread the diseases. Different viruses have different processes i.e. all viruses do not share similar processes. Some diseases caused by viruses are common cold, AIDS, small pox, influenza, swine flu etc

 

Diseases caused by bacteria

Bacteria are a class of microorganism that are very closely related to each other. They divide rapidly and spread variety of diseases.Antibiotics are the class of drug generally used to treat bacterial diseases.Antibiotics interfere with bacterial biochemical pathways and block their proliferation e.g. Panicillin a common antibiotic hinders cell wall formation in bacteria’s thus helps killing bacteria.

Antibiotics are not useful against viruses as viruses don’t use any pathways for cell wall formation.

Some bacterial causing infections include typhoid, tuberculosis, anthrax, tetanus etc

 

Diseases caused by fungi: skin infections

 

Diseases caused by protozoan: malaria, kala-azar, trypanosome etc

 

Diseases caused by worms: elephantiasis etc

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