EPIDEMIOLO.pptx

ENVIRONMENT

1. EPIDEMIOLOGICAL TRIAD DR.MITTAL RATHOD COMMUNITY MEDICINE DEPT.

2. EPIDEMIOLOGICAL TRIAD ENVIRONMENT AGENT HOST

3. AGENT t r an s m iss i on i s a The f i r s t link i n t h e c hain of dise a se disease agent. The disease agent is defined as a substance , living or non living or a force, tangible or intangible , the excessive presence or relative lack of which may initiate or perpetuate a disease process. A disease may have a single agent, but more factors are responsible for disease transmission.

4. BIOLOGICAL AGENTS VIRUS BACTERIA PROTOZOVA FUNGUS CHARACTERISTICS: Infectivity Pathogenicity virulence

5. PHYSICAL AGENTS Ex p o s u r e to heat, cold, pressure, exc e ssive h u m i d it y , radiati o n, elecricity, sound etc..

6. CHEMICAL AGENTS ENDOGENOUS • EXOGENOUS

7. MECHANICAL AGENTS

8. NUTRITIONAL AGENTS

9. SOCIAL AGENTS

10. OTHERS Hormones Lack of part or structure Chromosomal factors Immunological factors

11. HOST Human being is referred t o as “ s oi l ” a n d the disease agent as “ seed ”

12. DEMOGRAPHIC FACTORS

13. BIOLOGICAL FACTORS

14. SOCIO ECONOMIC FACTORS

15. LIFE STYLE FACTORS

16. ENVIRONMENTAL FACTORS 1. PHYSICAL ENVIRONMENT

17. BIOLOGICAL ENVIRONMENT

18. PSYCHO SOCIAL ENVIRONMENT