3. INTRODUCTION
Disease is a departure from
the state of health. Any
variation in the normal
structure or function of a
tissue or an organ of the body
could mean disease.
5. DEFINITION
A condition of the living animal
or plant body or one of its parts
that impairs normal functioning
and is typically manifested by
distinguishing signs and
symptoms.
Marriam Webster
7. Types of diseases
Communicable
1. Caused by Micro
organisms and
worms.
2. Examples :
Cholera, Chicken
pox, Tuberculosis,
Malaria, etc.,
Noncommunicable
1. Diseases are those
which are not due
to any external
infection.
2. Examples :
Anaemia,Diabetes,
Arthritis, etc.,
8. Types of Communicablediseases
Bacterial
1. Bacteria is a single
complex cell which
can survive on its
own inside or outside
the host cell.
2. Most bacteria's are
not harmful.
3. Antibiotics are used.
Viral
1. Virus is smaller and is
not a cell hence
needs a host to
multiply.
2. Range of infection
differs from mild to
severe.
3. Antibiotics do not
work for viral
infections.
