8/13/2019 Infectious diseases.ppt

1/6

Infectious

diseases

8/13/2019 Infectious diseases.ppt

2/6

World Health Organisation ( WHO)

Defined Healthas:

State of complete physical, mental

and social well-being and notmerely the absence of disease orinfirmity.

8/13/2019 Infectious diseases.ppt

3/6

Infection ( disease)

Defined medically as any physical ormental disorder or malfunction with aspecific set of signs and symptoms.

excludes any physical injury such as legbroken during a match.

It is any change other than an injurythat disrupts the normal function of thebody.

8/13/2019 Infectious diseases.ppt

4/6

Infectious disease

Caused by an invading organism orvirus that lives parasitically on or inthe body that may be transmitted

form organism to organism directly orindirectly.

These organisms interfere with thebodys normal working. E.g. cholera &malaria.

8/13/2019 Infectious diseases.ppt

5/6

Organism causes disease pathogens

Pathogens viruses, bacteria, fungi,protozoans, flatworms & roundworms.

Way of transmissions- droplets of liquid

Air

Food

Water Sexual intercourse

Simple touch.

Many disease transmitted through an

intermediate organism or VECTOR, such asMOSQUITOES causes MALARIA,BACTERIUM causes CHOLERA.

8/13/2019 Infectious diseases.ppt

6/6

Infectious diseases transmission

Transmissionvia

Pathogen Type ofmicroorganism

Disease

Air( coughing,sneezing orphysicalcontact)

Varicella influenza virusRubella virusPolio virus

Virus Chicken poxInfluenza (flu)German measles

Poliomyelitis

Bordetella pertussisCorynebacterium diphtheriaeMycobacterium tuberculosis

Bacteria Whooping cough,Diphtheria

Tuberculosis (TB)

Candida sp. fungus Fungal infectionsse.g. candidiasis

(thrush)

Contaminated

water & food

Vibrio cholerae

Salmonella typhi

Bacteria Cholera

Typhoid

Infectedanimals e.gmosquito

Plasmodium speciesVirus

Proctoctista MalariaDengue