introduction of epidemiology

1. WELCOME
TO
MY PRESENTATION
Isa talukder

2. The application of epidemiology
in aquatic animal health –
opportunities and challenges

3. • The term epidemiology is derived from the Greek word
epidemic.
– Epi means-Among, upon,
– Demos means people or population and
– Logos means scientific study.
• So..
– it is the scientific study of the disease pattern in
population.
– In broad sense, it is the study of effects of multiple
factors on health.
– It is multidisciplinary subject involving those of the
physician, Biologists, Public Health experts, Health
educators etc

4. Now more comprehensively defined in the
Oxford English dictionary as-
“The branch of medicine which deals with the
incidence, distribution and possible control of
diseases and other factors relating to health.’’

6. Endemic vs Epidemic

7. Aims of Epidemiology
According to the International Epidemiological Association
(IEA) Epidemiology has three main aims.
– To describe and analyze diseases occurrence and distribution in
populations;
– To identify etiological factors in the pathogenesis of diseases;
– To provide the data essential to the planning, implementation and
evaluation of services for the prevention, control and treatment of
diseases and to the setting up of priorities among those services.

8. The ultimate aims of epidemiology can
be concluded in to two followings points.
 To eliminate or reduce the health problem or its
consequences and
 To promote the health and wellbeing of society
as a whole.

9. Humans use the aquatic environment for a range of
service:
 Potable water
 Wild capture fisheries
 Aquaculture
 Irrigation
 Travel
 Recreation and
 Waste disposal
Interrelationship
Over 230 aquatic animal species are now farmed.
Globally aquaculture and fisheries supplied 110 million tones of
food in 2006.

10. Aims to summarize the application of aquatic animal
epidemiology in three key areas of aquatic animal health:
1.Trans boundary and emerging aquatic animal
diseases
2.Disease monitoring , surveillance and surveys and
3.Spread and impact of aquatic animal pathogens

11. Components of epidemiology
Disease frequency
Distribution of diseases
Determinants of diseases
Salmonella
Typhi
Young Age,
more in
males, Low
immunity
power, Lack
of personal
hygiene
Polluted
water,
open
defecation
Disease